Protein Motifs to Hide GA-Based Encrypted Data

Algorithm 5

Decryption algorithm.

	Input: En_text,K;
	Output: PlainText;
	Begin.
(1)	key = Generated_Key(K);
(2)	L_P = length (En_text);
(3)	L_K = length(key);
(4)	i = 1; x = 0;
(5)	While(i ≤ L_P)
	{
	for (j = 0; j < 2; j++).
	(5.1)Out_Not[j + i] = Not_gate(En_text[j + i]);//complement the cipher text
	(5.2)Cut_type = x mod 4;
	if (Cut_type = = 0).
	then one_point_crossover(Out_Not[i], Out_Not[i+1]);
	else if(Cut_type =  = 1).
	then two_point_crossover(Out_Not[i], Out_Not[i+1]);
	else if(Cut_type =  = 2).
	then multi_point_crossover(Out_Not[i], Out_Not[i+1]);
	else uniform_point_crossover(Out_Not[i], Out_Not[i+1]);
	i = i+2;
	x = x+1;
	}//while.
(6)	j = 1;
(7)	for i = 1 to L_P do
	{
	Out_XOR[i] = XOR_gate(Out_Not[i],key[j]);
	Dec[i] = binary_to_decimal(ascii(Out_XOR[i]);
	If(Dec[i]>257) then Dec[i] = Dec[i] mod 256;
	PlainText[i] = decimal_to_char(ascii(Dec[i]));
	If (j =  = L_K) then j = 1;
	Else j = j+1;
	}//for.
	End.//Algorithm.