Abstract:

The access control of encrypted documents can be well realized by using attribute-based encryption schemes. But the attributes are static in all attribute-based encryption schemes, resulting in certain problems in practical applications. Based on conditionsbased encryption, a dynamic attribute-based encryption scheme is developed.The scheme allows one user to calculate his own attributes key in the scheme once he satisfies a certain attribute after the authenticating party’s digital signature is given.The security of the scheme is discussed at last.

Key words: attribute encryption scheme;conditions encryption scheme;dynamic;bilinear pairings