关键词: 属性签名, 条件加密, 动态, 双线性对

Abstract: The user’s privacy can be well protected using attribute-based signature scheme. But the attributes are static in all attribute-based signature schemes, which are due to certain problems in practical applications：when the member’s attribute has been changed, there is no corresponding mechanism to re-assign the attributes key, which will cause tremendous burden. Based on conditions-based encryption, this paper develops a dynamic attribute-based signature scheme. User is allowed to calculate its own attributes key in the scheme once it satisfies certain attribute after the authenticating party’s digital signature is given. The security of the scheme is discussed.

Key words: attribute signature scheme, conditions encryption scheme, dynamic, bilinear pairings