Provable Security Analysis of FIDO2
Provable Security Analysis of FIDO2
复制标题
FIDO2 可证明的安全性分析
DOI:
10.1007/978-3-030-84252
复制
发表时间:
2021
期刊:
影响因子:
--
通讯作者:
Warinschi, Bogdan
中科院分区:
文献类型:
--
作者:
Barbosa, Manuel;Boldyreva, Alexandra;Chen, Shan;Warinschi, Bogdan
We carry out the first provable security analysis of the new FIDO2 protocols, the promising FIDO Alliance’s proposal for a standard forpasswordlessuser authentication. Our analysis covers the core components of FIDO2: the W3C’s Web Authentication (WebAuthn) specification and the new Client-to-Authenticator Protocol (CTAP2).Our analysis ismodular. For WebAuthn and CTAP2, in turn, we propose appropriate security models that aim to capture their intended security goals and use the models to analyze their security. First, our proof confirms the authentication security of WebAuthn. Then, we show CTAP2 can only be proved secure in a weak sense; meanwhile, we identify a series of its design flaws and provide suggestions for improvement. To withstand stronger yet realistic adversaries, we propose a generic protocol called sPACA and prove its strong security; with proper instantiations, sPACA is also more efficient than CTAP2. Finally, we analyze the overall security guarantees provided by FIDO2 and WebAuthn+sPACA based on the security of their components.We expect that our models and provable security results will help clarify the security guarantees of the FIDO2 protocols. In addition, we advocate the adoption of our sPACA protocol as a substitute for CTAP2 for both stronger security and better performance.
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DOI:
10.1145/3243734.3243798
发表时间:
2018
期刊:
Proceedings of the 2018 ACM SIGSAC Conference on Computer and Communications Security
影响因子:
--
作者:
Tibor Jager;Saqib A. Kakvi;Alexander May
通讯作者:
Alexander May
DOI:
--
发表时间:
2018
期刊:
Symposium and Bootcamp on the Science of Security
影响因子:
--
作者:
Iness Ben Guirat;H. Halpin
通讯作者:
H. Halpin
DOI:
--
发表时间:
2021
期刊:
IACR Cryptology ePrint Archive
影响因子:
--
作者:
M. Fischlin;Arno Mittelbach
通讯作者:
Arno Mittelbach
DOI:
--
发表时间:
2011
期刊:
Request for Comments
影响因子:
--
作者:
D. McGrew;Kevin M. Igoe;M. Salter
通讯作者:
M. Salter
DOI:
--
发表时间:
1995
期刊:
影响因子:
--
作者:
Air Force Air Force Materiel Command Hq
通讯作者:
Air Force Air Force Materiel Command Hq