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An emerging trend is for researchers to identify cryptography primitives for which feasibility was first established under obfuscation and then move the realization to a different setting. In this wor...
Witness pseudorandom functions (witness PRFs), introduced by Zhandry [Zha16], was defined for an NP language L and generate a pseudorandom value for any instance x. The same pseudorandom value can be ...
A witness encryption (WE) scheme can take any NP statement as a public-key and use it to encrypt a message. If the statement is true then it is possible to decrypt the message given a corresponding wi...
Over the last few years a new breed of cryptographic primitives has arisen: on one hand they have previously unimagined utility and on the other hand they are not based on simple to state and tried ou...
Witness encryption was proposed by Garg, Gentry, Sahai, and Waters as a means to encrypt to an instance, x, of an NP language and produce a ciphertext. In such a system, any decryptor that knows of ...
We propose a new time-release protocol based on the bitcoin protocol and witness encryption. We derive a ``public key'' from the bitcoin block chain for encryption. The decryption key are the unpredic...
Witness encryption (WE) was introduced by Garg et al. (STOC’13). A WE scheme is defined for some NP language L and lets a sender encrypt messages relative to instances x. A ciphertext for x can be d...
Witness encryption (WE) is a recent powerful encryption paradigm. It greatly extends the scope of encryption as it allows to encrypt a message using the description of a hard problem (a word in some...
We put forth the concept of \emph{witness encryption}. A witness encryption scheme is defined for an NP language $L$ (with corresponding witness relation $R$). In such a scheme, a user can encrypt a m...
The notion of differing-inputs obfuscation (diO) was introduced by Barak et al. (CRYPTO 2001). It guarantees that, for any two circuits $C_0, C_1$, if it is difficult to come up with an input $x$ on w...
This paper defines adaptive soundness (AS) security for witness encryption and applies it to provide the first non-invasive schemes for asymmetric password-based encryption (A-PBE). A-PBE offers signi...

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