Beefy Boxes and Bandwidth Generously Provided by pair Networks
Do you know where your variables are?
 
PerlMonks  

Atbash cipher

by chargrill (Parson)
on Mar 29, 2006 at 06:58 UTC ( #539882=obfuscated: print w/ replies, xml ) Need Help??

A relatively simple obfuscation for a relatively simple substitution cipher. This either takes a file as a parameter to encrypt in atbash, or provided no input encrypt's it's __DATA__.

#!/usr/bin/perl open DATA,$ARGV[0]if$ARGV[0];$ ,=65;@ .=map$_,reverse chr$ ,..pack'c', +$ .;$.=$, +25;print join'',map{join'',map{$ *=ord>ord uc z?push(@%,/./)&&uc:push +(@%,0)&&$ _;$ ^=$ *=~/[chr$,-chr$.]/?$.[(ord$*)-$,]:$*;$%[$;++]?lc$^:$^}split q, +,,}<DATA> __DATA__ This is an implementation of an atbash (or 'zgyzhs') cipher, which enc +odes strings by replacing 'a' with 'z', 'b' with 'y', etc. This is my test + string. This string includes CAPital letters, spaces, punctuation, and newline +s. This tests EVERY capability of this implementation.


--chargrill
$,=42;for(34,0,-3,9,-11,11,-17,7,-5){$*.=pack'c'=>$,+=$_}for(reverse s +plit//=>$* ){$%++?$ %%2?push@C,$_,$":push@c,$_,$":(push@C,$_,$")&&push@c,$"}$C[$# +C]=$/;($#C >$#c)?($ c=\@C)&&($ C=\@c):($ c=\@c)&&($C=\@C);$%=$|;for(@$c){print$_^ +$$C[$%++]}

Comment on Atbash cipher
Select or Download Code

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: obfuscated [id://539882]
Approved by liverpole
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others avoiding work at the Monastery: (6)
As of 2015-07-03 21:30 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    The top three priorities of my open tasks are (in descending order of likelihood to be worked on) ...









    Results (56 votes), past polls