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子群中完全安全的基于身份的广播加密(英文)

Fully Secure Identity-based Broadcast Encryption in the Subgroups

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【Author】 Zhang Leyou1,2,Hu Yupu2,Wu Qing3 1Department of Mathematical Science,Xidian University,Xi’an 710071,P. R. China 2Key Laboratory of Computer Networks and Information Security,Ministry of Education,Xidian University,Xi’an 710071,P. R. China 3School of automation,Xi’an Institute of Posts and Telecommunications,Xi’an 710121,P. R. China

【机构】 Department of Mathematical Science,Xidian University； Key Laboratory of Computer Networks and Information Security,Ministry of Education,Xidian University； School of automation,Xi’an Institute of Posts and Telecommunications；

【摘要】 In this paper,we show how to use the dual techniques in the subgroups to give a secure identity-based broadcast encryption(IBBE) scheme with constant-size ciphertexts. Our scheme achieves the full security(adaptive security) under three static(i.e. non q-based) assumptions. It is worth noting that only recently Waters gives a short ciphertext broadcast encryption system that is even adaptively secure under the simple assumptions. One feature of our methodology is that it is relatively simple to leverage our techniques to get adaptive security.更多还原

【Abstract】 In this paper,we show how to use the dual techniques in the subgroups to give a secure identity-based broadcast encryption(IBBE) scheme with constant-size ciphertexts. Our scheme achieves the full security(adaptive security) under three static(i.e. non q-based) assumptions. It is worth noting that only recently Waters gives a short ciphertext broadcast encryption system that is even adaptively secure under the simple assumptions. One feature of our methodology is that it is relatively simple to leverage our techniques to get adaptive security.更多还原

【关键词】 identity-based broadcast encryption； dual system encryption； full security； static assumption； subgroup； provable security；
【Key words】 identity-based broadcast encryption； dual system encryption； full security； static assumption； subgroup； provable security；

【基金】 supported by the Nature Science Foundation of China under grant 60970119, 60803149;the National Basic Research Program of China(973) under grant 2007CB311201

【文献出处】中国通信 ,China Communications , 编辑部邮箱 ,2011年02期

【分类号】TN93;TP309.7
【被引频次】7
【下载频次】51

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