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cs.IT2005
Secure multiplex coding to attain the channel capacity in wiretap channels
Daisuke Kobayashi, Hirosuke Yamamoto, Tomohiro Ogawa
It is known that a message can be transmitted safely against any wiretapper via a noisy channel without a secret key if the coding rate is less than the so-called secrecy capacity…
cs.IT2005
Asymptotically Optimal Tree-based Group Key Management Schemes
Hideyuki Sakai, Hirosuke Yamamoto
In key management schemes that realize secure multicast communications encrypted by group keys on a public network, tree structures are often used to update the group keys efficien…