The purpose of this paper is to provide a description of the Nofish cryptographic algorithm. This paper is intended to release the algorithm to the cryptographic community, for its future analysis and possible use. The name of the algorithm comes in respect to other well-known secure crypto algorithms like Blowfish and Twofish and since this one has not gained this status, I call it Nofish. 1. ...

--------------------------------------------------------------------ABSTRACT-----------------------------------------------------------An algorithm of symmetric stream cipher is proposed embedding a PRNG within it. Stream ciphers require a random key stream. A simple exclusive OR operation is needed between the randomly generated key stream and the text character to obtain the cipher text. Rand...

We present SFINKS, a low-cost synchronous stream cipher for hardware applications with an associated authentication mechanism. The stream cipher is based on a Simple Filter generator, using the INverse function in F216 to generate the Key Stream. The design is based on simple and well-studied concepts, and its security is analyzed with respect to the portfolio of known cryptanalytic attacks for...

Abstract PudgyTurtle is not a cipher, but rather an alternative way to utilize the keystream in binary-additive stream-cipher cryptosystems. Instead of modulo-2 adding plaintext, uses encode 4-bit groups and then encipher each codeword. One goal make time–memory tradeoff attacks more difficult. Here, we investigate one such attack (a modification well-known Babbage–Golić method), show that its ...

SNOW 2.0 is a word oriented stream cipher that has been selected as a standard stream cipher on ISO/IEC 18033-4. One of the general attacks on the stream ciphers is Guess and Determine attack. Heuristic GD attack is GD attack that represents an algorithmic method to analysis the stream cipher with the variables of the same size. The results of HGD attack on TIPSY, SNOW 1.0 and SNOW 2.0 stream c...

Almost all the existing stream ciphers are using two inputs: a secret key and an initial value (IV). However recent attacks indicate that designing a secure IV-dependent stream cipher and especially the key and IV setup component of such a cipher remains a difficult task. In this paper we first formally establish the security of a well known generic construction for deriving an IV-dependent str...

— In this project work, an efficient hardware Implementation of modified RC4 stream-cipher is proposed. In contrary to previous design, which requires four memories each of size 256 X 8, the proposed system can be implemented by using only two memories each of size 128 X 7. Due to the reduction in the memory size the strength of encryption can be increased. Design of RC4 stream cipher for data ...

Fault analysis is a powerful attack to stream ciphers. Up to now, the major idea of fault analysis is to simplify the cipher system by injecting some soft faults. We call it soft fault analysis. As a hardware–oriented stream cipher, Trivium is weak under soft fault analysis. In this paper we consider another type of fault analysis of stream cipher, which is to simplify the cipher system by inje...

The stream cipher Sprout with a short internal state was proposed in FSE 2015. Although the construction guaranteed resistance to generic Time Memory Data Tradeoff attacks, there were some weaknesses in the design and the cipherwas completely broken. In this paperwe propose a family of stream ciphers LILLE in which the size of the internal state is half the size of the secret key. Our main goal...