4 Dec
2021
4 Dec
'21
3:02 a.m.
Any that don’t require a key to decompress, ie anything where you don’t
enter a password to compress it. Else it’s not encryption.
Tom
On Fri, 3 Dec 2021 at 19:54, Cliff Sojourner via 44Net <
44net(a)mailman.ampr.org> wrote:
They are on the same spectrum of methods to remove the
entropy of a
message. Basic cryptography.
What compression techniques are we presently allowed to use over the air?
Cliff K6CLS CM87
On December 3, 2021 11:38:22 AM PST, "Tim Požar" <pozar(a)lns.com> wrote:
Please point to the reference that says
compression is encryption.
Tim
On 12/3/21 11:10 AM, Cliff Sojourner via 44Net wrote:
> Unfortunately, compression is considered a type of encryption so also
a no
no over the air. Apparently, even a common well-documented type such
as ZIP.
>
> We could run SSL with a NULL cipher over the air. Not much gain from
that,
though, because the HMAC is made to detect small number of bit
errors, but not at the rates we likely see over the air. And it is
detection only, no correction.
>
> Cliff K6CLS CM87
>
>
> On December 3, 2021 10:42:56 AM PST, "Tim Požar via 44Net" <
44net(a)mailman.ampr.org> wrote:
>> There have been two attempts to get the
FCC to allow encryption in Part
>> 97. RM-11699 in 2013 and RM-11831 in 2019. Both have been dismissed
by
>> the FCC. Please read these petitions and
you will see that encryption
>> is not allowed.
>>
>> Tim
>>
>> On 12/3/21 10:32 AM, Dave Gingrich via 44Net wrote:
>>>
>>> That is referencing phone ops, transmitting music, and coded words to
hide meaning. It certainly does not include encryption, using standards
based tools, such as SSH or SSL. I was using those methods over the radio
in the 1990s. IOW, that whole paragraph speaks to the purpose of the
transmission, not the traffic it generates.
>>>
>>> It will be near impossible to establish any type of network today,
that does not carry traffic that is not encrypted in some fashion. If that
is a requirement, we'd best just give up and shut off our radios.
>>>
>>> —
>>> Dave K9DC
>>>
>>>
>>>> On Dec 3, 2021, at 12:50, Tim Požar <pozar(a)lns.com> wrote:
>>>>
>>>> Please refer to § 97.113(a)(4) Prohibited transmissions...
>>>>
>>>> (4) [...] messages encoded for the purpose of obscuring their
meaning, except as otherwise provided herein [...]
>>>>
>>>> Tim
>>>>
>>>> On 12/3/21 9:45 AM, Dave Gingrich via 44Net wrote:
>>>>> Please point out where the "the USA encryption restriction” over
radio links, is documented. After all, D-Star radios use a proprietary
codec. Heck even if you access https://ampr.org/ over a radio link, the
connection is SSL encrypted, as are nearly all web sites in the world.
>>>>> Encryption over RF links has
not been illegal for years, at least
in .US. I can’t speak for other
jurisdictions.
>>>>> —
>>>>> Dave K9DC
>>>>>> On Dec 3, 2021, at 11:23, air gapped via 44Net <
44net(a)mailman.ampr.org> wrote:
>>>>>>
>>>>>> Something to keep in mind: the USA encryption restriction only
applies to traffic going over the air.
>>>>>> Networks can and do have
encryption as long as relay over air has
information in the clear.
>>>>>>
>>>>>> Adam Lewis
>>>>>> KC7GDY
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>>>
>>>
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