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Succinct Arguments for Bilinear Group Arithmetic: Practical Structure-Preserving Cryptography
NIZK short proofs
2019/8/30
In their celebrated work, Groth and Sahai [EUROCRYPT'08, SICOMP' 12] constructed non-interactive zero-knowledge (NIZK) proofs for general bilinear group arithmetic relations, which spawned the entire ...
PrivFL: Practical Privacy-preserving Federated Regressions on High-dimensional Data over Mobile Networks
Privacy-preserving computations Predictive analysis Federated learning
2019/8/30
Federated Learning (FL) enables a large number of users to jointly learn a shared machine learning (ML) model, coordinated by a centralized server, where the data is distributed across multiple device...
Practical Forgery Attacks on Limdolen and HERN
NIST lightweight cryptography standardization project AEAD Limdolen
2019/8/8
In this paper, we investigate the security of Limdolen and HERN which are Round 1 submissions of the ongoing NIST Lightweight Cryptography Standardization Project. We show that some non-conservative d...
HoneyBadgerMPC and AsynchroMix: Practical AsynchronousMPC and its Application to Anonymous Communication
multiparty computation robustness
2019/8/2
Multiparty computation as a service (MPSaaS) is a promising approach for building privacy-preserving communication systems.However, in this paper, we argue that existing MPC implementations are inadeq...
Lilliput-AE is a tweakable block cipher submitted as a candidate to the NIST lightweight cryptography standardization process. It is based upon the lightweight block cipher Lilliput, whose cryptanalys...
A Tale of Three Signatures: practical attack of ECDSA with wNAF
ECDSA lattice techniques cryptanalysis
2019/7/25
Attacking ECDSA with wNAF implementation for the scalar multiplication first requires some side channel analysis to collect information, then lattice based methods to recover the secret key. In this p...
Practical Attribute Based Inner Product Functional Encryption from Simple Assumptions
Functional Encryption Attribute Based Encryption Inner Product
2019/7/23
Functional encryption (FE) that bases on user attributes has many useful practical applications. For example, a company may only authorize department heads of other sections to query the average sale ...
Recently, an article by Felke appeared in Cryptography and Communications discussing the security of biquadratic C* and a further generalization, k-ary C*. The article derives lower bounds for the com...
More Practical Single-Trace Attacks on the Number Theoretic Transform
side-channel attacks post-quantum cryptography lattice-based cryptography
2019/7/15
Single-trace side-channel attacks are a considerable threat to implementations of classic public-key schemes. For lattice-based cryptography, however, this class of attacks is much less understood, an...
Exploiting Determinism in Lattice-based Signatures - Practical Fault Attacks on pqm4 Implementations of NIST candidates
Deterministic Lattice Signatures pqm4 Fault Attack
2019/7/8
In this paper, we analyze the implementation level fault vulnerabilities of deterministic lattice-based signature schemes. In particular, we extend the practicality of skip-addition fault attacks thro...
In this paper we investigate the security of 5-round AES against two different attacks in an adaptive setting. We present a practical key-recovery attack on 5-round AES with a secret s-box that requir...
Theoretical and Practical Approaches for Hardness Amplification of PUFs
Hardness Amplification Complexity Theory FPGA Security
2019/5/23
The era of PUFs has been characterized by the efforts put into research and the development of PUFs that are robust against attacks, in particular, machine learning (ML) attacks. In the lack of system...
Towards a Practical Clustering Analysis over Encrypted Data
clustering mean-shift homomorphic encryption, privacy
2019/5/13
Clustering analysis is one of the most significant unsupervised machine learning tasks, and it is utilized in various fields associated with privacy issue including bioinformatics, finance and image p...
A Practical Approach to the Secure Computation of the Moore-Penrose Pseudoinverse over the Rationals
secure linear algebra multiparty computation Moore-Penrose pseudoinverse
2019/5/13
We devise an efficient and data-oblivious algorithm for solving a bounded integral linear system of arbitrary rank over the rational numbers via the Moore-Penrose pseudoinverse, using finite-field ari...
Practical Key-recovery Attacks on Round-Reduced Ketje Jr, Xoodoo-AE and Xoodyak
Conditional Cube Attack Keccak Ketje Jr
2019/5/9
Conditional cube attack was proposed by Huang et al. at EUROCRYPT 2017 to attack Keccak keyed mode. Inspired by dynamic cube attack, they reduce the degree by appending key bit conditions on the initi...