Encryption and decryption 1 How to implement encryption and

Encryption and decryption

1.       How to implement encryption and decryption into the server (code)

2.       How would the server reply back with an encrypted message

3.       How to run encryption and decryption function into the server

4.       Create user manual for others to run these functions

5.       Implement information into group server

Solution

Symmetric encryption and decryption:
need to use a symmetric key for the encryption try and use two pre-generated keys as SSL does
the sender and recipient use the same secret key to encrypt and decrypt plain text.
This means that the sender and recipient must be in possession of a common (secret) key which they have exchanged before actually starting to communicate.

Asymmetric encryption and decryption:

asymmetric encryption, each subscriber has a personal pair of keys consisting of a secret key and a public key. The public key is public, this means that anyone can

have it. The keys are mathematically related, yet it is computationally difficult to deduce one from the other. Using the public key, anyone can encrypt the plain

text, and only the one that has the private key can decrypt the message.

encrypt() function has the following syntax:
varchar = encrypt(varchar text, varchar ke);
nvarchar = encrypt(nvarchar text, nvarchar key);
The decrypt() function has the following syntax:
varchar = decrypt(varchar text, varchar key);
nvarchar = decrypt(nvarchar text, nvarchar key);

GroupServer is a Web-based mailing list manager designed for large sites. Hence it is similar in this case also to implement encryption and decryption.