Stream cipher is an important branch of symmetric cryptosystems, which takes obvious
advantages in speed and scale of hardware implementation. It is suitable for using in the …

A classical construction of stream ciphers is to combine several LFSRs and a highly non-
linear Boolean function f. Their security is usually analysed in terms of correlation attacks …

A new stream cipher, Grain, is proposed. The design targets hardware environments where
gate count, power consumption and memory is very limited. It is based on two shift registers …

Poly1305-AES is a state-of-the-art message-authentication code suitable for a wide variety
of applications. Poly1305-AES computes a 16-byte authenticator of a variable-length …

In typical applications of homomorphic encryption, the first step consists for Alice of
encrypting some plaintext m under Bob's public key pk pk and of sending the ciphertext c …

A new version of the stream cipher Grain-128 is proposed. The new version, Grain-128a, is
strengthened against all known attacks and observations on the original Grain-128, and has …

A new stream cipher, Grain-128, is proposed. The design is very small in hardware and it
targets environments with very limited resources in gate count, power consumption, and chip …

In this paper we present a very practical ciphertext-only cryptanalysis of GSM encrypted
communication, and various active attacks on the GSM protocols. These attacks can even …

A new family of stream ciphers, Grain, is proposed. Two variants, a 80-bit and a 128-bit
variant are specified, denoted Grain and Grain-128 respectively. The designs target …

The question “Stream ciphers: dead or alive?” was posed by Adi Shamir. Intended to
provoke debate, the question could not have been better, or more starkly, put. However, it …