.Net library to encrypt files with a very fast implementation of AES 256 bits an - Windows Shareware $50. .Net library to encrypt files with a very fast implementation of AES 256 bits and standard RC4 , the AES ( Advanced Encryption Standard ) is adopted by NIST as an encryption standard to be used when very strong encryption is required , the RC4 is the standard RC4 encryption developed by RSA , the control has optimized code for new AMD Athlon and Intel P4 processors