The application relates to a multi-image optical phase truncation asymmetric security
compression method, relates to the field of image
encryption technology, and solves the problems of insufficient nonlinear characteristics, low key security and poor transmission efficiency in the existing
optical image encryption process. In the phase truncation asymmetric security
compression method, the initial key is encrypted through an elliptic curve
algorithm and a hash
algorithm, the truncated private key is subjected to
class type permutation and scrambling, and the private key is processed as an initial value for generating a composite secondary
chaotic phase mask, so that the security of the
encryption process is greatly improved; and the method of multi-image encryption solves the problem of
low transmission efficiency, and greatly improves the transmission efficiency.