Friday, November 28, 2008

How to Save Gas through Cylinder Deactivation

Cylinder deactivation puts off the unneeded cylinders while you drive the car and thus reduce the fuel consumed by the car. This technology is safely applied to the V6 and V8 engines so that the engines use half of the cylinders while you drive your car. With this technology the fuel efficiency of your car increases and your car give greater mileage for the same amount of the diesel.

This technology was first used by General Motors in 1980s. The attempt was unsuccessful as the computer technology was not that advanced at that time. Today, it is used widely in vehicles to improve the fuel efficiency. In most of the automobiles the sensors are used which convey the message to the engine to deactivate the unused cylinders.

The technology makes the vehicle to work on less number of cylinders under light conditions like the one while driving on the highway. The extra cylinders are shut down but they are readily available on demand. This is under the computer control in your car which ensures that the power is available when needed.

The cylinder deactivation thus provides with greater flexibility to the cars improving the fuel efficiency. It is the part of the tool kit which is widely used in the automobile industry. It includes hybrid engine, the start stop technology and variable valve timing. The start-stop technology turns off the engine when the vehicle stops.

The vehicles come with improved hydraulic valve lifters, hybrid engines and improved engine tuning enable the vehicle to smoothly transform from the position of cylinder deactivation to the position of using all cylinders when the power is needed most.

The system in Honda comes as Variable Cylinder Management (VCM).This is applied for the first time in Accord with V6 engine. The technology enables the driver to speed the car on three, four or six cylinders. The usage depends on the driving conditions.

The technology was first introduced by General motors in mid sized SUVs such as Chevrolet TrailBlazer in 2005 model. This cylinder deactivation technology will be available in sixteen vehicles in 2008. It was in use in sports vehicles, pickup trucks and minivans. But recently the technology is extended to the passenger vehicles.

The technology turns off the unused cylinders when the car is moving at a set constant speed on a nearly flat surface of the highway. The technology is a way by which the car can be made to run extra miles with the small amount of diesel in the fuel tank thus giving you the improved mileage.

Sunday, November 23, 2008

How to select the Best MP3 Player

The most portable and easy to use device for the music lovers is the MP3 players. It has been successful enough in replacing cassettes, CDs and DVDs and has become the very important part of our life. It accompanies us wherever we go. It is the best travel accessory while traveling and has served even the businessmen to lower their tensions and stress on the move and every youth craves for it.

As we are getting the latest MP3 players with all the features from various companies so it becomes very difficult for us to choose the best player. So here are few tips to help you in getting the best MP3 player in your hand so that you can really go and boast it off in front of your friends.
  • First of all decide that whether you want to play only audio or video as well. If you want video to be played then you will have to buy the MP4 or MP5 player. But if you want to listen to audio then go and buy the MP3 player. And make sure you get with the perfect sound system into it.
  • Second thing to check is about the type of the MP3 player. The one which comes with the Flash memory cannot store much of the songs and is inexpensive. But hard disk players are of high capacity storage and are expensive. They even consume more power as compared to flash mp3 players.
  • Another thing to keep in mind is about the memory that comes in these players so that you can decide how many songs you want to store in it and buy according to that.
  • Even look out for the battery whether it is in built or external and whether it is rechargeable or not. Those players which come with built-in batteries are small in size and are also not so expensive. Also to keep in mind is that MP3 players with external batteries play for a really long time.
  • You should not forget to check for the latest additional features MP3 players come up with. These features include Display screen size & functions, FM radio receiver, built in microphones, recording FM radio, flash video games and easy accessible playlist and titles.
  • Mostly people look out for the LCD screen as they are becoming more popular with clear display.
  • Also look for other accessories such as wireless or corded headset, USB support to transfer songs from your PC to MP3 player, or having the Bluetooth feature.
  • Last thing is take that MP3 player that suits your budget. Ask yourself the range in which you would like to spend and what all you need in it. Take advantage of the advertisements on the various websites or newspapers.
Thus these interesting tips will really prove useful for you when you go to buy that small latest musical device known as MP3 Player.

Friday, November 21, 2008

Best Gadgets and Gifts of Gadgets UK

If you are searching perfect gifts for loved ones then visit Gadgets UK. This online store has wide range of gifts for everyone. The online store has huge collection of gifts to choose from. You can find devices to find lost things, devices to tell you the indoor and outdoor temperature and host of other varieties.

