id: 06102375
dt: a
an: 06102375
au: Watanabe, Yohei; Seito, Takenobu; Shikata, Junji
ti: Information-theoretic timed-release security: key-agreement, encryption,
    and authentication codes.
so: Smith, Adam (ed.), Information theoretic security. 6th international
    conference, ICITS 2012, Montreal, QC, Canada, August 15‒17, 2012.
    Proceedings. Berlin: Springer (ISBN 978-3-642-32283-9/pbk). Lecture
    Notes in Computer Science 7412, 167-186 (2012).
py: 2012
pu: Berlin: Springer
la: EN
cc: 
ut: 
ci: 
li: doi:10.1007/978-3-642-32284-6_10
ab: Summary: In this paper, we study timed-release cryptography with
    information-theoretic security. As fundamental cryptographic primitives
    with information-theoretic security, we can consider key-agreement,
    encryption, and authentication codes. Therefore, in this paper, we deal
    with information-theoretic timed-release security for all those
    primitives. Specifically, we propose models and formalizations of
    security for information-theoretic timed-release key-agreement,
    encryption, and authentication codes, and we present constructions of
    those ones. In particular, information-theoretic timed-release
    encryption and authentication codes can be constructed from
    information-theoretic timed-release key-agreement in a generic and
    simple way. Also, we derive tight lower bounds of sizes of secret-keys
    and show an optimal construction for information-theoretic
    timed-release key-agreement. Furthermore, we investigate a relationship
    of mechanisms between information-theoretic timed-release key-agreement
    and information-theoretic key-insulated key-agreement. It turns out
    that there exists a simple algorithm which converts the former into the
    latter, and vice versa. In the sense, we conclude that these two
    mechanisms are essentially close.
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