A PAINLESS GUIDE TO CRC ERROR DETECTION ALGORITHMS CRC校验理论与实践的经典教程，Ross写的。-A PAINLESS GUIDE TO CRC ERROR DETECTION ALGORITHMS CRC checksum of the classic theory and practice tutorials, Ross wrote.

RSA ( Rivest Shamir Adleman )is crypthograph system that used to give a secret information and digital signature . Its security based on Integer Factorization Problem (IFP). RSA uses an asymetric key. RSA was created by Rivest, Shamir, and Adleman i