Martin McCormick wrote: > deloptes <delop...@gmail.com> writes: >> I just wonder why one would do that, but it is again your business. > > In all but a very small handful of countries around the > world, the hobby of amateur radio exists and it's justification > for existence is to allow people to self-train as to how > electronic communication, especially radio, works. The vast > majority of radio amateurs do not do destructive things with the > knowledge they gain but listening to non-amateur communications > systems and understanding how they work is part of the hobby. > So, we do things that may seem really strange to those who don't > look at technology that way. > > Computers fit right in to this hobby also as they are > part of modern life. > >> Nowdays >> all of this communication is encrypted and you have virtually no chance >> listening to this. > > When the day comes in which all radio communications are > encrypted except for amateur radio where encryption is illegal, > we will probably stop listening to signals other than amateur > radio and broadcasting. > > Right now, much is still in the clear. It may be > digitally encoded but the coding standards are either to > improve reception, compress bandwidth or both. If they are to > obscure the conversation from eaves-droppers, then the landscape > gets more complicated regarding the law. >
I was thinking it is forbidden for amateur radio, because theywant to listen to you. >> In most of the countries it is even illegal, but ok, >> one >> can do things for fun anyway - braking the encryption though is close to >> impossible. > > That is quite true. some of the encoding schemes involve > more than one layer of encryption and use 1024-bit keys or > something similar so a person who doesn't know the key or keys > involved probably doesn't have enough seconds in his or her > natural life to break even 1 set of keys much less deal with the > key-holders changing the keys every hour or so. There are far > better ways to spend one's life. > Look at the wikipedia link I shared - it talks about the keys >> The communication follows well defined protocol, so knowing it, you might >> be >> able to read the frames, but the content will remain hidden. > > Quite true. > > In the case of what I am doing, a web site for scanner > radio enthusiasts published the frequencies and the logical order in > which they should be entered in to a receiver but the index > numbers turned out to be wrong due to changes made to the site > after the information was published. The control data includes > the index number for the channel to which a conversation or part > of one is assigned so one can learn the list by reading the index > numbers and observing which channels come to life. This allows > one to fix the list correctly. It's like solving a partly > assembled puzzle. > > Sorry for getting far afield of the original topic. > > Martin WB5AGZ Why don't you get the documentation or at least what is publicly available and solve it? regards