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Optimizing Implementations of Linear Layers

期刊: IACR TRANSACTIONS ON SYMMETRIC CRYPTOLOGY, 2020; 2020 (2)

In this paper, we propose a new heuristic algorithm to search efficient implementations (in terms of XOR count) of linear layers used in symmetric-key......

Improved Security Bounds for Generalized Feistel Networks

期刊: IACR TRANSACTIONS ON SYMMETRIC CRYPTOLOGY, 2020; 2020 (1)

We revisit the security of various generalized Feistel networks. Concretely, for unbalanced, alternating, type-1, type-2, and type-3 Feistel networks ......

Finding Bit-Based Division Property for Ciphers with Complex Linear Layers

期刊: IACR TRANSACTIONS ON SYMMETRIC CRYPTOLOGY, 2020; 2020 (1)

The bit-based division property (BDP) is the most effective technique for finding integral characteristics of symmetric ciphers. Recently, automatic s......

Links between Division Property and Other Cube Attack Variants

期刊: IACR TRANSACTIONS ON SYMMETRIC CRYPTOLOGY, 2020; 2020 (1)

A theoretically reliable key-recovery attack should evaluate not only the non-randomness for the correct key guess but also the randomness for the wro......

Spook: Sponge-Based Leakage-Resistant Authenticated Encryption with a Masked Tweakable Block Cipher

期刊: IACR TRANSACTIONS ON SYMMETRIC CRYPTOLOGY, 2020; 2020 ()

This paper defines Spook: a sponge-based authenticated encryption with associated data algorithm. It is primarily designed to provide security against......

Towards Low-Energy Leakage-Resistant Authenticated Encryption from the Duplex Sponge Construction

期刊: IACR TRANSACTIONS ON SYMMETRIC CRYPTOLOGY, 2020; 2020 (1)

The ongoing NIST lightweight cryptography standardization process highlights the importance of resistance to side-channel attacks, which has renewed t......

Beyond-Birthday-Bound Security for 4-round Linear Substitution-Permutation Networks

期刊: IACR TRANSACTIONS ON SYMMETRIC CRYPTOLOGY, 2020; 2020 (3)

Recent works of Cogliati et al. (CRYPTO 2018) have initiated provable treatments of Substitution-Permutation Networks (SPNs), one of the most popular ......

Exploring Secret Keys in Searching Integral Distinguishers Based on Division Property

期刊: IACR TRANSACTIONS ON SYMMETRIC CRYPTOLOGY, 2020; 2020 (3)

Division property proposed by Todo at EUROCRYPT 2015 is a generalized integral property. Then, conventional bit-based division property (CBDP) and bit......

On the Usage of Deterministic (Related-Key) Truncated Differentials and Multidimensional Linear Approximations for SPN Ciphers

期刊: IACR TRANSACTIONS ON SYMMETRIC CRYPTOLOGY, 2020; 2020 (3)

Among the few works realising the search of truncated differentials (TD) and multidimensional linear approximations (MDLA) holding for sure, the optim......

On the Security Margin of TinyJAMBU with Refined Differential and Linear Cryptanalysis

期刊: IACR TRANSACTIONS ON SYMMETRIC CRYPTOLOGY, 2020; 2020 (3)

This paper presents the first third-party security analysis of TinyJAMBU, which is one of 32 second-round candidates in NIST's lightweight cryptograph......

Differential Attacks on CRAFT Exploiting the Involutory S-boxes and Tweak Additions

期刊: IACR TRANSACTIONS ON SYMMETRIC CRYPTOLOGY, 2020; 2020 (3)

CRAFT is a lightweight tweakable block cipher proposed at FSE 2019, which allows countermeasures against Differential Fault Attacks to be integrated i......

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