Provably indeterminate 128-bit cipher

نویسنده

  • Nikolay A. Moldovyan
چکیده

There is described a class of the encryption functions based on data-dependent selection of subkeys. Such functions are proposed for elaboration of the indeterminate ciphers with very large number of different modifications of the cryptalgorithm. A 128bit undetermined cipher is described. The number of possible modifications is ≈ 10, where 2 ≤ R ≤ 7, R is the number of rounds. It is proved that all modifications are unique.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Turbo PMC V3 – 1024 Bit Block Cipher for Storage Device Block Level Encryption

A fast and provably secure Polymorphic Block Cipher consisting of a three-round Luby Rackoff Pseudorandom Permutation Generator with a Decorrelation Stage employing a large number of interdependent pseudo-random number generators, combiner routines and permutation functions is proposed. Data-dependent selection of cryptographic primitives with a shared internal state at runtime provides a novel...

متن کامل

On the Security of Tandem-DM

We provide the first proof of security for Tandem-DM, one of the oldest and most well-known constructions for turning a block cipher with n-bit block length and 2n-bit key length into a 2n-bit cryptographic hash function. We prove, that when Tandem-DM is instantiated with AES-256, block length 128 bits and key length 256 bits, any adversary that asks less than 2 queries cannot find a collision ...

متن کامل

Decim − 128 ∗

Decim is a hardware oriented stream cipher submitted to the ECRYPT stream cipher project. The design of Decim is based on both a non linearly filtered LFSR and an irregular decimation mechanism called the ABSG. While the initial call for contributions required hardware-oriented stream ciphers to manage 80-bit secret keys and 64-bit public initialization, designers have been invited to demonstra...

متن کامل

ABC: A New Fast Flexible Stream Cipher Specification

ABC is a synchronous stream cipher optimized for software applications. Its design offers large flexibility concerning key material usage and memory consumption. Here we present a version of ABC with a 128-bit key and a 128-bit IV, a 32-bit non-linear filter, flexible key expansion, flexible and fast IV setup procedures, and variable memory requirements. Corresponding author Partially supported...

متن کامل

The LILI-128 Keystream Generator

The LILI-128 keystream generator is a LFSR based synchronous stream cipher with a 128 bit key. The design offers large period and linear complexity, and is resistant to currently known styles of attack. LILI is simple to implement in hardware or software.

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:
  • The Computer Science Journal of Moldova

دوره 5  شماره 

صفحات  -

تاریخ انتشار 1997