منابع مشابه
VMPC Stream Cipher
The VMPC function is a combination of triple permutation composition and integer addition. It differs from a simple triple permutation composition with one integer addition operation performed on some of the elements of the permutation. The consequence of this addition operation is corruption of cycle structure of the transformed permutation the fundamental source of the function's resistance t...
متن کاملVMPC One-Way Function and Stream Cipher
A simple one-way function along with its proposed application in symmetric cryptography is described. The function is computable with three elementary operations on permutations per byte. Inverting the function, using the most efficient method known to the author, is estimated to require an average computational effort of about 2 operations. The proposed stream cipher based on the function was ...
متن کاملCryptanalysis of Stream Cipher DECIM
Stream cipher DECIM is a hardware oriented cipher with 80-bit key and 64-bit IV. In this paper, we point out two serious flaws in DECIM. One flaw is in the initialization of DECIM. It causes about half of the key bits being recovered bit-by-bit when one key is used with about 2 random IVs, and only the first two bytes of each keystream are needed in the attack. The amount of computations requir...
متن کاملCryptanalysis of RAKAPOSHI Stream Cipher
RAKAPOSHI is a hardware oriented stream cipher designed by Carlos Cid et al. in 2009. The stream cipher is based on Dynamic Linear Feedback Shift Registers, with a simple and potentially scalable design, and is particularly suitable for hardware applications with restricted resources. The RAKAPOSHI stream cipher offers 128-bit security. In this paper, we point out some weaknesses in the cipher....
متن کاملCryptanalysis of Stream Cipher Alpha1
Komninos, Honary and Darnell recently proposed stream cipher Alpha1. Alpha1 is based on A5/1 and is claimed to be much safer than A5/1. However Alpha1 is insecure: a 29-bit feedback shift register could be recovered with about 3000 known plaintext bits with O(2) operations. The rest of the message could be recovered in the broadcast application in which the same message is encrypted with differ...
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ژورنال
عنوان ژورنال: Tatra Mountains Mathematical Publications
سال: 2019
ISSN: 1210-3195
DOI: 10.2478/tmmp-2019-0011