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Statistical Witness Indistinguishability (and more) in Two Messages
statistical witness indistinguishability super-polynomial simulation statistical ZK ompressing interactive arguments
2018/3/6
Two-message witness indistinguishable protocols were first constructed by Dwork and Naor (FOCS 00). They have since proven extremely useful in the design of several cryptographic primitives. However, ...
Securing Abe's Mix-net Against Malicious Verifiers via Witness Indistinguishability
mix-nets witness indistinguishability Benes network
2017/6/9
We show that the simple and appealing unconditionally sound mix-net due to Abe (Asiacrypt'99) can be augmented to further guarantee anonymity against malicious verifiers. This additional guarantee imp...
Two-Message Witness Indistinguishability and Secure Computation in the Plain Model from New Assumptions
Zero knowledge Witness indistinguishability Super-polynomial simulation
2017/5/23
We study the feasibility of two-message protocols for secure two-party computation in the plain model, for functionalities that deliver output to one party, with security against malicious parties. Si...
ZAPs and Non-Interactive Witness Indistinguishability from Indistinguishability Obfuscation
ZAP NIZK Obfuscation NIWI
2016/1/23
Zero-knowledge proofs [GMR89] and their feasibility for NP [GMW91] are fundamental to modern cryptography, allowing to prove any NP statement while guaranteeing total privacy of the witness. One of ...