desktop security software  
security desktop order software software library technical support

security desktop


Desktop Security

Internet Security

PC Time Limit

Protect Files

Security FAQ

Windows Tips

Internet FAQ


limit, kids, pc, time, security, desktop, child, online, limits, password, control, user, restrict, access, protect, privacy, internet, children




Version for print

What is a digital signature and how does it work?

As we saw in the previous FAQ public-private keys are used to pass sensitive information however it can also be used to provide authentication that a sender is who they say they are. It does not protect the contents of the message, it only proves it is from who it says its from.

It provides authentication and integrity but does not provide confidentiality, data is sent as normal but acts like a normal signature we use on a letter.

A digital signature works by creating a message digest which ranges from between a 128-bit and a 256-bit number which is generated by running the entire message through a hash algorithm. This generated number is then encrypted with the senders private key and added to the end of the message.

When the recipient receives the message they run the message through the same hash algorithm and generate the message digest number. They then decrypt the signature using the senders public key and providing the two numbers match they know the message is from who it says its from AND that is has not been modified.

Security FAQ

Windows Privacy Tools - http//


l Security Officer l Internet Explorer Security l Protect Files l User Time Control l Security Desktop l Site Map

Copyrights 2006 Eugene Mihailov. All rights reserved