85 citations · 141 across the 15 of their papers we have counts for
16 papers
Multi-Copy Security in Quantum Cryptography and More
Alper Çakan, Vipul Goyal, Fuyuki Kitagawa +2
Unclonable cryptography uses the quantum no-cloning principle to achieve security guarantees that are impossible in a classical world. Most existing works, however, consider only s…
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…
Public-Key Quantum Fire and Key-Fire From Classical Oracles
Alper Çakan, Vipul Goyal, Omri Shmueli
Quantum fire is a distribution of quantum states that can be efficiently cloned, but cannot be efficiently converted into a classical string. First considered by Nehoran and Zhandr…
Anonymous Public-Key Quantum Money and Quantum Voting
Alper Cakan, Vipul Goyal, Takashi Yamakawa
Quantum information allows us to build quantum money schemes, where a bank can issue banknotes in the form of authenticatable quantum states that cannot be cloned or counterfeited.…
Unclonable Secret Sharing
Prabhanjan Ananth, Vipul Goyal, Jiahui Liu +1
Unclonable cryptography utilizes the principles of quantum mechanics to addresses cryptographic tasks that are impossible classically. We introduce a novel unclonable primitive in…
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…
Computational Quantum Secret Sharing
Alper Çakan, Vipul Goyal, Chen-Da Liu-Zhang +1
Quantum secret sharing (QSS) allows a dealer to distribute a secret quantum state among a set of parties so that certain subsets can reconstruct the secret, while unauthorized subs…
Post-Quantum Multi-Party Computation
Amit Agarwal, James Bartusek, Vipul Goyal +2
We initiate the study of multi-party computation for classical functionalities (in the plain model) with security against malicious polynomial-time quantum adversaries. We observe…
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…
Position-Based Quantum Cryptography: Impossibility and Constructions
Harry Buhrman, Nishanth Chandran, Serge Fehr +4
In this work, we study position-based cryptography in the quantum setting. The aim is to use the geographical position of a party as its only credential. On the negative side, we s…
Position-Based Quantum Cryptography
Nishanth Chandran, Serge Fehr, Ran Gelles +2
This paper is replaced by arXiv:1009.2490. The new paper includes a general impossibility result and restricted possibility results, and it has two additional authors.
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…