Key Feedback Mode: a Keystream Generator with Provable Security
نویسندگان
چکیده
We propose a key feedback mode of operation for the AES algorithm Rijndael (or any other block cipher), giving efficient synchronous keystream generators. We show that if the block cipher possesses simple properties, normally accepted to exist in any secure block cipher, then also the generator is secure.
منابع مشابه
Keystream Generator with Provable Security How to create a indistinguishable PRSG
Introduction Pseudo-random sequence have been widely used in communication and cryptology. Any (pseudo-) random sequence used in practical system is generated by a machine, a computer or a device, those devices are called (pseudo-) random sequence generator, or PRSG PRSG may be linear feedback shift register, finite automata or some feedback mode using block cipher. Content of this slide what i...
متن کاملImproved Analysis of the BMGL Keystream Generator
In this paper we give an improved security analysis of the NESSIE submission BMGL. The new analysis improves also asymptotically some of the theoretical results on which the BMGL keystream generator is based. We also give an alternative, bootstrapped version of the generator which is implementation-wise very close to the original generator and offers even stronger provable security properties.
متن کاملLIZARD - A Lightweight Stream Cipher for Power-constrained Devices
Time-memory-data (TMD) tradeoff attacks limit the security level of many classical stream ciphers (like E0, A5/1, Trivium, Grain) to 2 n, where n denotes the inner state length of the underlying keystream generator. In this paper, we present Lizard, a lightweight stream cipher for power-constrained devices like passive RFID tags. Its hardware efficiency results from combining a Grain-like desig...
متن کاملHardware Stream Cipher Based on LFSR and Modular Division Circuit
Feedback Shift Registers (LFSR) is presented here. In this method, shift register structure used for polynomial modular division is combined with LFSR keystream generator to yield a new keystream generator with much higher periodicity. Security is brought into this structure by using the Boolean function to combine state bits of the LFSR keystream generator and taking the output through the Boo...
متن کاملBMGL: Synchronous Key-stream Generator with Provable Security (Revision 1)
We propose a construction of an efficient, synchronous keystream generator with provable security properties in response to the NESSIE call for primitives. The cryptographic core of the stream cipher is the block cipher Rijndael. We show that a non-trivial attack on the cipher reduces to an attack on Rijndael. The construction uses an optimization of earlier work on pseudorandom generators by B...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2000