The invention discloses an identity
authentication method based on biological feature
encryption and a homomorphic
algorithm. The method is quicker than a normal
password method by using biological features of users as passwords to log in a
system through a
mobile device, using an encrypted biological template is
safer, and privacy of the users can be guaranteed as information is transmitted in a
ciphertext form. By adding factors such as timestamps, tri-party
authentication among the users, a provider
server and a
cloud computing server is realized, and reliability among the three parties is enhanced. Legal users can be prevented from using resources in the
cloud computing environment illegally to better manage the resources by means of
user authentication operation according to attribution predicate
encryption and real-time updating of permission information. Operation without
encryption can be realized by the aid of the homomorphic
algorithm, same effects as decrypting before operation can be achieved, time and space expenses can be saved,
system efficiency is greatly improved, and the identity
authentication method has high safety and efficiency.