Security and Communication Networks

Research Article

PPSEB: A Postquantum Public-Key Searchable Encryption Scheme on Blockchain for E-Healthcare Scenarios

Algorithm 4

.
Input: set , current period , public-secret key pair , one keyword
Output: and
(1)Compute
(2)Set
(3)Call NewBasisDel to generate one short lattice basis in random
(4)Call SamplePre to generate the trapdoor
(5)Return