Provable Secure Key Exchange Based on Attribute
Hao Yun-fang · Modern Electronics Technique · 2011
With the extension of identity-based cryptography,the attribute-based encryption haas been used to control different authorities of decrypting a cipher-text among different users in a more flexible manner.Thus attribute-based encryption has become a hot research topic nowadays.With the development of attribute-based encryption,the attribute-based key exchange has also become a point which attracts a great deal of attention.The distinctive features of key exchange protocols are analyzed.An attribute-based key exchange based on Sahai-Waters attribute-based encryption is proposed,which can flexibly control the access authority of different users.The protocol requires only one round of message sending.Moreover,based on the security request of key exchange protocols,a new security definition for attribute-based key exchange protocol is given.The security of the protocol is proved with the standard model.