Research Article
HA-Med: A Blockchain-Based Solution for Sharing Medical Data with Hidden Policies and Attributes
Table 2
Symbols used in the theoretical analysis.
| | Notation | Description |
| | Exponentiation in | | Exponentiation in | | Number of attributes | | Symmetric encryption and decryption operation | | Number of positive attributes | | Number of negative attributes | | Number of wildcards | | Pairing operation |
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