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A Comment on “Cryptographic Applications of Brahmagupta–Bhãskara Equation”

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1 Author(s)
Amr M. Youssef ; Inst. for Inf. Syst. Eng., Concordia Univ., Montreal, Que.

Murthy and Swamy proposed a symmetric key encryption system based on Brahmagupta-Bhaskara equation over GF(p). In this comment, we show that breaking this system is equivalent to solving a set of linear equations over the field of rational numbers. Our attack, typically, requires as low as three known plaintext-ciphertext pairs and allows the cryptanalyst to fully recover the secret key

Published in:

IEEE Transactions on Circuits and Systems I: Regular Papers  (Volume:54 ,  Issue: 4 )