2. Guang Gong and Kishan Chand Gupta.

Cryptography: Stream and block ciphers. In

**Handbook of Finite Fields**, CRC-Press, by Chapman and Hall, editors, Gary L. Mullen and Daniel Panario, Discrete Mathematics and Its Applications series, ISBN: 9781439873786, 2013.

1. Rana Barua and Kishan Chand Gupta.

Finite Automata. In

**Handbook of Finite State Based Models and Applications**, CRC-Press, by Chapman and Hall, editor, Jiacun Wang, Discrete Mathematics and Its Applications series, ISBN: 9781439846186, 2012.