Table 1 Symbol explanation.

From: A processing-type active real-time traceable certification system

Symbol

Explanation

ID

Product number QR code

F

Wholesaler number \(F_1, F_2, \cdots , F_n\)

CF

Processing plant number \(CF_1, CF_2, \cdots , CF_n\)

M

Retailer number \(M_1, M_2, \cdots , M_n\)

TW

Total weight

\(W(\cdot )\)

Processing function

WS

Processing product electronic label

FS

Electronic label \(S_1, S_2, \cdots , S_n\)

\(FS'\)

New electronic label \(S_1', S_2', \cdots , S_n'\)