Notation

Definition

$W_{id}$

Worker’s global identity

$AP{K}_i$

The public key of attribute i

$AS{K}_i$

The secret key of attribute i

$UP{K}_z$

The public key of anonymous account Z

$US{K}_z$

The secret key of anonymous account Z

$WS{K}_{i,id,z}$

The credential key of attribute i for $W_{id}$ ’s anonymous account Z

$P{K}_{\text{requester}}$

The public key used by the requester when publishing the task

$Enc\left(key,content\right)$

A function to encrypt content with a public key encryption, for instance, RSA

$Rse{t}_{\text{account}}$

Revoked anonymous account collection

$C{T}_{\text{task}}$

Task content ciphertext

$Proo{f}_{\text{task}}$

Proof of attribute for the task

stamp

The stamp of current blockchain epoch