trust me, cryptography wasn't changed since 2003. The most popular (even nowadays) asymmetric algorithm (RSA) was described in 1978 and is still the same. My weblog: http://en-us.sysadmins.lv PowerShell PKI Module: http://pspki.codeplex.com Windows PKI reference: on TechNet wiki ok thanks

hi all we know that a computer ( for example creates a public key and private key and also we know that this 2 keys are mathematically related. now i want to know : 1 ) is there any algorithm, by which the CA Creates these keys ? if yes , what is that algorithm ? ( at least what is the name of that algorithm ? ) 2) are the algorithm which CA uses to creates these two keys are known to other systems( other computers ? ) 2) why other computers which may receive the public key ( Certificate ) in transport , are unable to create the related private key from this public key ? ( because i think if the other computers know the algorithm by which these keys have been generated , so intermediate computers can create the associated private key from ( public key + algorithm ) any useful help ? thanks in advance

See link, purchase book. you really need to start doing some of your own research. Google is your friend http://www.amazon.com/Cryptography-Dummies-Chey-Cobb/dp/0764541889 Brian

I believe, you need to learn a bit more about asymmetric keys: http://en.wikipedia.org/wiki/RSA_algorithm In short, there are few statements that describes this: 1) if you know public key, you cannot derive a associated private key. If you know private key, you cannot derive a assiciated public key. 2) the data was encrypted by the public key can be decrypted only by a associated private key. The data was encrypted by the private key can be decrypted only by a associated public key. My weblog: http://en-us.sysadmins.lv PowerShell PKI Module: http://pspki.codeplex.com Windows PKI reference: on TechNet wiki

See link, purchase book. you really need to start doing some of your own research. Google is your friend http://www.amazon.com/Cryptography-Dummies-Chey-Cobb/dp/0764541889 Brian ok thanks Brian. do you know any newer book or refrence about cryptography ? that book was for 2003

trust me, cryptography wasn't changed since 2003. The most popular (even nowadays) asymmetric algorithm (RSA) was described in 1978 and is still the same.My weblog: http://en-us.sysadmins.lv PowerShell PKI Module: http://pspki.codeplex.com Windows PKI reference: on TechNet wiki