Welch-Gong (WG) 128 Bit Stream Cipher for Encryption and Decryption Algorithm

Provided by: Creative Commons
Topic: Security
Format: PDF
In this paper, the authors present two new hardware designs of the Welch-Gong (WG) 128 cipher, one for the Multiple Output WG (MOWG) versions and the other for the single output version WG based on type-II optimal normal basis representation. The proposed MOWG design uses signal reuse techniques to reduce hardware cost in the MOWG transformation, whereas it increases the speed by eliminating the inverters from the critical path. This is accomplished through reconstructing the key and initial vector loading algorithm and the feedback polynomial of the linear feedback shift register.

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