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We propose an authenticated encryption scheme for the VMPC-R stream cipher. VMPC-R is an RC4-like algorithm proposed in 2013. It was created in a challenge to find a bias-free cipher within the RC4 de...
We find statistical weaknesses in 20 RC4-like algorithms including the original RC4, RC4A, PC-RC4 and others. This is achieved using a simple statistical test. We found only one algorithm which was ...
We found a statistical weakness in the Spritz algorithm designed by Ronald L. Rivest and Jacob C. N. Schuldt. For N = 8: P rob(output(x) = output(x + 2)) = 1/N + 0.000498. The bias becomes statistic...
We present a new Cryptographically Secure Pseudo-Random Number Generator. It uses permutations as its internal state, similarly to the RC4 stream cipher. We describe a statistical test which revealed ...
VMPC Stream Cipher     VMPC  Stream Cipher       2009/4/10
The VMPC Stream Cipher is a simple encryption algorithm, designed as a proposed practical application of the VMPC one-way function. The general structure of the Cipher is based on an internal 256-...
VMPC One-Way Function     VMPC  One-Way Function       2009/4/9
The VMPC function is a combination of two basic operations – permutation composition and integer addition. The function resulting from this combination shows to have very high resistance to invert...
A stream cipher based algorithm for computing Message Au- thentication Codes is described. The algorithm employs the internal state of the underlying cipher to minimize the required additional-to- ...
1 At FSE 2004 two new stream ciphers VMPC and RC4A have been proposed. VMPC is a generalisation of the stream cipher RC4, whereas RC4A is an attempt to increase the security of RC4 by introducing an...

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