You can find boys toys, gadgets and unusual gift ideas at this store. Among the gadgets category you can find the smart finder. You can use this device to find lost things. This is a remote control device. You can attach this remote sensor device to any thing such as your car keys, mobile phones, wallets and your kids. The remote control transmitter sends radio signals which activate the alarm. These radio signals can pass through the walls and floors and are effective within the range of twenty five meters. Using this device you can quickly locate the things.

Another one, the weather station gives you the weather forecast. You can forecast the weather and find out the temperature both inside and outside your home. This forecast is based on barometric reading so that you get the accurate details about the weather.

With Christmas nearby, the site offers the variety of Christmas gifts for the online shoppers. You can find the digital photo frame, log maker and mini table football. The digital photo frame comes in the size of seven inches. It can display the digital photos with a laptop or personal computer. It comes with slide and zoom features. You just have to insert the memory card and share the photos with your friends.

For all the environment lovers there is the log maker. This item is made of plastic which can be recycled. It converts about thirty percent of the organic garbage into free fuel for open fire. You can use this handy light weight device to convert the garbage in your home into the fuel and contribute a little to your environment.

In the boy's toys category, the most popular item is the Picoo Z. it is a helicopter which works on the lithium power battery. You can hold it over your palm and control it with the infra red beams. It comes with the battery charger which charges the battery in thirty minutes. The strobe LED feature in the helicopter makes it fly even in the night conditions.

Different types of gifts are listed in different categories. Household gadgets are also available. You can find some of the very practical items in the catalogue perfect for the gift. Just browse them.

Wednesday, November 19, 2008

Benefits of Video Conferencing

Video conferencing is getting popular with each passing day. It is seen as the most convenient way of communication for business in all the sectors and the industries. Unlike the voice conferences, this telecommunication method uses interactive telecommunication technology and audio and visual aids for communication. The individuals thus communicating by this process can have more personal interaction than in voice communication.

The business houses are tapping this telecommunication method to conduct conferences and meeting. They are also using the technology to give their customers seeking information, a more personalized interaction with the employees in the organization. The results obtained are more obvious and satisfying than obtained from other communication sources.

The business houses can conduct meetings on the web. The method thus helps to overcome geographical barriers and the time barriers. The employees in different branches and subsidiaries located in different regions and countries can interact among themselves, share their views and information. This helps to cut down the cost on travel and other related activities. The information can be shared any time and any place conveniently.

The technology can be used for any activity. It can be used to conduct interviews, conduct training sessions. It can be used to demonstrate the products to the clients and convey policy changes to all the employees in different branches and subsidiaries located in different regions.
The technology thus provides flexible and versatile solutions to the business houses with branches and subsidiaries scattered in different countries.

Video conferencing not only helps to cut down the costs but also helps in saving the time. The employees don't waste time in travelling to and from the place of meeting. The expenses on fuel and travel reduce drastically. The resources thus saved can be utilized for other business activities. And more over the results obtained are far more satisfactory.

The information and knowledge is transferred at faster rate than by any other source. This method generates more satisfactory results and better knowledge sharing and also forms better method to gather variety of information in less time.

Video conferencing is widely used in business and educational fields. It is also used in surveillance and medical field as telemedicine. It finds its application in emergency response and security as well. In general it is used for conducting business meetings, for giving training in educational institutes and to discuss the medical cases on the web.

With the flexibility and versatility it offers to the different business, it surely offers the business enterprises a solution for connectivity which can earn profits for the enterprise.

Monday, November 17, 2008

How to Convert Your Car to Electric Vehicle

The process requires you to modify the mechanical parts of your car. To convert your car to electric vehicle you require an electric kit. But not all cars can be converted to electric cars. The process is not cheaper either. You spend around $500 in the conversion process.

But the money you spend is worth it. You save money in the long run. The conversion reduces the dependence of your car engine on gasoline. Thus you save money and run your car those extra miles. The conversion of your car to electric vehicle makes it more eco friendly. Hence you also contribute a little from your side in making your environment clean and green. It gives you quite engine.

The conversion process involves the removal of the car engine and placing an electric motor in its place. If you want to make your own car kit then you require batteries, controller battery charger and electric car conversion guide. Next, you follow the instructions in the guide or manual and convert your vehicle into electric car.

There are conversion kits available in the market. These are compatible to most of the gasoline cars. Thus most of the cars that run on gas can be modified to run on batteries.

