Kan noen forklare dette så enkelt som mulig?
Encryption: C[sub]i[/sub] = M[sub]i[/sub] + K[sub]j[/sub] (mod 26)
Decryption: M[sub]i[/sub] = C[sub]i[/sub] - K[sub]j[/sub] (mod 26)
"where i is the ith character of the message bounded by the length of the message and j is the jth character of the key bounded by the length of the key."
Hvis dere trenger hele sammenhengen, så er den her: http://jason.mchu.com/VCE/
Takk for hjelp!