Attribute-based key-insulated signcryption with bidirectional anonymity
To solve exposure of secret key in attribute-based signcryption with anonymity for both sender and receiver, key-insulation mechanism to attribute-based signcryption was untroduced.Given the formal definition and security no-tions,the scheme of attribute-based key-insulated signcryption was proposed,which is provably secure under the ellakai random