Notation | Definition |
| Worker’s global identity |
| The public key of attribute i |
| The secret key of attribute i |
| The public key of anonymous account Z |
| The secret key of anonymous account Z |
| The credential key of attribute i for ’s anonymous account Z |
| The public key used by the requester when publishing the task |
| A function to encrypt content with a public key encryption, for instance, RSA |
| Revoked anonymous account collection |
| Task content ciphertext |
| Proof of attribute for the task |
stamp | The stamp of current blockchain epoch |