On the security of a new image encryption scheme based on chaotic map lattices

Abstract

This paper reports a detailed cryptanalysis of a recently proposed encryption scheme based on the logistic map. Some problems are emphasized concerning the key space definition and the implementation of the cryptosystem using floating-point operations. It is also shown how it is possible to reduce considerably the key space through a ciphertext-only attack. Moreover, a timing attack allows the estimation of part of the key due to the existent relationship between this part of the key and the encryption/decryption time. As a result, the main features of the cryptosystem do not satisfy the demands of secure communications. Some hints are offered to improve the cryptosystem under study according to those requirements.

8 pages, 8 Figures

References in corpus (2)

• Cryptographic requirements for chaotic secure communications
• Baptista-type chaotic cryptosystems: Problems and countermeasures

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