If you plan to convert your car to electric vehicle, then first thing that you have to do is find out whether your car is light or heavy weight. If light weight, go ahead. But if your car is heavy, try to avoid the conversion. Adding the electric conversion kit leads to adding additional weight to your car. Find out that your car can handle the extra weight.

Next, get the guide or manual in which you find the details about the gasoline engine. You need this so that you are well aware of all the parts in your gasoline car. Along with the manual of gas engine for cars search the manual for the conversion of the gas car to electric vehicle. Read it thoroughly and follow the instructions step by step. Consider about the power steering and air conditioning. Both the things use battery. So, arrange the set up accordingly.

Use both the guides so that you connect and arrange all the parts of your car properly. This ensues that your set up is correct and not defective. You can experiment with your car and turn it into a vehicle which runs on batteries. Converting your car to electric vehicle is not a tough job. You just need to clear your fundamentals about the engine and the set up in your car. You can achieve this with conversion kit and the manuals available in the market.

Friday, November 14, 2008

New Range and variety of Handycam Batteries

There are new range and variety of handycam batteries available in the market. Sony has launched rechargeable H series handycam batteries in the market. These are in the name of Sony infolithium extra capacity battery, Sony handycam camera battery B9594, Sony handycam camera battery 9593, SC5 camcorder battery, vision CCD TRV65 Camcorder battery and Sony NP-FH100 InfoLithium H series battery.

There are other companies as well. Some of such companies manufacturing handycam batteries are Sanyo electric company limited, Spectrum brands, Toshiba America Electronic components, Ultralife batteries and TCL Hyper power batteries.

The InfoLithium battery of Sony is the rechargeable battery in the H series of Sony Infolithium battery category. This battery is compatible with almost all Sony Handycams such as DCRDVD408, DCRDVD308, DCRDVD103, DCRDVD92 and DCRDVD38, to name few of them.

Theses Sony rechargeable batteries keep your handycam running for one hour on a continuous basis. The CCD-TR200 camcorder of Sony uses battery of small size. The battery is of small size when compared to the similar power nickel cadmium battery. NP-FP90 Lithium ion battery is compatible with Sony DVD camcorders, thus it is designed for Sony DVD/HC handycam.

InfoLithium battery is the rechargeable battery given by Sony. The AccuPower Infolithium battery has the AccuPower meter display. This feature tells you about the remaining life of the battery. You can view it on the LCD screen or the viewfinder. Thus you can continue to make the video and keep a track on the remaining life of the battery. When the life is about to get over, you can recharge it. The feature of the battery to recharge anytime set it apart from the nickel cadmium battery. This is because of the fact that the lithium ions are not prone to the memory effect.

Other forms like NP-QM7ID Info Lithium M series rechargeable battery and NP-FM50 Infolithium M series rechargeable battery come under the new range and variety of battery launched by Sony for its camcorder users. ACC-FP71 high capacity battery is compatible with almost all type of handycams.
Battery is an important part of your handycam. You use your handycam to trap those moments which you never want to forget. Therefore you need a reliable battery so that you never miss a chance to capture those important moments.

Different types of batteries are available in the market for your handycam. They are from different manufactures and come in different sizes. Most of them are designed so that they are compatible with different handycams available in the market. New range and varieties are thus available in kits and different offers from the manufacturers, so that you capture the moments and keep them with you forever.

Tuesday, November 11, 2008

Know About Business Technology Online

Information technology has given a new momentum to the growth in business. It is used in the business to manage the database of the employees, customers, suppliers, creditors, debtors and all those associated with the firm. It enables to connect to the employees and the client in different region, carry on with the business transactions, manage inventory. The list is endless. It has seeped into the business process so much that it has become a part of it.

The technology in business has moved from the management of the records to the Enterprise Resource Planning. The business heads take decisions with the help of decision support systems.
The Enterprise Resource Planning commonly called as ERP is a module which enables a business to maintain a common database. Every department of the company can store and retrieve data from this database. This leads to the integration of the data of the company enabling real time information sharing. Thus with this, an employee in the manufacturing department can look into the data of the finance department and verify the invoice status.

Teleconferencing or videoconferencing, which enables the employees and company heads, the facility of conferencing or meetings with the associates of the company separated by the geographical boundaries.

E-marketing is also a very common application of the information technology to the business. The business can reach out to a large number of consumers through marketing their product online. This not only reduces the cost of advertising but also provide a widely used medium that is the internet, to reach the wide range of consumers residing in different regions and countries.

