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Electronic Colloquium on Computational Complexity

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Reports tagged with Non-malleable Commitment:
TR14-069 | 5th May 2014
Shashank Agrawal, Divya Gupta, Hemanta Maji, Omkant Pandey, Manoj Prabhakaran

Explicit Non-Malleable Codes Resistant to Permutations

The notion of non-malleable codes was introduced as a relaxation of standard error-correction and error-detection. Informally, a code is non-malleable if the message contained in a modified codeword is either the original message, or a completely unrelated value.

In the information theoretic setting, although existence of such codes for various ... more >>>

TR17-100 | 7th June 2017
Dakshita Khurana, Amit Sahai

How to Achieve Non-Malleability in One or Two Rounds

Despite over 25 years of research on non-malleable commitments in the plain model, their round complexity has remained open. The goal of achieving non-malleable commitment protocols with only one or two rounds has been especially elusive. Pass (TCC 2013, CC 2016) captured this difficulty by proving important impossibility results regarding ... more >>>

TR18-203 | 1st December 2018
Yael Kalai, Dakshita Khurana

Non-Interactive Non-Malleability from Quantum Supremacy

We construct non-interactive non-malleable commitments with respect to replacement, without setup in the plain model, under well-studied assumptions.

First, we construct non-interactive non-malleable commitments with respect to commitment for $\epsilon \log \log n$ tags for a small constant $\epsilon>0$, under the following assumptions:

- Sub-exponential hardness of factoring or discrete ... more >>>

TR21-117 | 11th August 2021
Divesh Aggarwal, Bhavana Kanukurthi, SaiLakshmiBhavana Obbattu, Maciej Obremski, Sruthi Sekar

Simplicity Meets Near-Optimal Rate: Non-malleable Codes and Non-malleable Two-source Extractors via Rate Boosters

Revisions: 3

At ITCS 2010, Dziembowski, Pietrzak, and Wichs introduced Non-malleable Codes (NMCs). Non-malleability is one of the strongest and most challenging notions of security considered in cryptography and protects against tampering attacks. In the context of coding schemes, non-malleability requires that it be infeasible to tamper the codeword of a message ... more >>>

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