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001-es BibID:	BIBFORM091814
035-os BibID:	(Scopus)85098288476
Első szerző:	Huszti Andrea (informatikus)
Cím:	Provably Secure Scalable Distributed Authentication for Clouds / Andrea Huszti, Norbert Oláh
Dátum:	2020
ISSN:	0302-9743
Megjegyzések:	One of the most used authentication methods is based on short secrets like password, where usually the hash of the secrets are stored in a central database. In case of server compromise the secrets are vulnerable to theft. A possible solution to this problem to apply distributed systems. We propose a mutual authentication protocol with key agreement, where identity verification is carried out by multiple servers applying secret sharing technology on server side. The protocol results in a session key which provides the confidentiality of the later messages between the participants. In our solution we also achieve robustness and scalability as well. To show that the proposed protocol is provably secure, we apply the threshold hybrid corruption model. We assume that among the randomly chosen k servers, there is always at least one uncorrupted and the authentication server reveals at most the long-lived keys. We prove that the protocol is secure in the random oracle model, if Message Authentication Code (MAC) is universally unforgeable under an adaptive chosen-message attack, the symmetric encryption scheme is indistinguishable under chosen plaintext attack, moreover Elliptic Curve Computational Diffie-Hellman assumption holds in the elliptic curve group.
ISBN:	978-3-030-65410-8
Tárgyszavak:	Műszaki tudományok Informatikai tudományok előadáskivonat könyvrészlet
Megjelenés:	Cryptology and Network Security / eds. Stephan Krenn, Haya Shulman, Serge Vaudenay. - p. 188-210. -
További szerzők:	Oláh Norbert (1991-) (gazdaságinformatikus)
Pályázati támogatás:	EFOP-3.6.2-16-2017-00015 EFOP SETIT Project 2018-1.2.1-NKP-2018-00004 egyéb NKFIH 2018-1.2.1-NKP egyéb
Internet cím:	DOI Intézményi repozitóriumban (DEA) tárolt változat
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