A Redactable Blockchain-Based Data Management Scheme for Agricultural Product Traceability

. 2024 Mar 4;24(5):1667. doi: 10.3390/s24051667

Algorithm 1 Data Encryption

Input:
Original data

m_{d a t a}

and access policy

A P

Output:
Ciphertext of data

C T_{d a t a}

, ciphertext of AES key

C T_{k e y}

, digital digest

D D

1: Randomly select key of AES algorithm

k e y_{A E S}

2: Calculate

C T_{d a t a} = A E S . E n c (m_{d a t a}, k e y_{A E S})

3: Calculate

C T_{k e y} = V F - C P - A B P R E . E n c (k e y_{A E S}, A P)

4: Calculate

D D = S H A - 256 (m_{d a t a})

5: return

C T_{d a t a}, C T_{k e y}, D D