ES-PPDA: an efficient and secure privacy-protected data aggregation scheme in the IoT with an edge-based XaaS architecture

Journal of Cloud Computing

Advances, Systems and Applications

Table 2 Notations and symbols

Notation	Description
(k, k₁)	Security parameters
SP_pub	Public key of SP
msk	Master key
X_i	Random number
k_i	Blind factor
α_i, β_i	Registration knowledge
(y, z)	Random numbers
St	Status information of signer
\({\sum}_i^{off}\)	Offline signature
\({\sum}_i^{on}\)	Online signature
Ver_on	Online signature verification
Ver_pk	Verify with public key
c_i	Encrypted report
v_i	An integer
m_i	Message
Y_i	Public key
∑_Agg	Aggregate signature
g₁	DTCH generator
H_i	Hashing function