All the transactions can be made online with the use of the latest technologies.
Virtual organization and virtual enterprise which are formed when the companies temporarily come together and form a network, sharing their skills and resources of experts, to gain a competitive advantage over their competitors. Here they connect with each other with the help of information and communication technology.

Software is there to provide you with the possible options in a situation and help in taking decisions. There are management information systems, information systems for finance, strategic management all of which are useful at all the level of the enterprise.

Use of the technology not only brings down the cost associated with the business activities but also help the enterprise to maintain a competitive advantage over its competitors.
Thus information technology is fast changing the face of the enterprises and the business which they carry.

Sunday, November 9, 2008

The Benefits of Digital Television

Digital television includes high definition television. It uses digital signals to give you the movie on your screen. This is in contrast to the traditional televisions which use analog signals to form the picture on the screen that you watch.

What makes the picture quality better in the digital television?

It is the digital signals that the television uses to give the movie on the screen. The screen of these high definition televisions have more number of pixels than the traditional television working on the analog signals. Due to this the picture that is produced on the screen is more sharp and clear as compared to that formed in the screen of traditional televisions working on analog signals.


These televisions work on small bandwidth and give the advantage of multicasting and datacasting to the broadcaster. By multicasting the broadcaster is able to broadcast the programs to different viewers at the same time. It is like storing several files on one single DVD. The broadcaster similarly is able to broadcast several programs on one channel.

The broadcaster or the cable system operator can cast data on the channel along with the programs. Thus it gives the advantage to the cable operator to display different type of information which may be related to the price changes in the merchandise store or the list of the programs that are about to be shown.

You can use the scart lead to record the programs on the digital television. If you have some important appointment when your favorite program is aired or have to go shopping then all you have to do is get a digital video recorder that provide you with the facility to record the programs so that you can watch them later. But just check the capacity of the DVR to record the live TV. They come in different capacity and you can buy them on the basis of your choice and requirement.

You watch more number of channels than on your analog television. The picture is clearer, sharp with high resolution, the sound quality is more superior and picture and sound quality is little affected when there is a storm or the weather goes bad.

If you want to enjoy the experience of digital view on your analog television then you need a set top box or a converter which function by converting the digital signals to the analog so as to form a picture on your analog television. You attach the converter to your television and set the antenna so that you enjoy the show.

Saturday, November 8, 2008

Know About Sim Free Mobile Phones

To gain a greater piece of the market the mobile phone manufacturers and service providers are coming up with new concepts. The most common feature by which the mobile users get attracted to any service provider is low charges and good coverage. Sim free mobile phone is thus a solution to the rising demand of the consumers for cheap and excellent mobile services.

Sim free mobile phones do not require any network connection. The user can make their choice of the network connection and take the service. These are different from the contract mobile phones. These are GSM phones which give the users all the flexibility to choose network. Thus you can buy the mobile set of your choice of any company and insert the sim of any service provider according to your preference.

It can be of a great benefit to you if you are a frequent traveler and visit different regions for business meeting and similar work related issues. You can find the difference if you have used the contract based mobile phone in which you pay the roaming charges and similar charges. The sim free mobile phones give you the freedom to use the sim of the region and avoid such charges.

These sim free mobile are also useful for the mobile addicts who frequently change their mobile phone so that they can use the latest features coming up with the shinny sleek small gizmo. If you are not satisfied with the service of the service provider then you can easily switch over to the services of other provider in the market.

This on the other hand has given rise to the tough competition among the service providers who are coming up with different schemes so as to lure the customers and increase their market share. The customers are getting benefited by new services like free ringtones, caller tunes and other value added services. Although the maximum users mainly choose the service on the basis of the coverage and networking but number is not less of customers who choose the service providers on the basis of value added service.

This on the other side is keeping the service providers on their toes that are coming up with new ideas and services so as to retain their existing customers and make them their satisfied and loyal customers. On the user front, these new schemes are making them difficult to choose among the different service providers.

Thursday, November 6, 2008

What is Digital TV?

The term digital television includes a host of terms associated with it - high definition television, datacasting and multicasting, interactivity and so on. The digital television offers many advantages over the analog televisions. Digital TV provides the broadcaster with the benefit of sending and receiving the videos and sound by data signals. This ensures better picture quality and sound quality.
The digital TV provides the broadcasters the facility of multicasting which gives the user multiple choices for programming. The pictures and videos are clearer and the quality of sound is greatly enhanced.

