malleability attack:

echo $"2000$ to Chicago" $|$ openssl aes$-256-$cbc $-$nosalt $-$iv $00000000000000000000000000000000-$e $>$ message.enc

when done like this:

openssl aes$-256-$cbc $-$nosalt $-$iv $00000000000000000000000000000000-$d