Secure Broadcast System with Simultaneous Individual Messaging
スポンサーリンク
概要
- 論文の詳細を見る
Broadcasters transmit TV programs and often need to transmit an individual message, e.g. an individual contract, to each user. The programs have to be encrypted in order to protect the copyright and the individual messages have to be encrypted to preserve the privacy of users. For these purposes, broadcasters transmit not only encrypted content but also encrypted personalized messages to individual users. Current broadcasting services employ an inefficient encryption scheme based on a symmetric key. Recently, several broadcast encryption schemes using a public key have been proposed in which the broadcaster encrypts a message for some subset S of users with a public key and any user in S can decrypt the broadcast with his/her private key. However, it is difficult to encrypt a personalized message and transmit it to every user efficiently. In this paper, we propose a broadcast encryption scheme that has a personalized message encryption function. We show that our scheme is efficient in terms of the ciphertext size.
- 2011-06-01
著者
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Imai H
National Inst. Of Advanced Industrial Sci. And Technol. Tokyo Jpn
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Imai Hideki
Faculty Of Science And Engineering Chuo University:research Center For Information Security (rcis) N
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OGAWA Kazuto
Science & Technical Research Laboratories, Japan Broadcasting Corporation
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Hanaoka Goichiro
Institute Of Industrial Science The University Of Tokyo
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Hanaoka Goichiro
3rd Department Institute Of Industrial Science The University Of Tokyo
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Ogawa K
Science & Technology Research Laboratories Japan Broadcasting Corporation
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ATTRAPADUNG Nuttapong
AIST
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OHTAKE Go
Science & Technical Research Laboratries, Japan Boardcasting Corporation
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Ohtake Go
Science & Technology Research Laboratories Japan Broadcasting Corporation
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Hanaoka G
National Institute Of Advanced Industrial Science And Technology
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Hanaoka Goichiro
National Inst. Of Advanced Industrial Sci. And Technol. Tokyo Jpn
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Imai Hideki
National Astronomical Observatory
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Attrapadung Nuttapong
National Institute Of Advanced Industrial Science And Technology
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FUJII Arisa
Science & Technology Research Laboratories, Japan Broadcasting Corporation
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WATANABE Hajime
National Institute of Advanced Industrial Science and Technology
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Fujii Arisa
Science & Technology Research Laboratories Japan Broadcasting Corporation
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