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Hash combiners are a practical way to make cryptographic hash functions more tolerant to future attacks and compatible with existing infrastructure. A combiner combines two or more hash functions in a...
Combiners for Backdoored Random Oracles
random oracle combiner communication complexity set- disjointness
2018/8/28
We formulate and study the security of cryptographic hash functions in the backdoored random-oracle (BRO) model, whereby a big brother designs a "good" hash function, but can also see arbitrary functi...
Functional encryption (FE) has incredible applications towards computing on encrypted data. However, constructing the most general form of this primitive has remained elusive. Although some candidate ...
Key-encapsulation mechanisms (KEMs) are a common stepping stone for constructing public-key encryption. Secure KEMs can be built from diverse assumptions, including ones related to integer factorizati...
Correlations Between (Nonlinear) Combiners of Input and Output of Random Functions and Permutations
correlation uniform random function uniform random permutation
2017/12/25
Daeman and Rijmen had derived the distributions of correlations between linear combinations of the input and output of uniform random functions and uniform random permutations. We generalise their res...
Resource-efficient OT combiners with active security
oblivious transfer combiners secret sharing
2017/6/9
An OT-combiner takes nn implementations of the oblivious transfer (OT) functionality, some of which may be faulty, and produces a secure instance of oblivious transfer as long as a large enough number...
Functional Graph Revisited: Updates on (Second) Preimage Attacks on Hash Combiners
Hash Combiner Functional Graph XOR Combiner
2017/6/8
Functional Graph Revisited: Updates on (Second) Preimage Attacks on Hash Combiners.
Encryptor Combiners: A Unified Approach to Multiparty NIKE, (H)IBE, and Broadcast Encryption
multiparty NIKE (H)IBE broadcast encryption
2017/2/23
We define the concept of an encryptor combiner. Roughly, such a combiner takes as input n public keys for a public key encryption scheme, and produces a new combined public key. Anyone knowing a secre...
Robust Transforming Combiners from Indistinguishability Obfuscation to Functional Encryption
Indistinguishability Obfuscation Universal Constructions Correctness Amplifiers
2017/2/20
Indistinguishability Obfuscation (iO) has enabled an incredible number of new and exciting applications. However, our understanding of how to actually build secure iO remains in its infancy. While man...
Robust Multi-Property Combiners for Hash Functions
hash functions robust combiner indifferentiability
2016/7/28
A robust combiner for hash functions takes two candidate implementations and constructs a hash function which is secure as long as at least one of the candidates is secure. So far, hash function combi...
Obfuscation is challenging; we currently have practical candidates with rather vague security guarantees on the one side, and theoretical constructions which have recently experienced jeopardizing att...
New Attacks on the Concatenation and XOR Hash Combiners
Hash function cryptanalysis concatenation combiner
2016/2/23
We study the security of the concatenation combiner H1(M)kH2(M)
for two independent iterated hash functions with n-bit outputs that are
built using the Merkle-Damgⅹard construction. In 2004 Joux sho...
A Unified MGF-Based Capacity Analysis of Diversity Combiners over Generalized Fading Channels
Unified MGF-Based Capacity Analysis Diversity Combiners Generalized Fading Channels
2011/1/21
Unified exact average capacity results for L-branch coherent diversity receivers including equal-gain combining (EGC) and maximal-ratio combining (MRC) are not known. This paper develops a novel gener...
A Unified MGF-Based Capacity Analysis of Diversity Combiners over Generalized Fading Channels
MGF-Based Capacity Analysis Diversity Combiners Generalized Fading Channels
2011/1/4
Unified exact average capacity results for L-branch coherent diversity receivers including equal-gain combining (EGC) and maximal-ratio combining (MRC) are not known. This paper develops a novel gener...
A Unified MGF-Based Capacity Analysis of Diversity Combiners over Generalized Fading Channels
Information Theory (cs.IT) Statistics Theory (math.ST) Other Statistics (stat.OT)
2010/12/17
Unified exact average capacity results for L-branch coherent diversity receivers including equal-gain combining (EGC) and maximal-ratio combining (MRC) are not known. This paper develops a novel gener...