How to change or recover your Windows Live Messenger password ShowHow to change or recover your Windows Live Messenger password
1.Changing your password (Windows Live Messenger)
2. Password Recovery
Secret question
Send password reset instructions to your alternative email address
Download MSN Messenger...
XP Recovery Console – Admin password forgotten ShowXP Recovery Console – Admin password forgotten
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Solution
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A while back I bought a Dell Optiplex 210L on Ebay. It's been great till recently when the system crashed and it will not boot. I tried to use the XP recovery...
How to reset your OS X password without an OS X CD? ShowHow to reset your OS X password without an OS X CD?
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I forgot my admin password and I lost my OS X disk! How can I reset the admin password?
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Here is the best and easiest way how to reset your OS X...
Download RAR Password Recovery ShowThe archive of RAR files can be protected with a password in order to limit their access. If you lose your password accidentally, you also lose your data.
RAR Password Recovery is a program designed to recover the passwords of archives with RAR...
Public-key systems Showthe principle of public-key encryption
The principle of asymmetric encryption (also called public-key encryption) first appeared in 1976, with the publication of a work about cryptography by Whitfield Diffie and Martin Hellman.
In an asymmetric...
Private-key (or secret-key) cryptography ShowSymmetric encryption
Symmetric encryption (also called private-key encryption or secret-key encryption) involves using the same key for encryption and decryption.
Encryption involves applying an operation (an algorithm) to the data to be...