25 Result(s)
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Chapter and Conference Paper
Format-Preserving Encryption
Format-preserving encryption (FPE) encrypts a plaintext of some specified format into a ciphertext of identical format—for example, encrypting a valid credit-card number into a valid credit-card number. The pr...
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Chapter and Conference Paper
Deterministic Encryption: Definitional Equivalences and Constructions without Random Oracles
We strengthen the foundations of deterministic public-key encryption via definitional equivalences and standard-model constructs based on general assumptions. Specifically we consider seven notions of privacy ...
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Chapter and Conference Paper
How to Build a Hash Function from Any Collision-Resistant Function
Recent collision-finding attacks against hash functions such as MD5 and SHA-1 motivate the use of provably collision-resistant (CR) functions in their place. Finding a collision in a provably CR function implies ...
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Chapter and Conference Paper
The Power of Proofs-of-Possession: Securing Multiparty Signatures against Rogue-Key Attacks
Multiparty signature protocols need protection against rogue-key attacks, made possible whenever an adversary can choose its public key(s) arbitrarily. For many schemes, provable security has only been establishe...
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Chapter and Conference Paper
Multi-Property-Preserving Hash Domain Extension and the EMD Transform
We point out that the seemingly strong pseudorandom oracle preserving (PRO-Pr) property of hash function domain-extension transforms defined and implemented by Coron et. al. [1] can actually weaken our guarantees...
