tailieunhanh - Báo cáo hóa học: "Cryptanalysis of the Two-Dimensional Circulation Encryption Algorithm"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Cryptanalysis of the Two-Dimensional Circulation Encryption Algorithm | EURASIP Journal on Applied Signal Processing 2005 12 1923-1927 2005 Hindawi Publishing Corporation Cryptanalysis of the Two-Dimensional Circulation Encryption Algorithm Christophe De Canniere Computer Security and Industrial Cryptography COSIC Department of Electrical Engineering ESAT Katholieke Universiteit Leuven KasteelparkArenberg 10 3001 Leuven-Heverlee Belgium Email Joseph Lano Computer Security and Industrial Cryptography COSIC Department of Electrical Engineering ESAT Katholieke Universiteit Leuven KasteelparkArenberg 10 3001 Leuven-Heverlee Belgium Email Bart Preneel Computer Security and Industrial Cryptography COSIC Department of Electrical Engineering ESAT Katholieke Universiteit Leuven KasteelparkArenberg 10 3001 Leuven-Heverlee Belgium Email Received 13 February 2004 Revised 25 November 2004 Recommended for Publication by Andy Wu We analyze the security of the two-dimensional circulation encryption algorithm TDCEA recently published by Chen et al. in this journal. We show that there are several flaws in the algorithm and describe some attacks. We also address performance issues in current cryptographic designs. Keywords and phrases chaos-based cryptography cryptanalysis security evaluation TDCEA known-plaintext attack. 1. INTRODUCTION In symmetric-key cryptography two parties share a secret key K to encrypt messages using a cipher. Symmetric encryption techniques are used to efficiently encrypt data. Two common types of ciphers are commonly used nowadays block ciphers and stream ciphers. Block ciphers encrypt blocks of data typically 64 or 128 bits in a fixed key-dependent way. The design of block ciphers is a well-studied area of research. The best known block ciphers are the Data Encryption Standard DES 2 and the Advanced Encryption Standard AES 3 . In the past decade many new attacks on block ciphers have emerged the most important ones being .