Research Article
PPSEB: A Postquantum Public-Key Searchable Encryption Scheme on Blockchain for E-Healthcare Scenarios
| Input: set , current time period , secret key in previous time period | | Output: and , where is the secret key during this period | | (1) | Compute | | (2) | Set | | (3) | Compute | | (4) | Set | | (5) | Compute | | (6) | Set | | (7) | Call NewBasisDel to compute , where is the secret key during this period | | (8) | Compute | | (9) | Set | | (10) | Return and |
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