Damanik, Hillman Akhyar, et al. “ANALYSIS STEGO-IMAGE EXTRACTION USING ROT13 AND LEAST SIGNIFICANT BIT (LSB) ALGORITHM METHOD ON TEXT SECURITY”. Jurnal Ilmiah FIFO, vol. 9, no. 2, Nov. 2017, pp. 147-54, doi:10.22441/fifo.2017.v9i2.008.