public key file encryption

Question

We are working on very sensitive data and need to encrypt it, we have decided to use public key encryption.

We basically need a master key that can decrypt everything, a public key which cycles every n days and encrypts everything and lastly a private key for each thing we encrypt.

I've read up on a lot of security and tried a few examples.

My manager says there is a default .net class System.Security.Cryptography that can do what we need but I'm not sure how to implement this kind of system.

Can anyone help me or point me in the right direction here?

Answer 1

您可以从这里开始：“生成用于加密和解密的密钥”（ http://msdn.microsoft.com/zh-cn/library/5e9ft273(v=vs.110).aspx ）