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On Access Control Encryption Without Sanitization
Publikation: Bidrag til bog/antologi/rapport/proceeding › Konferencebidrag i proceedings › Forskning › peer review
DOI
- https://doi.org/10.1007/978-3-031-14791-3_10
Forlagets udgivne version
- Cecilia Boschini, Technion and Reichman University ,
- Ivan Damgård
- Claudio Orlandi
Access Control Encryption (ACE) [4] allows to control information flow between parties by enforcing a policy that specifies which user can send messages to whom. The core of the scheme is a sanitizer, i.e., an entity that “sanitizes” all messages by essentially re-encrypting the ciphertexts under its key. In this work we investigate the natural question of whether it is still possible to achieve some meaningful security properties in scenarios when such a sanitization step is not possible. We answer positively by showing that it is possible to limit corrupted users to communicate only through insecure subliminal channels, under the necessary assumption that parties do not have pre-shared randomness. Moreover, we show that the bandwidth of such channels can be limited to be O (log (λ) ) by adding public ciphertext verifiability to the scheme under computational assumptions. In particular, we rely on a new security definition for obfuscation, Game Specific Obfuscation (GSO), which is a weaker definition than VBB, as it only requires the obfuscator to obfuscate programs in a specific family of programs, and limited to a fixed security game.
| Originalsprog | Engelsk |
|---|---|
| Titel | Security and Cryptography for Networks. SCN 2022 |
| Redaktører | Clemente Galdi, Stanislaw Jarecki |
| Antal sider | 24 |
| Udgivelsessted | Cham |
| Forlag | Springer |
| Udgivelsesår | 2022 |
| Sider | 220-243 |
| ISBN (trykt) | 978-3-031-14790-6 |
| ISBN (Elektronisk) | 978-3-031-14791-3 |
| DOI | |
| Status | Udgivet - 2022 |
| Begivenhed | 13th International Conference on Security and Cryptography for Networks, SCN 2022 - Amalfi, Italien Varighed: 12 sep. 2022 → 14 sep. 2022 |
Konference
| Konference | 13th International Conference on Security and Cryptography for Networks, SCN 2022 |
|---|---|
| Land | Italien |
| By | Amalfi |
| Periode | 12/09/2022 → 14/09/2022 |
| Serietitel | Lecture Notes in Computer Science |
|---|---|
| Vol/bind | 13409 |
| ISSN | 0302-9743 |
Se relationer på Aarhus Universitet Citationsformater
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