[Retracted] Blockchain-Based Information Supervision Model for Rice Supply Chains

Algorithm 3

Process of SM3 encryption.

	Input: plaintext
	Output: ciphertext
	plaintext = m
	/∗ Fill the message m with M1, which is an integer multiple of 512
	Group the filled messages, where B (0) B (1)... B (n − 1) where n = (L + K + 65)/512, and l is the plaintext length ∗/
	for (i = 0; i < n; i++) {
	The packet message Bi is extended to generate 132 words
	Carry in the generated word for iterative compression
	}
	The final hash value is obtained by iterative compression, IV (n) = CF (IV (n − 1), B (n − 1))
	ciphertext = V (n)