Differential cryptanalysis of the data encryption standard
Differential cryptanalysis of the data encryption standard
Linear cryptanalysis method for DES cipher
EUROCRYPT '93 Workshop on the theory and application of cryptographic techniques on Advances in cryptology
Differential Cryptanalysis of DES-like Cryptosystems
CRYPTO '90 Proceedings of the 10th Annual International Cryptology Conference on Advances in Cryptology
On the Classification of 4 Bit S-Boxes
WAIFI '07 Proceedings of the 1st international workshop on Arithmetic of Finite Fields
Cube Attacks on Tweakable Black Box Polynomials
EUROCRYPT '09 Proceedings of the 28th Annual International Conference on Advances in Cryptology: the Theory and Applications of Cryptographic Techniques
KATAN and KTANTAN -- A Family of Small and Efficient Hardware-Oriented Block Ciphers
CHES '09 Proceedings of the 11th International Workshop on Cryptographic Hardware and Embedded Systems
Hummingbird: ultra-lightweight cryptography for resource-constrained devices
FC'10 Proceedings of the 14th international conference on Financial cryptograpy and data security
Cryptanalysis of Hummingbird-1
FSE'11 Proceedings of the 18th international conference on Fast software encryption
Cryptographic analysis of all 4 × 4-bit s-boxes
SAC'11 Proceedings of the 18th international conference on Selected Areas in Cryptography
SP 800-38D. Recommendation for Block Cipher Modes of Operation: Galois/Counter Mode (GCM) and GMAC
SP 800-38D. Recommendation for Block Cipher Modes of Operation: Galois/Counter Mode (GCM) and GMAC
Cryptographic analysis of all 4 × 4-bit s-boxes
SAC'11 Proceedings of the 18th international conference on Selected Areas in Cryptography
Practical attack on 8 rounds of the lightweight block cipher KLEIN
INDOCRYPT'11 Proceedings of the 12th international conference on Cryptology in India
On the security of hummingbird-2 against side channel cube attacks
WEWoRC'11 Proceedings of the 4th Western European conference on Research in Cryptology
High speed implementation of authenticated encryption for the MSP430X microcontroller
LATINCRYPT'12 Proceedings of the 2nd international conference on Cryptology and Information Security in Latin America
FSE'12 Proceedings of the 19th international conference on Fast Software Encryption
Design space exploration of the lightweight stream cipher WG-8 for FPGAs and ASICs
Proceedings of the Workshop on Embedded Systems Security
FIDES: lightweight authenticated cipher with side-channel resistance for constrained hardware
CHES'13 Proceedings of the 15th international conference on Cryptographic Hardware and Embedded Systems
Improbable differential attacks on Present using undisturbed bits
Journal of Computational and Applied Mathematics
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Hummingbird-2 is an encryption algorithm with a 128-bit secret key and a 64-bit initialization vector. Hummingbird-2 optionally produces an authentication tag for each message processed. Like it's predecessor Hummingbird-1, Hummingbird-2 has been targeted for low-end microcontrollers and for hardware implementation in lightweight devices such as RFID tags and wireless sensors. Compared to the previous version of the cipher, and in response to extensive analysis, the internal state has been increased to 128 bits and a flow of entropy from the state to the mixing function has been improved. In this paper we present the Hummingbird-2 algorithm, its design and security arguments, performance analysis on both software and hardware platforms, and timing analysis in relation to the ISO 18000-6C protocol.