Difference between revisions of "ROT13"

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[[Category:Guides]]
 
[[Category:Guides]]
[[Wikipedia:ROT13|ROT13 on wikipedia]].
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ROT13 is a simple cipher used to obscure geocache hints. Geocachers who want the hint can decrypt it fairly easily by hand, but it is more difficult for others to "accidently" read the hint (and spoil their fun).
 
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''The wikipedia article above can provide you with all the details and mathematics about ROT13, here is why it relates to geocaching.''
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ROT13 is a simple cipher used to obscure geocache hints in a way that allows a determined person to decode the hint if they want to, but makes it impossible to "accidently" read the hint (and spoil your fun). ROT-13 can be decoded by hand with just a pencil rather quickly.  Here is the key:
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Here is the key for ROT13 encryption/decryption:
  
 
  A B C D E F G H I J K L M
 
  A B C D E F G H I J K L M
 
  N O P Q R S T U V W X Y Z
 
  N O P Q R S T U V W X Y Z
  
 
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To encrypt or decrypt a letter, just find it in the key and select the letter above or below it.
To encode or decode a letter, just find it on the chart and pick the letter above or below it as your coded letter.
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===Example===
 
===Example===
 
  Ybbx va gur gerr
 
  Ybbx va gur gerr
  
The first letter of this encrypted hint is '''Y''', Y corresponds to L on the key above.  So we know that the hint text starts with L:
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The first letter of this encrypted hint is '''Y''', which corresponds to '''L''' in the key.  So we know that the hint starts with '''L''':
 
  L
 
  L
The next two letters are '''bb'''.  Using the key above, we see that they become ''oo''. '''x''' becomes ''k'', so the first word is:
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Ybbx va gur gerr
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The next two letters are '''bb''', and '''b''' corresponds to '''o'''. Then '''x''' corresponds to '''k''', and we have the first word of the hint:
 
  Look
 
  Look
As we continue to uncode the hint, eventually we come up with this:
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Ybbx va gur gerr
  Look in the tree.
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We can decrypt the rest of the hint in the same manner:
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  Look in the tree
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Ybbx va gur gerr
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Many experienced geocachers have memorized the ROT13 key and can decrypt caching hints very quickly. Also, certain words (e.g., "magnetic") appear so frequently in caching hints that many experienced geocachers recognize them in their encoded form (e.g., "zntargvp").
  
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== See Also ==
  
Many experienced geocachers have memorized this chart and can decode caching hints in a flash.
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* [[Wikipedia:ROT13|Wikipedia's ROT13 article]] provides further details about ROT13, apart from its use in geocaching.
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* [http://www.rot13.com ROT13.com] provides an online ROT13 encryption/decryption program.
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* [http://www.palmspot.com/software/detail/ps6968a_9879.html c1ph3r 1.3] is Palm OS freeware for Rot13 encryption/decryption, for reversing text, and for converting text to l33t speak.

Latest revision as of 16:25, 4 September 2008

ROT13 is a simple cipher used to obscure geocache hints. Geocachers who want the hint can decrypt it fairly easily by hand, but it is more difficult for others to "accidently" read the hint (and spoil their fun).

Here is the key for ROT13 encryption/decryption:

A B C D E F G H I J K L M
N O P Q R S T U V W X Y Z

To encrypt or decrypt a letter, just find it in the key and select the letter above or below it.

[edit] Example

Ybbx va gur gerr

The first letter of this encrypted hint is Y, which corresponds to L in the key. So we know that the hint starts with L:

L
Ybbx va gur gerr

The next two letters are bb, and b corresponds to o. Then x corresponds to k, and we have the first word of the hint:

Look
Ybbx va gur gerr

We can decrypt the rest of the hint in the same manner:

Look in the tree
Ybbx va gur gerr

Many experienced geocachers have memorized the ROT13 key and can decrypt caching hints very quickly. Also, certain words (e.g., "magnetic") appear so frequently in caching hints that many experienced geocachers recognize them in their encoded form (e.g., "zntargvp").

[edit] See Also

  • Wikipedia's ROT13 article provides further details about ROT13, apart from its use in geocaching.
  • ROT13.com provides an online ROT13 encryption/decryption program.
  • c1ph3r 1.3 is Palm OS freeware for Rot13 encryption/decryption, for reversing text, and for converting text to l33t speak.
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