摘要
广播加密和基于属性加密是两种重要的公钥加密方案,可将加密内容同时传送给多个用户,在付费电视、数字版权管理和资源访问控制等领域有重要应用。对一个基于身份广播加密方案进行了分析,表明攻击者只要得到某个用户的私钥,就可以计算其他任何用户的私钥。研究了一个基于属性加密方案,该方案并不能真正地隐藏访问结构,攻击者仅由密文就能得到对应的访问结构。
Broadcast encryption （BE） and attribute-based encryption （ABE） schemes are two kinds of important public key encryption schemes, which can transmit an encrypted message to a lot of users simultaneously, and has significant application in many fields such as Pay-TV, digital copyright management and resource access control and so on. This paper first analyzed an identity-based BE （IBBE） scheme and the result shows that the attacker can compute the private key of any other user if it can obtain the key of one user. It also studied an ABE scheme, and proved that the scheme cannot really hide the access struc- ture and the attacker can get the associated access structure only from a ciphertext.
出处
《计算机应用研究》
CSCD
北大核心
2015年第1期218-221,共4页
Application Research of Computers
基金
国家自然科学基金资助项目(61202367)
上海市自然科学基金资助项目(12ZR1443700)
上海市教委创新基金资助项目(14YZ020)
关键词
基于身份
广播加密
基于属性加密
密码分析
identity-based
broadcast encryption
attributed-based encryption
cryptanalysis
