Others have explained why that does not work. The way you'd use backward time travel to crack a OTP is to wait until the recipient of the message decrypts it, then your steal the decrypted message, then you go back to the time where you wanted to break the code and give yourself the message.
Another use for backward time travel is data compression. To compress a file, you simply replace its contents with a note saying when you did this. When you later want the file, just pop back to that time and get it.
>Others have explained why that does not work. The way you'd use backward time travel to crack a OTB is to wait until the recipient of the message decrypts it, then your steal the decrypted message, then you go back to the time where you wanted to break the code and give yourself the message.
That's not actual decryption. You can do the same thing without time travel too, e.g by hitting the guy.
Another use for backward time travel is data compression. To compress a file, you simply replace its contents with a note saying when you did this. When you later want the file, just pop back to that time and get it.
This also greatly simplifies backup systems.