00 X C I 1 4 7 00 X Rar -

When substituted, the sequence looks like: 00 10 100 1 1 4 7 00 10

C (12 in decimal) and I (9 in decimal) are sometimes used as direct numerical offsets rather than simple letters. 00 X C I 1 4 7 00 X rar

The numbers 1, 4, 7 in the center often act as the "key" or the shift value for a Vigenère cipher or a Caesar cipher . When substituted, the sequence looks like: 00 10

The numbers are interpreted as Hexadecimal (Base-16) pairs or values. In many iterations of this puzzle, these values are mapped to ASCII characters or specific coordinates. 00 X C I 1 4 7 00 X rar