Cifra ROT13
Codifique e decodifique texto usando ROT13 ou rotações personalizadas de cifra de César. ROT13 é auto-reversível - aplique duas vezes para obter o original.
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 A B C D E F G H I J K L M
About Caesar Cipher:
- • ROT13: Shift by 13, self-reversing (encode = decode)
- • Each letter is replaced by one that is N positions down the alphabet
- • Non-alphabetic characters (numbers, symbols, spaces) are preserved
- • Named after Julius Caesar who used it for secret correspondence
- • Not secure for actual encryption - only for obfuscation/fun
ROT13 - Detalhes Técnicos
ROT13 shifts each letter by 13 positions in the alphabet. Since there are 26 letters, applying ROT13 twice returns the original text. It was commonly used to hide spoilers in forums.
Alternativa via Linha de Comando
# Using tr command
echo 'Hello World' | tr 'A-Za-z' 'N-ZA-Mn-za-m'
# Using Python
python3 -c "import codecs; print(codecs.encode('Hello', 'rot_13'))"