| (1) Data: . |
| (2) Result: one-time pad of size , where is the size of the plaintext. |
| Remark : Generate an initial population Popu of size , where th chromosome is represented as binary string equivalent to . |
| Here the initial vector is computed via LCG equation, where . That is: |
| (3) for from 0 to do |
| (4) Set mod () |
| (5) end for |
| Remark : Initialize two positive integers: Number of selection of chromosome pairs for crossover ( ) and Number of |
| selection of chromosomes for mutation ( ) by “1”. Sometime, we refer and as crossover and mutation rates, |
| respectively. |
| (6) Set 1, 1 |
| Remark : Update crossover and mutation rate, if the size of population is more than or equal to 10. That is: |
| (7) if 10 then |
| (8) Compute |
| (9) if then |
| (10) Compute . To maintain low probability mutation in case of large sized population. |
| (11) else |
| (12) Compute |
| (13) end if |
| (14) end if |
| (15) Initialize mod () |
| (16) |
| (17) repeat |
| Remark : Select a pair of chromosome and determine a point of crossover. Repeat the process till counter reached . |
| (18) for from 1 to do |
| (19) Set (mod) |
| (20) Compute mod () |
| (21) Set (mod) |
| (22) Compute mod () |
| (23) Set mod (), where denotes the starting bit position of the chosen |
| chromosomes to be reproduced. Here , since a maximum integer value equivalent to its binary representation could |
| be 255 (i.e., ). |
| (24) Perform single point crossover between pairs of selected chromosomes. That is between and |
| with probability , where the starting point for mating is denoted by . |
| (25) end for |
| (26) Set |
| Remark : Select an individual from the mated population and perform a single bit complement mutation for each of the |
| following iteration, where the new population was generated in the previous steps (18)–(25). |
| (27) for from 1 to do |
| (28) Compute mod () |
| (29) Set (mod) |
| (30) Set (mod) , where denotes the position of a bit of the selected chromosome, |
| . |
| (31) Change a bit of located at position . |
| (32) end for |
| (33) Update |
| (34) Set |
| (35) Update mod () |
| (36) until counter reached |
