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Do you know script who take from user a string of letters and encrypt those letters (change the meaning) 4example for A=B B=I K=H . If user write KAB it will by HBI when he write BKA it will by IHB and so on, next it will save this "hash" in .txt file, (I hope) that You know what I mean . Sorry for my language and spelling mistakes.

rot13 is well documented on this site. just search for it.

Thanks for this Rot13, but i wondering if it is possible do script in batch who will by encrypt input code according a formula, so that the user does not have to do that with the help of for example Rot13 ?