Morris Dworkin, a mathematician from NIST’s Computer Security Division, served as the moderator of the workshop. He welcomed the attendees and introduced the other participants from NIST: Bill Burr, Elaine Barker, Aaron Nelson, and, at the registration table, Vickie Harris and Teresa Vicente. He reviewed the three current Federal Information Processing Standards (FIPS) that establish block ciph...

When designing a new block cipher, the authors must ensure that its design is strong enough for potential attacks or security leaks. That is why at least basic cryptanalysis must be conducted which would point out potential flaws of the crytosystem. In this paper we will discuss some security aspects important for the block cipher BCMPQ Block Cipher by Matrix Presentation of Quasigroups, for it...

The TAE (tweakable authenticated encryption) mode is an authenticated encryption mode which is based on a tweakable block cipher. Previous research results show that the secure tweakable block cipher is not sufficient for the security of the authenticated encryption TAE mode. Only when the tweakable block cipher is strong will the TAE be secure. Some improvements to the TAE mode are also given ...

This paper presents an efficient authenticated encryption construction based on a universal hash function and block cipher. Encryption is achieved via counter-mode while authentication uses the Wegman-Carter paradigm. A single block-cipher key is used for both operations. The construction is instantiated using the hash functions of UMAC and VMAC, resulting in authenticated encryption with peak ...

In this paper we discuss the idea of block cipher embeddings and consider a natural algebraic framework for such constructions. In this approach we regard block cipher state spaces as algebras and study some properties of cipher extensions on larger algebras. We apply this framework to some well-known examples of AES embeddings.

A block cipher is a bijective function that transforms a plaintext to a ciphertext. A block cipher is a principle component in a cryptosystem because the security of a cryptosystem depends on the security of a block cipher. A Feistel network is the most widely used method to construct a block cipher. This structure has a property such that it can transform a function to a bijective function. Bu...

In this paper, we propose a new stream cipher construction based on block cipher design principles. The main idea is to replace the building blocks used in block ciphers by equivalent stream cipher components. In order to illustrate this approach, we construct a very simple synchronous stream cipher which provides a lot of flexibility for hardware implementations, and seems to have a number of ...

A block cipher, which is an important cryptographic primitive, is a bijective mapping from {0, 1} to {0, 1} (N is called the block size), parameterized by a key. In the true random cipher, each key results in a distinct mapping, and every mapping is realized by some key—this is generally taken to be the ideal cipher model. We consider a fundamental block cipher architecture called a substitutio...