id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
iajs-1231	Jassim, J.N.; Muhsen, H. J.	One Algorithm to Cipher Messages in Columnar and Fixed Period-d Transposition Cipher	2017	7	.pdf	application/pdf	1975	96	74	Thus the first plain text character is moved to the third position in the cipher text, the second plain text character to first position, the third plain text character is moved to the fourth position and fourth character is moved to second position in cipher text. SCI VOL.22 (2) 2009 Programming and execution We can use only one program to obtain cipher text in both methods columnar and fixed period-d for many reasons which are:- 1- Each of them depends on permutation of letters with others in the same text.	cache/iajs-1231.pdf	txt/iajs-1231.txt