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Thwarting Leakage Abuse Attacks against Searchable Encryption -- A Formal Approach and Applications to Database Padding
security definition searchable encryption leakage abuse attacks
2017/11/1
After the development of practical searchable encryption constructions, allowing for secure searches over an encrypted dataset outsourced to an untrusted server, at the expense of leaking some informa...
On the Regularity of Lossy RSA: Improved Bounds and Applications to Padding-Based Encryption
PKCS Phi-Hiding Regularity
2016/1/5
We provide new bounds on how close to regular the map x |--> x^e is on arithmetic progressions in Z_N, assuming e | Phi(N) and N is composite. We use these bounds to analyze the security of natural cr...
Universal Computational Extractors and the Superfluous Padding Assumption for Indistinguishability Obfuscation
Universal computational extractors standard model superfluous padding assumption
2015/12/29
Universal Computational Extractors (UCEs), introduced by Bellare, Hoang and Keelveedhi
(CRYPTO 2013), are a framework of assumptions on hash functions that allow to instantiate random
oracles in a l...
We show that the common proof technique of padding a circuit before IO obfuscation is sometimes necessary. That is, assuming indistinguishability obfuscation (IO) and one-way functions exist, we defin...
It is well-known that, due to the homomorphic properties of the RSA function, textbook RSA signatures are insecure, and a common workaround is to encode messages with a so-called padding function mu b...
Characterizing Padding Rules of MD Hash Functions Preserving Collision Security
MD hash function padding rule suffix-free
2009/7/14
This paper characterizes collision preserving padding rules and provides variants
of Merkle-Damgard (MD) which are having less or no overhead costs due to length. We rst
show that sux-free proper...
Efficient Universal Padding Schemes for Multiplicative Trapdoor One-way Permutation
Efficient Universal Padding Schemes Multiplicative Trapdoor One-way Permutation
2009/3/20
Efficient Universal Padding Schemes for Multiplicative Trapdoor One-way Permutation