What are : RSA, DES, AES, RC5, RC4,SHA, MD

RSA is a Public Key or an Asymmetric Key cryptographic system

DES is a Symmetric Key algorithm, meaning the same key is used for encryption and decryption. DES is a block encryption algorithm.

AES is a symmetric algorithm

RC5 is a symmetric encryption algorithm. It is a block cipher.

RC4 is a stream cipher

SHA, MD are Hashing algorithms