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Single private-key generator security implies multiple private-key generators security. (English) Zbl 1421.94048
Baek, Joonsang (ed.) et al., Provable security. 12th international conference, ProvSec 2018, Jeju, South Korea, October 25–28, 2018. Proceedings. Cham: Springer. Lect. Notes Comput. Sci. 11192, 56-74 (2018).
Summary: This paper discusses the security of identity-based cryptography with multiple private-key generators (mPKG-IBC). Most mPKG-IBC schemes and protocols are statically secure where private-key generators (PKGs) cannot control a binding between a party and its PKG. We propose adaptive security notions for identity-based key encapsulation mechanism with multiple private-key generators, identity-based signature with multiple private-key generators, and identity-based authenticated key exchange with multiple private-key generators, respectively. In additions, we provide their generic constructions of those from identity-based key encapsulation mechanism, identity-based signature, and identity-based authenticated key exchange which are secure in a single PKG model, respectively.
For the entire collection see [Zbl 1398.94007].
94A60 Cryptography
94A62 Authentication, digital signatures and secret sharing
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