Covert Communication Scheme Based on Bitcoin Transaction Mechanism

Algorithm 2

Secret information embedding.

Input: Key K, symmetric key k, secret information m.
Output: The ID of the special transaction ID_Ts.
(1)	;
(2)	; /∗K and k are negotiated in advance ∗/
(3)	; /∗Random generation∗/
(4)	;
(5)	;
(6)	;
(7)	;
(8)	;
(9)	;
(10)	return ID_Ts;
(11)	end;