How the digital TV works?

The data for the channels is coded into digital signals. This is coded into binary codes of one and zero. These codes are compressed and transmitted through the transmitter. These signals are then taken up by the antenna and decoded by the decoder in your television to movie and sound.

This digital stream thus generated requires less space. Thus due to this reduced bandwidth that the digital streams require, other services can be used besides the television services. Such services falling in non television category include multicasting, interactivity and pay-multi media services. Thus the technology besides giving the clear quality movie and sound also helps the user to use different services.

In contrast to the digital signals the analog signals are send continuously even if there is no information that is to be sent. This is the benefit that digital television gives over the traditional analog televisions.

How to watch digital channels on your TV?

If you have your old television set then you need some hardware to enjoy the digital channels. For this you need a set top box and SCART lead. The boxes come in variety of costs depending on your need and craving for the digital channels. Such setups with analog televisions do provide you with the digital channels on your TV but the quality is not that refined as you get to see in the digital televisions available in the market today. The digital televisions today come in different forms:

  1. Enhanced digital television: gives you quality picture with Dolby digital surround sound.
  2. High definition televisions
  3. Standard definition televisions
If you are looking for a freeview then you just give a one time payment and enjoy around thirty channels for free besides few other features. But if you are considering taking the subscription service then you need to compare the costs of different service providers and your requirement before opting for any one among them.

Tuesday, November 4, 2008

Things to Know About Silver Nano Health Technology

Silver nano technology is based on the concept of destroying the bacteria by the use of ionized silver particles. The technology is used in range of electrical appliances like washing machines, refrigerators, vacuum cleaners and air conditioners.

Samsung launched its washing machine which claims of releasing several silver ions during the wash cycle that inhibit the bacterial cell growth and destroy the bacterial cells thus making the clothes germ free and bacteria free. The clothes also get coated with thin layer of the silver ions so that the clothes remain bacteria free for the next thirty days after the wash.

As the silver is effective in killing the bacteria hence it is effective in controlling the bad odors which is in turn caused by the bacterial action on food or other such organic matter. This property is thus used in coating the inner layers of the refrigerators. The Samsung has extended this technology application in their refrigerators by coating the inner walls of the refrigerators so as to keep the fridge free of odors, bacteria and fungus.

There are computer keyboards, mouse and laptops coated with such silver layer so as to make the computer germ and bacteria resistant. A South Korean company is using silver nano colloid technology in its appliances which release silver particles and purify the water that is germ free.

This water can be used for sterilizing different utensils and appliances used frequently in our homes and are considered to prevent us from different infectious diseases like infection of eye and illness. The water can also be used in the preparation of the cosmetics due to its germ free nature. In fact the sterilized water can be used any where for any purpose.

The company also has air purifier working on the same technology and releasing both positive and negative ions to purify the air around in our home. The silver nano perfume ejector can purify the air and make your room smelling clean free of bacteria. It also eliminates the bad odor in the room by using the water particles in the room air and releasing the silver ions that kills bacteria and sterilize the room air.

Although the technology has the benefits of sterilization but the wider application is questioned by the scientists and the researchers who are still not sure of its effect on human being. The environmentalists are also concerned with the use of technology as the released silver ions will effect the biological purification treatment of the sewage and waste water.

Monday, November 3, 2008

Importance of Satellite Communication Technology

There are artificial man made satellites revolving around earth which help us to communicate. In fact they help us in many ways. The television that we watch and the internet that we browse all work through the satellite technology. The technology is in fact used at all those places where the use of cables and wires is practically impossible.

It first and most important application was in inter country long distance telephony. These satellite phones get connected directly through geostationary satellite and then the signals are transmitted to teleport which is connected to a satellite phone system. The technology is used in the regions or places where the submarine communication cables and fiber optic cables is not possible.

The technology is also applied for television and radio broadcasting. Today the dish TV used widely is an improved version of the satellite technology which was given for the first time by Arthur Clarke in 1957. Since then it has improved a lot with dozens of channels for entertainment. The technology has thus benefited the entertainment industry hugely which has also grown and evolved into its present version giving range of entertainment to its viewers.

