Info. Sec. (08): Asymmetric Cryptography by Arfan Shahzad

Asymmetric Cryptography also called Public-key cryptography, involving the use of two separate keys, in contrast to symmetric encryption, which uses only one key. Public-key encryption, first publicly proposed by Diffie and Hellman in 1976, is the first truly revolutionary advance in encryption in literally thousands of years. Public-key algorithms are based on mathematical functions rather than on simple operations on bit patterns, such as are used in symmetric encryption algorithms.