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Digital Signature is used to make a digital document / message authentic. Digital (cryptographic) signatures are commonly used for software distribution, financial transactions etc. In US, EU and India, digiatal signature has legal importance.

One can have various types of Digital Signature Certificates (DSC) from any of the Licensed Registration Authority. These legally valid Digital signature has the same validity as handwritten signatures.

Your digital certificate could be used to allow you to access membership-based web sites automatically without entering a user name and password.

Fee Rs 1200 (with e-token)+ 150 (bank charges), Validity of Digital signature : 2 year and it can be renewed. Copy of Photo proof and PAN card are required while filling the application form.

There are 3 types of Digital certificates of varying security - Class 1, Class 2 & Class 3.

Normally digital signatures are kept in Internet Explorer of your computer. Any has access to your Computer can use it and if formatted/explorer is changed, the digital signature will be lost.

To avoid the loss of digital signature and for better security, digital signature is stored as e-token in USB type drives (extra fee of Rs 400) and the device is password protected.

Contact : ISHIKA TECHNOLOGIES PVT. LTD AD-35, SALT LAKE CITY, SECTOR 1, Kolkata - 700064.

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Real time mobile phone tracking

A mobile phone can be tracked on the move without an active call. A mobile always emit a signal and communicates to the near by antenna tower and depending on the signal strength (power) received, the mobile location can be traced.

Real time locating systems use a set of radio receivers to locate the position of the transmitting device.

GPS (Global Positioning System) & GSM (Global System for Mobile communications) mobiles can be tracked with the help of satellites and related software. The mobile can be located on Google map with logitude and lattitude at an accuracy of 1 metre.

GPS is a global radio-navigational system using 24 satellites and it's ground stations. It can work effectively for 24 hours a day with out being affected by weather conditions. A GPS satellite completes two rotations of earth is a day. Sophisticated equipments in the high orbit satellite will calculate one's exact location using triangulation method.

GPS can help you to find out where you are and where you are going. GPS navigation is used in cars, planes, boats, construction equipments, farm machinery, laptop computers etc.

CDMA (Code division multiple access) is a channel access method utilized by various radio communication technologies. One of the basic concepts in data communication is the idea of allowing several transmitters to send information simultaneously over a single communication channel and is called multiplexing.

India uses around 120 crore mobiles for communication. 80% of the world mobile communication is by GSM technology.