🚀 go-pugleaf

In article <57@decvax.UUCP> minow@decvax.UUCP (Martin Minow) writes:
>Have I forgotten something?

What you described amounts to a "book code".  Unlike real books,
CDs are quite amenable to computerization.  While this is an advantage
for the encryptor, it is an even bigger advantage for the analyst.

The real problem is that, despite initial appearances, the key space
is rather small.  A dedicated cryppy would have a complete CD library;
he would also preprocess the library to develop a file of characteristic
statistical signatures so that he could relatively quickly determine
which key you actually used for your message.

One-time pad systems really MUST use truly random keys to guarantee
unbreakability.  The keys could be distributed as magtapes, CD disks,
and so forth, but you need to limit distribution to just the intended
communicators, not record stores.  The best scheme would be to have
the key automatically destroyed as it is used.