Abstract
A garbling scheme is a fundamental cryptographic building block with a long list of applications. The study of different techniques for garbling a function, towards optimizing computation and communication complexity, has been an area of active research. Most common garbling techniques work by representing each gate in the circuit as a set of ciphertexts that encrypt its truth table row-by-row. In this work we present a new garbling scheme in the random oracle (RO) model that garbles circuits in the gate-by-gate paradigm by capturing the gate functionality (AND, XOR ) as a whole rather than as a set of ciphertexts. The final gate garbling requires 4 κ bits of communication in expectation, 4 RO calls for garbling and 1 RO call for evaluation. We prove that the scheme satisfies privacy in the non-programmable random oracle model and against PPT adversaries. We also show how this scheme can be extended to support free-XOR and garble any gate functionality over binary inputs.
Original language | English |
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Title of host publication | Applied Cryptography and Network Security - 21st International Conference, ACNS 2023, Proceedings |
Editors | Mehdi Tibouchi, XiaoFeng Wang |
Publisher | Springer Science and Business Media Deutschland GmbH |
Pages | 611-641 |
Number of pages | 31 |
ISBN (Print) | 9783031334900 |
DOIs | |
State | Published - 2023 |
Event | 21st International Conference on Applied Cryptography and Network Security, ACNS 2023 - Kyoto, Japan Duration: 19 Jun 2023 → 22 Jun 2023 |
Publication series
Name | Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) |
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Volume | 13906 LNCS |
ISSN (Print) | 0302-9743 |
ISSN (Electronic) | 1611-3349 |
Conference
Conference | 21st International Conference on Applied Cryptography and Network Security, ACNS 2023 |
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Country/Territory | Japan |
City | Kyoto |
Period | 19/06/23 → 22/06/23 |
Bibliographical note
Publisher Copyright:© 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.
Keywords
- Garbled Circuits
- Gate-by-Gate Garbling
- Random Oracles