Cifrar y descifrar con el cifrado César (7 desplazamientos)
# Cifrar echo "Gloria descifra este mensaje" | tr [a-z] [h-zabcdef] | tr [A-Z] [H-ZABCDEF] # Descifrar echo "Nsvyph klzjpmyh lzal tluzhql" | tr [h-zabcdef] [a-z] | tr [H-ZABCDEF] [A-Z]
# Cifrar echo "Gloria descifra este mensaje" | tr [a-z] [h-zabcdef] | tr [A-Z] [H-ZABCDEF] # Descifrar echo "Nsvyph klzjpmyh lzal tluzhql" | tr [h-zabcdef] [a-z] | tr [H-ZABCDEF] [A-Z]