SipHash is a family of pseudorandom functions optimized for short inputs. Target applications include network traffic authentication and hash-table lookups protected against hash-flooding denial-of-service attacks. SipHash is simpler than MACs based on universal hashing, and faster on short inputs. Compared to dedicated designs for hash-table lookup, SipHash has well-defined security goals and competitive performance. For example, SipHash processes a 16-byte input with a fresh key in 140 cycles on an AMD FX-8150 processor, which is much faster than state-of-the-art MACs. We propose that hash tables switch to SipHash as a hash function.

/pdf/siphash-a-fast-short-input-prf-4xnq8pi264.pdf

SipHash: a fast short-input PRF.

In this paper, we focus on the automatic differential cryptanalysis of ARX block ciphers with respect to XOR-difference, and develop Mouha et al.’s framework for finding differential characteristics by adding a new method to construct long characteristics from short ones. The new method reduces the searching time a lot and makes it possible to search differential characteristics for ARX block ciphers with large word sizes such as n = 48, 64. What’s more, we take the differential effect into consideration and find that the differential probability increases by a factor of 4 ∼ 16 for SPECK and about 2 for LEA when multiple characteristics are counted in. The efficiency of our method is demonstrated by improved attacks of SPECK and LEA, which attack 1, 1, 4 and 6 more rounds of SPECK48, SPECK64, SPECK96 and SPECK128, respectively, and 2 more rounds of LEA than previous works.

/pdf/automatic-differential-analysis-of-arx-block-ciphers-with-y1luli1qqm.pdf

Automatic Differential Analysis of ARX Block Ciphers with Application to SPECK and LEA.

https://hal.archives-ouvertes.fr/hal-02537540/document

Winter is here! A decade of cache-based side-channel attacks, detection & mitigation for RSA

Abstract Neural-aided cryptanalysis is a challenging topic, in which the neural distinguisher ($\mathcal{ND}$) is a core module. In this paper, we propose a new $\mathcal{ND}$ considering multiple ciphertext pairs simultaneously. Besides, multiple ciphertext pairs are constructed from different keys. The motivation is that the distinguishing accuracy can be improved by exploiting features derived from multiple ciphertext pairs. To verify this motivation, we have applied this new $\mathcal{ND}$ to five different ciphers. Experiments show that taking multiple ciphertext pairs as input indeed brings accuracy improvement. Then, we prove that our new $\mathcal{ND}$ applies to two different neural-aided key recovery attacks. Moreover, the accuracy improvement is helpful for reducing the data complexity of the neural-aided statistic attack. The code is available at https://github.com/AI-Lab-Y/ND_mc. 

OUP accepted manuscript

• A submitted manuscript is the author's version of the article upon submission and before peer-review. There can be important differences between the submitted version and the official published version of record. People interested in the research are advised to contact the author for the final version of the publication, or visit the DOI to the publisher's website. • The final author version and the galley proof are versions of the publication after peer review. • The final published version features the final layout of the paper including the volume, issue and page numbers.

https://pure.tue.nl/ws/files/58659703/20170316_Chuengsatiansup.pdf

Optimizing curve-based cryptography

Malicious Hashing: Eve's Variant of SHA-1.- Binary Elligator Squared.- Batch NFS.- An Improvement of Linear Cryptanalysis with Addition Operations with Applications to FEAL-8X.- Colliding Keys for SC2000-256.- Faster Binary-Field Multiplication and Faster Binary-Field MACs.- OMD: A Compression Function Mode of Operation for Authenticated Encryption.- Security Amplification for the Composition of Block Ciphers: Simpler Proofs and New Results.- Improved Differential Cryptanalysis of Round-Reduced Speck.- Differential Cryptanalysis of SipHash.- Weak Instances of PLWE.- The Usage of Counter Revisited: Second-Preimage Attack on New Russian Standardized Hash Function.- Side-Channel Analysis of Montgomery's Representation Randomization.- Practical Cryptanalysis of PAES.- Diffusion Matrices from Algebraic-Geometry Codes with Efficient SIMD Implementation.- Error-Tolerant Side-Channel Cube Attack Revisited.- A Generic Algorithm for Small Weight Discrete Logarithms in Composite Groups.- Linear Biases in AEGIS Keystream.- Chaskey: An Efficient MAC Algorithm for 32-bit Microcontrollers.- Fast Point Multiplication Algorithms for Binary Elliptic Curves with and Without Precomputation.- Partial Key Exposure Attacks on RSA: Achieving the Boneh-Durfee Bound.- Solving the Discrete Logarithm of a 113-bit Koblitz Curve with an FPGA Cluster.

Selected areas in cryptography SAC 2014 : 21st International Conference Montreal, QC, Canada, August 14-15, 2014 : revised selected papers

Block Cipher Cryptanalysis.- Improved DST Cryptanalysis of IDEA.- Improved Related-Key Impossible Differential Attacks on Reduced-Round AES-192.- Related-Key Rectangle Attack on the Full SHACAL-1.- Stream Cipher Cryptanalysis I.- Cryptanalysis of Achterbahn-Version 2.- Cryptanalysis of the Stream Cipher ABC v2.- The Design of a Stream Cipher LEX.- Dial C for Cipher.- Improved Security Analysis of XEX and LRW Modes.- Extended Hidden Number Problem and Its Cryptanalytic Applications.- Changing the Odds Against Masked Logic.- Advances on Access-Driven Cache Attacks on AES.- Blind Differential Cryptanalysis for Enhanced Power Attacks.- Efficient Implementations I.- Efficient Implementations of Multivariate Quadratic Systems.- Unbridle the Bit-Length of a Crypto-coprocessor with Montgomery Multiplication.- Delaying and Merging Operations in Scalar Multiplication: Applications to Curve-Based Cryptosystems.- Stream Cipher Cryptanalysis II.- On the Problem of Finding Linear Approximations and Cryptanalysis of Pomaranch Version 2.- Multi-pass Fast Correlation Attack on Stream Ciphers.- Crossword Puzzle Attack on NLS.- Invited Talk.- When Stream Cipher Analysis Meets Public-Key Cryptography.- Efficient Implementations II.- On Redundant ?-Adic Expansions and Non-adjacent Digit Sets.- Pairing Calculation on Supersingular Genus 2 Curves.- Efficient Divisor Class Halving on Genus Two Curves.- Message Authentication on 64-Bit Architectures.- Some Notes on the Security of the Timed Efficient Stream Loss-Tolerant Authentication Scheme.- Constructing an Ideal Hash Function from Weak Ideal Compression Functions.- Provably Good Codes for Hash Function Design.

Selected areas in cryptography : 13th International Workshop, SAC 2006, Montreal, Canada, August 17-18, 2006 : revised selected papers

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Selected areas in cryptography SAC 2014 : 21st International Conference Montreal, QC, Canada, August 14-15, 2014 : revised selected papers

Selected areas in cryptography : 13th International Workshop, SAC 2006, Montreal, Canada, August 17-18, 2006 : revised selected papers