Schneider, Thomas ; Yalame, Hossein ; Yonli, Michael (2023)
Griffin: Towards mixed multi-key homomorphic encryption.
20th International Conference on Security and Cryptography (SECRYPT'23). Rome, Italy (10.-12.07.2023)
doi: 10.5220/0012090200003555
Konferenzveröffentlichung, Bibliographie
Kurzbeschreibung (Abstract)
This paper presents Griffin, an extension of the mixed-scheme single-key homomorphic encryption framework Pegasus (Lu et al., IEEE S&P’21) to a Multi-Key Homomorphic Encryption (MKHE) scheme with applications to secure computation. MKHE is a generalized notion of Homomorphic Encryption (HE) that allows for operations on ciphertexts encrypted under different keys. However, an efficient approach to evaluate both polynomial and non-polynomial functions on encrypted data in MKHE has not yet been developed, hindering the deployment of HE to real-life applications. Griffin addresses this challenge by introducing a method for transforming between MKHE ciphertexts of different schemes. The practicality of Griffin is demonstrated through benchmarks with multiple applications, including the sorting of sixty four 45-bit fixed point numbers with a precision of 7 bits in 21 minutes, and evaluating arbitrary functions with a one-time setup communication of 1.4 GB per party and 2.34 MB per ciphertext. Moreover, Griffin could compute the maximum of two numbers in 3.2 seconds, a 2× improvement over existing MKHE approaches that rely on a single scheme.
| Typ des Eintrags: | Konferenzveröffentlichung |
|---|---|
| Erschienen: | 2023 |
| Autor(en): | Schneider, Thomas ; Yalame, Hossein ; Yonli, Michael |
| Art des Eintrags: | Bibliographie |
| Titel: | Griffin: Towards mixed multi-key homomorphic encryption |
| Sprache: | Englisch |
| Publikationsjahr: | 10 Juli 2023 |
| Verlag: | SciTePress |
| Buchtitel: | Proceedings of the 20th International Conference on Security and Cryptography - SECRYPT |
| Veranstaltungstitel: | 20th International Conference on Security and Cryptography (SECRYPT'23) |
| Veranstaltungsort: | Rome, Italy |
| Veranstaltungsdatum: | 10.-12.07.2023 |
| DOI: | 10.5220/0012090200003555 |
| URL / URN: | https://www.scitepress.org/PublicationsDetail.aspx?ID=fcXc4q... |
| Zugehörige Links: | |
| Kurzbeschreibung (Abstract): | This paper presents Griffin, an extension of the mixed-scheme single-key homomorphic encryption framework Pegasus (Lu et al., IEEE S&P’21) to a Multi-Key Homomorphic Encryption (MKHE) scheme with applications to secure computation. MKHE is a generalized notion of Homomorphic Encryption (HE) that allows for operations on ciphertexts encrypted under different keys. However, an efficient approach to evaluate both polynomial and non-polynomial functions on encrypted data in MKHE has not yet been developed, hindering the deployment of HE to real-life applications. Griffin addresses this challenge by introducing a method for transforming between MKHE ciphertexts of different schemes. The practicality of Griffin is demonstrated through benchmarks with multiple applications, including the sorting of sixty four 45-bit fixed point numbers with a precision of 7 bits in 21 minutes, and evaluating arbitrary functions with a one-time setup communication of 1.4 GB per party and 2.34 MB per ciphertext. Moreover, Griffin could compute the maximum of two numbers in 3.2 seconds, a 2× improvement over existing MKHE approaches that rely on a single scheme. |
| Freie Schlagworte: | Engineering, E4, CYSEC, GRK Privacy&Trust for Mobile Users (Project A.1) |
| Zusätzliche Informationen: | Vol.1 |
| Fachbereich(e)/-gebiet(e): | 20 Fachbereich Informatik 20 Fachbereich Informatik > Praktische Kryptographie und Privatheit 20 Fachbereich Informatik > Kryptographische Protokolle DFG-Sonderforschungsbereiche (inkl. Transregio) DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche DFG-Graduiertenkollegs DFG-Graduiertenkollegs > Graduiertenkolleg 2050 Privacy and Trust for Mobile Users Profilbereiche Profilbereiche > Cybersicherheit (CYSEC) DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche > SFB 1119: CROSSING – Kryptographiebasierte Sicherheitslösungen als Grundlage für Vertrauen in heutigen und zukünftigen IT-Systemen |
| Hinterlegungsdatum: | 28 Sep 2023 13:41 |
| Letzte Änderung: | 28 Sep 2023 13:41 |
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