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Open Access

Cryptanalysis of a New Signal Security System for Multimedia Data Transmission

EURASIP Journal on Advances in Signal Processing20052005:962703

Received: 23 August 2004

Published: 31 May 2005


Recently, a new signal security system called TDCEA (two-dimensional circulation encryption algorithm) was proposed for real-time multimedia data transmission. This paper gives a comprehensive analysis on the security of TDCEA. The following security problems are found: (1) there exist some essential security defects in TDCEA; (2) two known-plaintext attacks can break TDCEA; (3) the chosen-plaintext and chosen-ciphertext versions of the aforementioned two known-plaintext attacks can break TDCEA even with a smaller complexity and a better performance. Some experiments are given to show the security defects of TDCEA and the feasibility of the proposed known-plaintext attacks. As a conclusion, TDCEA is not suitable for applications that require a high level of security.

Keywords and phrases

TDCEAimage encryptionchaoscryptanalysisknown/chosen-plaintext attackmultimedia

Authors’ Affiliations

Department of Mathematics, Zhejiang University, Hangzhou, China
Department of Electronic Engineering, City University of Hong Kong, Kowloon, Hong Kong
State Key Laboratory of Information Security, Graduate School of Chinese Academy of Sciences, Beijing, China


© Li et al. 2005