On Sun, Feb 20, 2022 at 1:08 PM Jon "maddog" Hall via lpi-examdev < [email protected]> wrote:
> /* > I was just pointing out that some (e.g., LZ4/p7z) have program that are > getting blacklisted by the US, which does affect some American allies as > well, and definitely American companies operating in Europe (and > elsewhere). > */ > > I guess I missed something. The US is blacklisting compression > techniques? Or are they blacklisting encryption techniques? The latter I > could *almost* understand, but the former? > And that's something I brought up from the get-go, but has been lost in the various responses (along with other things).** ;) You are correct, it's only implements, not the algorithm, and some newer programs are available ... while some programs don't various aspects other than block -- e.g., p7z is becoming rather proflierated, and quite troubling. So ... do we 'step back' and do what some suggested ... and remove most or even all compression programs, and just leave the general concepts? Or do we need them to be aware of the lot? After this discussion, I'm almost at the point that only LZ77-gzip should be covered for everything from zImage to commands, with the note that others are available. DEFLATE is being commonly used in many algorithms now, as well as compression and/or archivers, with more and more focused on speed and program size (for embedded loaders). > > In any case, if you are going to remove specific packages of compression > techniques (fair enough), you should at least talk about the differences > between lossy vs lossless techniques and where they might be used and how > they might or might not be useful in combination with archiving tools > (lossy compression of archiving tool output is a recipe for disaster). > > These were all lossless algorithms and compression libraries/programs. - bjs **P.S. As always ... I try to avoid giving opinions (even if I call them at times), but try to analyze comments by others, first, and where there can be valid considerations as well as risks. It's up to others to remember the context I make things in -- e.g., the Ansible comment went way off where I even intended, and I never asserted only Ansible. Although in your case Maddog, it looks like you're reading the digest, which won't have it all.
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