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Security Reductions for White-Box Key-Storage in Mobile Payments
White-box cryptography secure key storage hardware-binding
2019/9/16
The goal of white-box cryptography is to provide security even when the cryptographic implementation is executed in adversarially controlled environments. White-box implementations nowadays appear in ...
In order to study the resistance of a block cipher against boomerang attacks, a tool called the Boomerang Connectivity Table (BCT) for S-boxes was recently introduced. Very little is known today about...
Table Redundancy Method for Protecting against Differential Fault Analysis in the White-box Cryptography
Differential fault analysis white-box cryptography countermeasure
2019/8/26
Differential Fault Analysis (DFA) intentionally injects some fault into the encryption process and analyzes a secret key from the mathematical relationship between faulty and fault-free ciphertexts. E...
A Coin-Free Oracle-Based Augmented Black Box Framework
Black Box Construction Zero-Knowledge Proof NIZK
2019/7/25
After the work of Impagliazzo and Rudich (STOC, 1989), the black box framework has become one of the main research domain of cryptography. However black box techniques say nothing about non-black box ...
Mixture Integral Attacks on Reduced-Round AES with a Known/Secret S-Box
AES Mixture Differential Cryptanalysis Secret-Key Distinguisher
2019/7/8
The starting point of our work is “Mixture Differential Cryptanalysis” recently introduced at FSE/ToSC 2019, a way to turn the “multiple-of-8” 5-round AES secret-key distinguisher presented at Eurocry...
Black-Box Language Extension of Non-Interactive Zero-Knowledge Arguments
NIZK USS-NIZK black-box construction
2019/6/13
Highly efficient non-interactive zero-knowledge arguments (NIZK) are often constructed for limited languages and it is not known how to extend them to cover wider classes of languages in general. In t...
On the Complexity of Collision Resistant Hash Functions: New and Old Black-Box Separations
Collision Resistance Statistical Zero Knowledge Black box separations
2019/6/12
The complexity of collision-resistant hash functions has been long studied in the theory of cryptography. While we often think about them as a Minicrypt primitive, black-box separations demonstrate th...
Simple Yet Efficient Knowledge-Sound and Non-Black-Box Any-Simulation-Extractable ZK-SNARKs
NIZK QAP QSP
2019/6/4
Motivated by applications like verifiable computation and privacy-preserving cryptocurrencies, many efficient pairing-based SNARKs were recently proposed. However, the most efficient SNARKs like the o...
Anomalies and Vector Space Search: Tools for S-Box Reverse-Engineering
Reverse-engineering Vector space search BCT
2019/5/21
S-boxes are functions with an input so small that the simplest way to specify them is their lookup table (LUT). Unfortunately, some algorithm designers exploit this fact to avoid providing the algorit...
Motivated by the quest for scalable and succinct zero knowledge arguments, we revisit worst-case-to-average-case reductions for linear spaces, raised by [Rothblum, Vadhan, Wigderson, STOC 2013]. The p...
Doubly half-injective PRGs for incompressible white-box cryptography
White-box cryptography Incompressibility One-way permutations
2019/4/1
White-box cryptography was originally introduced in the setting of digital rights management with the goal of preventing a user from illegally re-distributing their software decryption program. In rec...
Ever since the first candidate white-box implementations by Chow et al. in 2002, producing a secure white-box implementation of AES has remained an enduring challenge. Following the footsteps of the o...
Analysis and Improvement of Differential Computation Attacks against Internally-Encoded White-Box Implementations
white-box cryptography internal encoding differential computation analysis
2019/1/29
White-box cryptography is the last security barrier for a cryptographic software implementation deployed in an untrusted environment. The principle of internal encodings is a commonly used white-box t...
STP Models of Optimal Differential and Linear Trail for S-box Based Ciphers
STP Differential trail Linear trail
2019/1/16
Automatic tools have played an important role in designing new cryptographic primitives and evaluating the security of ciphers. Simple Theorem Prover constraint solver (STP) has been used to search fo...
In this paper we study the problem of recovering a secret S-box from its difference distribution table (DDT). While being an interesting theoretical problem on its own, the ability to recover the S-bo...