منابع مشابه
Differential cryptanalysis of PP-1 cipher
In this paper we present a differential attack on the block cipher PP-1 which was designed at Poznan University of Technology. Complexity of the attack is smaller than that of brute force attack for every version of the cipher (for every block length). The attack is possible is spite of the fact that the S-box exhibits optimal security against the differential cryptanalysis. The attack is based...
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The demand for applications involving Wireless Sensor Network (WSN) or RFID systems is increasing. The sensor in a WSN and RFID tag/reader in a RFID system are called resource constrained devices because these devices have limited processing power, memory size and energy supply. The information transmitted among these low resource devices must be protected from unauthorized access using specifi...
متن کاملCIPHER BLOCK CHAINING Page 1 MODIFIED FORMS OF CIPHER BLOCK CHAINING
A long-standing proposal for modifying cipher block chaining to prevent data expansion is shown to be insecure in some circumstances. Different modifications are then presented which appear secure.
متن کاملThe Block Cipher Hierocrypt
This paper proposes a nested (hierarchical) SPN structure and the symmetric block cipher “Hierocrypt”. In the nested SPN structure, lower-level SPN structures are recursively embedded into S-box positions in SPN of the higher level. This structure recursively assures the lower bound of active S-box number, and high security level is efficiently realized. The 8-round Hierocrypt is implemented in...
متن کاملThe Block Cipher SC2000
In this paper, we propose a new symmetric key block cipher SC2000 with 128-bit block length and 128-,192-,256-bit key lengths. The block cipher is constructed by piling two layers: one is a Feistel structure layer and the other is an SPN structure layer. Each operation used in two layers is S-box or logical operation, which has been well studied about security. It is a strong feature of the cip...
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ژورنال
عنوان ژورنال: International Journal of Applied Mathematics and Computer Science
سال: 2010
ISSN: 1641-876X
DOI: 10.2478/v10006-010-0030-6