S-Box Modifications and Their Effect in DES-like Encryption Systems
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چکیده
This paper presents the substitution boxes (s-boxes) found in many block ciphers, and more specifically in DES-like encryption systems. It begins with a brief history of the Data Encryption Standard (DES) and the first public question on the chosen s-boxes. An outline of the DES algorithm is presented, along with a more detailed look of the cipher function that uses the s-boxes. The major methods of cryptanalysis are reviewed, including how they use the s-boxes for their attacks, and how the risk can be mitigated by al...
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S-Box Modifications and Their Effect in DES-like Encryption Systems
This paper presents the substitution boxes (s-boxes) found in many block ciphers, and more specifically in DES-like encryption systems. It begins with a brief history of the Data Encryption Standard (DES) and the first public question on the chosen s-boxes. An outline of the DES algorithm is presented, along with a more detailed look of the cipher function that uses the s-boxes. The major m tho...
متن کاملS-Box Modifications and Their Effect in DES-like Encryption Systems
This paper presents the substitution boxes (s-boxes) found in many block ciphers, and more specifically in DES-like encryption systems. It begins with a brief history of the Data Encryption Standard (DES) and the first public question on the chosen s-boxes. An outline of the DES algorithm is presented, along with a more detailed look of the cipher function that uses the s-boxes. The major metho...
متن کاملS-Box Modifications and Their Effect in DES-like Encryption Systems
This paper presents the substitution boxes (s-boxes) found in many block ciphers, and more specifically in DES-like encryption systems. It begins with a brief history of the Data Encryption Standard (DES) and the first public question on the chosen s-boxes. An outline of the DES algorithm is presented, along with a more detailed look of the cipher function that uses the s-boxes. The major metho...
متن کاملHardware Implementation of Dynamic S-BOX to Use in AES Cryptosystem
One of the major cipher symmetric algorithms is AES. Its main feature is to use S-BOX step, which is the only non-linear part of this standard possessing fixed structure. During the previous studies, it was shown that AES standard security was increased by changing the design concepts of S-BOX and production of dynamic S-BOX. In this paper, a change of AES standard security is studied by produc...
متن کاملHow to Strengthen DES Using Existing Hardware
requires more than trillion years on Wiener's machine 20]. Its main advantage is that organizations can increase the security of their systems which use DES in hardware, with the same encryption/decryption speed. An additional advantage is the backward compatibility to the standard DES, that can be achieved by choosing K a = K b = 0 and K c which does not modify the order of the S-boxes. Table ...
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تاریخ انتشار 2017