By 'breaking the encryption' I meant 'going around the wall', that is, rendering the encryption ineffective. I know, taken literally 'breaking the encryption' means finding/exploiting a flaw in the actual algorithm, but I was speaking idiomatically - think 'arrays of arrays' in Perl.
Incidentally, and in agreement with you, tilly: I can't remember the source, but I recall someone from the NSA as being quoted as saying: "We don't need to break DES, because the implementations are so poor". For lots of cases, you can probably s/DES/modern cipher/.
email: perl -e 'print reverse map { chr( ord($_)-1 ) } split //, "\x0bufo/hojsfufqAofc";'
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