On: The greatest bug I never fixed (2010)

[fourneau]

This is the cleanest solution, IMO, rather than having to check each word/key/whatever of your protocol.

[mapcars → fourneau]

Depending on how the message is changed you might not be able to trust the checksum as well

[heinrich5991 → mapcars]

A checksum is usually intended not to match if the checksum itself is corrupted.