ISC specializes in the design and development of standards-conforming conventional and public key encryption and authentication software. ISC offers implementations of all popular cryptographic algorithms including: the Advanced Encryption Standard (AES), the Data Encryption Standard (DES), Triple DES (TDES), the ElGamal and Rivest-Shamir-Adleman (RSA) public key cryptosystems, the NIST Digital Signature Standard (DSA), Diffie-Hellman key exchange, the NIST Secure Hash Standards (SHA-1, SHA-256/384/512), Internet MD2/MD4/MD5 message digests, IEEE 32-bit CRC, etc.