Technology is used in the military for communication. UHF radio links, global command and control system are some form of application of satellite technology for military communication. Besides this the technology is widely used for global positioning. This is helpful for mapping of regions. A detailed map of a particular region can thus be framed and used for various purposes. Satellite imagery has also gained much importance and is giving many benefits to the researchers in geographical field.
The technology is beneficial for forecasting of weather. With the improvement in technology and new advances being made the weather can be predicted with greater accuracy. This has its own importance as different research expeditions and explorations of various regions are dependent upon weather forecast. The airlines and similar mode of transportations are also dependent on accurate weather predictions.

There are satellite internet services used widely by the business enterprises. The satellite internet provides the enterprises to use VOIP feature. This feature is very important for the companies with branches in remote locations where broadband connections are too costly or are not possible to use due to geographic conditions of the region. The satellite internet thus provides for easy connectivity and prevents the company from all those financial losses due to the use of broadband connections.

Thus the technology has its own importance and is used widely in different fields benefiting us in different ways.

Sunday, November 2, 2008

Advantages of 3G Technology

3G is the latest wireless technology. It is an improvement over 2G providing wireless access to the data and information to the users from any where and anytime. It is the latest mobile technology and in fact the generic name for the host of mobile technologies.

What are its benefits?
You can perform all those functions that you perform at present with your mobile devices but at much higher speed than before. It provides you with faster connectivity, faster internet access, and music entertainment with improved quality. The benefits are immense. You can avail the benefits of video calling. You can call you friend and have a video call facility. The clarity is better and the facility can be enjoyed as long as both of you are using the 3G technology.

You can use your mobile phone as a modem for your computer and mail the important documents. Downloading games and songs is much faster with this technology. You can download your favorite games in your mobile and start playing. You can also download the music videos or simply the songs. The technology enable for much faster download. Hence it will take only few minutes to download movie clips or albums.

You can also view the news headlines get information about the evening weather so that you can plan your party. You can find out the latest baseball score and any latest news about your favorite sport. The 3G phones with their advanced feature will also enable you to watch exciting highlights of your favorite sport. With the increased speed and improved quality of the services provided in the 3G phones, you can view the movie clips and the music videos with more clear picture than with the 2.5G technology mobiles.

The 3G technology provide you with the data transmission speed of up to 2Mbps when you are using the phone in stationary mode. It also provides high degree of connectivity and increased networking and most importantly the resistance to noise.

The technology has in fact increased the bit rate thus enabling the service providers to provide high speed internet facilities, increased call volumes and host of the multimedia applications to their customers. All these services can be provided to the customers on the basis of the amount of data they transmit and not on the time for which they use the service thus making the services cheaper for us.

What next? Just get the 3G mobile and mail your friends, enjoy the video clips before deciding for the movie, download games

Saturday, November 1, 2008

Network and Internet Security

Firewall, Digital Signatures, passwords, antivirus software and digital certificates are some of the network and internet security measures that we use to keep our network and computers safe from different types of viruses, Trojan horse, hackers, password thefts and similar type of security threats.

All such measures can be broadly grouped into following types:
  1. Authentication
  2. Authorization
  3. Confidentiality
Authentication is the method of confirming that the name and the password or the identity of the person trying to access the information is valid. By authorization the computer determines whether the person seeking information should be given privilege to access it. Digital signatures and biometric devices are the authentication forms used by the computer network.

Digital signatures are the signatures that ensure the identity of the sender and also that the original content of the data received is unchanged. These signatures cannot be copied by other person and ensures that the data sent is unaltered. Thus the signature besides being transportable is ensures the validity of the information and thus forms an authentication method. Digital certificates on the other hand are e-credit cards issued by the certification authority. These are used when performing the business transactions online. The digital certificate contains digital signature, name of the sender, a serial number assigned to the sender, the expiry date and the copy of the public key of the sender.

The digital signature and the certificate work on the concept of encryption and decryption and the use of public and private keys. In this the text is converted into the ciphertext, which can only be decoded by the use of the key. The public key is known to all the individuals while the private key is known to the sender of the message.

Other type of security measure most commonly used is firewall. A firewall acts like a wall and prevents the malicious information from entering the network. It is software or a hardware which thus acts as a filter preventing the network from virus threats. It works by either packet filtering or proxy service or by inspection. By proxy service the firewall first retrieves the information send by the system and then passes it to the network or internet. By inspection it identifies certain parts of the packet called as the key parts and compares these key parts with the authentic information or data. By packet filtering it examines each packet of information against set filters thus providing only authentic data to be exchanged between the system and the network.

Thus where firewall and password provide access control, the digital signatures provide for authentication and encryption for the confidentiality and make the network more secure to work on.