Authenticated encryption

About: Authenticated encryption is a research topic. Over the lifetime, 1328 publications have been published within this topic receiving 25968 citations. The topic is also known as: AEAD & Authenticated Encryption with Associated Data.

An AES-GCM authenticated encryption crypto-core for IoT security

Abstract: This paper describes a design of AES-GCM authenticated encryption (AE) crypto-core suitable for IoT security applications. The AES-GCM core provides confidentiality by Counter (CTR) mode of block cipher AES, and it also provides integrity and authenticity by GHASH. AES encryption supports two key lengths of supports key length of 128 and 256-bit. In order to optimize the overall performance, GHASH block was designed to perform Galois field multiplication in 11 clock cycles, resulting in the number of clock cycles between AES encryption and Galois field multiplication are matched. The AES-GCM core was verified by FPGA implementation, and it occupies 35,352 gate equivalents (GEs). The estimated throughput is 332 Mbps with maximum clock frequency of 140 MHz.

Finding state collisions in the authenticated encryption stream cipher ACORN

Abstract: This paper analyzes the authenticated encryption algorithm ACORN, a candidate in the CAESAR cryptographic competition. We identify weaknesses in the state update function of ACORN which result in collisions in the internal state of ACORN. This paper shows that for a given set of key and initialization vector values we can construct two distinct input messages which result in a collision in the ACORN internal state. Using a standard PC the collision can be found almost instantly when the secret key is known. This flaw can be used by a message sender to create a forged message which will be accepted as legitimate.

FELICS-AEAD: Benchmarking of Lightweight Authenticated Encryption Algorithms

Abstract: Cryptographic algorithms that can simultaneously provide both encryption and authentication play an increasingly important role in modern security architectures and protocols (e.g. TLS v1.3). Dozens of authenticated encryption systems have been designed in the past five years, which has initiated a large body of research in cryptanalysis. The interest in authenticated encryption has further risen after the National Institute of Standards and Technology (NIST) announced an initiative to standardize “lightweight” authenticated ciphers and hash functions that are suitable for resource-constrained devices. However, while there already exist some cryptanalytic results on these recent designs, little is known about their performance, especially when they are executed on small 8, 16, and 32-bit microcontrollers. In this paper, we introduce an open-source benchmarking tool suite for a fair and consistent evaluation of Authenticated Encryption with Associated Data (AEAD) algorithms written in C or assembly language for 8-bit AVR, 16-bit MSP430, and 32-bit ARM Cortex-M3 platforms. The tool suite is an extension of the FELICS benchmarking framework and provides a new AEAD-specific low-level API that allows users to collect very fine-grained and detailed results for execution time, RAM consumption, and binary code size in a highly automated fashion. FELICS-AEAD comes with two pre-defined evaluation scenarios, which were developed to resemble security-critical operations commonly carried out by real IoT applications to ensure the benchmarks are meaningful in practice. We tested the AEAD tool suite using five authenticated encryption algorithms, namely AES-GCM and the CAESAR candidates ACORN, ASCON, Ketje-Jr, and NORX, and present some preliminary results.