| Author | Fischlin, Marc; Haagh, Helene |
|---|
| Date | 2019 |
|---|
| Type | Conference Proceedings |
|---|
| Abstract | We investigate the possibility to use obfuscated implementations of the Advanced Encryption Standard AES (“white-boxed AES”) to devise secure signature schemes. We show that the intuitive idea to use AES-based message authentication codes to sign, and the white-boxed implementation to verify, fails in general. This underlines that providing a secure white-box implementation is only the first step and that using it securely as a component in cryptographic protocols may be harder than originally thought. We therefore provide secure signature schemes based on white-boxed AES and on random oracles, as well as stateful and stateless constructions without random oracles. All our solutions are shown to be secure for reasonable parameters. |
|---|
| Conference | 6th International Conference on Cryptology and Information Security in Latin America |
|---|
| Isbn | 978-3-030-30529-1 |
|---|
| Serie | Lecture Notes in Computer Science |
|---|
| In | LATINCRYPT 2019: Progress in Cryptology - LATINCRYPT 2019, p.259-279 |
|---|
| Publisher | Springer |
|---|
| Url | https://tubiblio.ulb.tu-darmstadt.de/id/eprint/115401 |
|---|
