شماره ركورد كنفرانس :
766
عنوان مقاله :
Impossible Differential Cryptanalysis of reduced- round TEA and XTEA
عنوان به زبان ديگر :
Impossible Differential Cryptanalysis of reduced- round TEA and XTEA
پديدآورندگان :
Hajari Masroor نويسنده Iran - Tehran - Sharif University of Technology - Department of Electrical Engineering - Information Systems and Security Lab (ISSL) , Azimi Arash نويسنده Iran - Tehran - Sharif University of Technology - Department of Electrical Engineering - Information Systems and Security Lab (ISSL) , Aghdaie Poorya نويسنده Iran - Tehran - Sharif University of Technology - Department of Electrical Engineering - Information Systems and Security Lab (ISSL) , Salmasizadeh Mahmoud نويسنده Iran - Tehran - Sharif University of Technology - Electronics Research Institute , Aref Mohammad Reza نويسنده Iran - Tehran - Sharif University of Technology - Department of Electrical Engineering - Information Systems and Security Lab (ISSL)
كليدواژه :
Impossible differential cryptanalysis , TEA , Lighweight , XTEA , Block Ciphe
عنوان كنفرانس :
12 دهمين كنفرانس بين المللي انجمن رمز ايران
چكيده لاتين :
TEA and XTEA are two lightweight Feistel block ciphers, each of which has a block size of 64 bits and a key size of 128bits.These two ciphers have ARX structure, i.e. their round functions consist of modular addition, shift and XOR to be exact. Since each operation of TEA and XTEA can be done in a bitwise fashion, we are able to use early abort technique in the impossible differential attack that helps us to remove inappropriate pairs as soon as possible, hence decreasing time complexity. In this paper we present two new 15-round impossible differential characteristics, resulting in thefirstknown impossible differential cryptanalysis mounted on 19 rounds of TEA and 25 rounds of XTEA.
شماره مدرك كنفرانس :
4490565
