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- Path: sparky!uunet!hela.iti.org!usc!news.bbn.com!clements
- From: clements@bbn.com (Bob Clements)
- Newsgroups: sci.crypt
- Subject: Re: VCR Plus Codes
- Date: 15 Oct 1992 15:33:26 GMT
- Lines: 23
- Message-ID: <ldr3q6INN7fo@news.bbn.com>
- References: <1992Oct12.154619.17062@draco.macsch.com> <1992Oct12.224852.2170@draco.macsch.com> <1992Oct14.152230.16549@linus.mitre.org>
- NNTP-Posting-Host: classic.bbn.com
-
- In article <1992Oct14.152230.16549@linus.mitre.org> ptrei@bistromath.mitre.org (Peter Trei) writes:
-
- > Nevertheless, the algorithm for codes of up to 6 characters (ie,
- ****^****
- >the vast majority of them) has been decrypted and published:
-
- > Curiously, the channel number is only 5 bits long.
- ****^****
-
-
- These two facts seem to be correlated. If you look at the listings
- for channel 68 in Boston, for example, you'll find that every listing,
- even for prime time one-hour or half-hour programs, has more than
- six digits.
-
- So, roughly, the added two digits in the longer codes must encode
- the extra channel numbers as well as the number of five-minute
- increments to add/subtract from the start time and duration.
-
- > Peter Trei
- > ptrei@Mitre.org
-
- Bob Clements, K1BC, clements@bbn.com
-