85 citations · 141 across the 15 of their papers we have counts for
8 papers · 1 filter
How to Copy-Protect Malleable-Puncturable Cryptographic Functionalities Under Arbitrary Challenge Distributions
Alper Çakan, Vipul Goyal
A quantum copy-protection scheme (Aaronson, CCC 2009) encodes a functionality into a quantum state such that given this state, no efficient adversary can create two (possibly entan…
Unclonable Cryptography with Unbounded Collusions and Impossibility of Hyperefficient Shadow Tomography
Alper Çakan, Vipul Goyal
Quantum no-cloning theorem gives rise to the intriguing possibility of quantum copy protection where we encode a program or functionality in a quantum state such that a user in pos…
Quantum Key Leasing for PKE and FHE with a Classical Lessor
Orestis Chardouvelis, Vipul Goyal, Aayush Jain +1
In this work, we consider the problem of secure key leasing, also known as revocable cryptography (Agarwal et. al. Eurocrypt' 23, Ananth et. al. TCC' 23), as a strengthened securit…
Split-State Non-Malleable Codes and Secret Sharing Schemes for Quantum Messages
Naresh Goud Boddu, Vipul Goyal, Rahul Jain +1
Non-malleable codes are fundamental objects at the intersection of cryptography and coding theory. These codes provide security guarantees even in settings where error correction a…
Talek: Private Group Messaging with Hidden Access Patterns
Raymond Cheng, William Scott, Elisaweta Masserova +5
Talek is a private group messaging system that sends messages through potentially untrustworthy servers, while hiding both data content and the communication patterns among its use…
Non-Malleable Extractors and Codes, with their Many Tampered Extensions
Eshan Chattopadhyay, Vipul Goyal, Xin Li
Randomness extractors and error correcting codes are fundamental objects in computer science. Recently, there have been several natural generalizations of these objects, in the con…
CompChall: Addressing Password Guessing Attacks
Vipul Goyal, Virendra Kumar, Mayank Singh +2
Even though passwords are the most convenient means of authentication, they bring along themselves the threat of dictionary attacks. Dictionary attacks may be of two kinds: online…
Vcache: Caching Dynamic Documents
Vipul Goyal, Sugata Sanyal, Dharma P. Agrawal
The traditional web caching is currently limited to static documents only. A page generated on the fly from a server side script may have different contents on different accesses a…