Attribute based signcryption with constant ciphertext length
Lunzhi Deng, Siwei Li, Xiang‐Bin Wang · Journal of Discrete Mathematical Sciences and Cryptography · 2013
This paper presents an attribute-based signcryption scheme with constant ciphertext length. With this technique, signcrypter can signcrypt a message by his own attribute set and the receiver's attribute set. The unsigncrypter with specified attributes can unsigncrypt the ciphertext associated with these attributes. The unsigncrypter is sure that the message was signcrypted by some one with specified attribute set. The scheme is proven to be in-distinguishable against adaptive selective attacks (IND-ABSC-SA), existentially unforgeable against adaptive selective attacks (EUF-ABSC-SA).