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[aprssig] Authentication over APRS was: Ab)Use of APRS for telemetry? Anyone doing it?

Brian B. Riley brianbr at mac.com
Mon Dec 6 16:47:20 UTC 2004

This is one of the most misunderstood rules in Part 97. While it may seem I
am just replaying your words, please read the next sentence and note the
order in which I make the statement.

 "Encryption is prohibited for the purposes of 'obscuring the meaning' of a

 Encryption has always been permitted for security purposes; that is to say
an encoded/encrypted password exchange system is perfectly valid to keep a
remote control link secure from unauthorized access. The most common example
in the ham community has always been the satellite command links.

Its a matter of intent. You must use an accepted encryption scheme so the
boys at Ft Meade can crack your system, but it effectively leaves 99+% of
the population unable to screw with your equipment.

Cheers ... 73 de brian, n1bq, underhill center, vermont

On 12/6/04 10:43 AM, "James Washer" <washer at trlp.com> wrote:

> This brings up a question I've had for some time. As I recall, the FCC rules
> prevent amateurs from using "encryption" or anything that obscurs the meaning
> of a message. I don't recall the exact words.

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