With an attack on a single LFSR is it possible to encounter combination of encrypted and decrypted part of the transmission of length 2m from which it is not possible to build solvable linear equations system?
In the field of classical cryptography, stream ciphers play a significant role in securing data transmission. One commonly used component in stream ciphers is the linear feedback shift register (LFSR), which generates a pseudorandom sequence of bits. However, it is important to analyze the security of stream ciphers to ensure that they are resistant to
- Published in Cybersecurity, EITC/IS/CCF Classical Cryptography Fundamentals, Stream ciphers, Stream ciphers and linear feedback shift registers
In case of an attack on a single LFSR, if attackers capture 2m bits from the middle of transmission (message) can they still calculate configuration of the LSFR (values of p) and can they decrypt in backwards direction?
In the field of classical cryptography, stream ciphers are widely used for encryption and decryption of data. One of the common techniques used in stream ciphers is the utilization of linear feedback shift registers (LFSRs). These LFSRs generate a keystream that is combined with the plaintext to produce the ciphertext. However, the security of stream
- Published in Cybersecurity, EITC/IS/CCF Classical Cryptography Fundamentals, Stream ciphers, Stream ciphers and linear feedback shift registers
How truly random are TRNGs based on random physical processes?
Randomness is a fundamental concept in cryptography, as it plays a crucial role in ensuring the security of cryptographic systems. True Random Number Generators (TRNGs) based on random physical processes are often used to generate random numbers for cryptographic purposes. These TRNGs aim to produce unpredictable and unbiased random numbers by exploiting the inherent randomness
Why a block cipher can be easily turned into a stream cipher while the opposite is not the case?
A block cipher can be indeed easily turned into a stream cipher while the opposite is not the case. This is due to the fundamental differences between block ciphers and stream ciphers, as well as the properties and requirements of each. To better understand this problem, let's first define what block ciphers and stream ciphers
Is it correct that a stream cipher using a truly random key binary sequence is the unbreakable One-Time Pad cipher?
A stream cipher is a type of encryption algorithm that operates on individual bits or bytes of plaintext and produces a corresponding stream of ciphertext. It is based on the use of a key stream, which is generated by combining a secret key with a random or pseudorandom sequence of bits. The key stream is
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