Comment by alfiedotwtf
1 day ago
> This is insane!
Not as insane as it was in the early 2000s…
> while link-layer encryption has been standard practice in satellite TV for decades
Before Snowden, I would say 99% of ALL TCP traffic I saw on satellites was in unadulterated plain-text. Web and email mostly.
… the pipe was so fast, you could only pcap if you had a SCSI hard drive!
I was exposed to some of this as a teenager due to a (now dead) family member being heavily into telecoms. You could receive and process POCSAG (the protocol used by paging systems) to pretty much read the entire stream of unencrypted, plain text pager messages going out over the wire. You could also reprogram a generic pager to receive pages for whatever number you liked. You could also transmit your own POCSAG and send any number a page (only within your transmission range).
SMS was also a bit like this in its early days and you could read them coming off the local cell (also true of calls at a certain time, but I didn't see much of this).
I just did a quick search and apparently many pagers in the UK are still running cleartext POCSAG! https://www.reddit.com/r/RTLSDR/comments/1asnchu/are_uk_page...
Yeah POCSAG is not encrypted here in the UK. You can still see all the emergency information from around the country unencrypted in realtime. They even broadcast the details of the emergency and a lot of times it's not nice. You do/did get some bird watching sightings though!
This is still the case today in the US, plenty of pager systems run POCSAG or near equivalents. There is no conditional access or encryption of any kind. Receiving such signals is notionally criminal, but I'm unaware of any prosecutions for such a thing.
```… the pipe was so fast, you could only pcap if you had a SCSI hard drive!```
This is why NSA asked for (and got from SGI) a guranteed rate I/O API - to make sure that whstever the signal intelkigence platform sensors captured could be written to storage.