Feeds

GCHQ man: Powerline networks do interfere with radio

Spook not a beardy radio ham, but is moustachioed

Gartner critical capabilities for enterprise endpoint backup

D Notice A document prepared by the spectrum manager of secret UK listening agency GCHQ, though disavowed by the organisation, has drawn more attention to the interference kicked out by powerline networking kit.

The letter was prepared by [a government employee we have been asked not to name], of government-spy outfit GCHQ, and suggests that powerline networking kit is already interfering with GCHQ's clandestine listening operations. But, after being leaked to the radio-ham community in March, the letter was officially renounced by the organisation as never being an official document and containing various inaccuracies.

The letter was prepared in May, leaked in March, and posted on the Ban PLT web site. At first glance it appears quite damning, stating that GCHQ is "already measuring an increase in the HF noise floor in the vicinity of our HF receiving stations, with wide variations between day time and night time levels", though it goes on to state that seasonal and meteorological factors also impact signal strengths.

If power line networking is causing headaches for our spies then that's a serious issue, and PLT kit certainly operates right in the bands used by the Numbers Stations.

Numbers Stations are mysterious radio broadcasts that have been around since the 1950s. They transmit what appear to be random numbers, spoken aloud, and are assumed to be broadcast instructions for operating spies. The stations are plainly important to the UK intelligence services in their own right, and there are other uses of long-range HF that GCHQ needs to listen in on: HF is still commonly used in naval communications, for instance, even if it no longer carries much international phone traffic.

So it would appear that it's not just the bearded-radio-ham community which objects to PLT, except that [the person we have been asked not to name] is a fully-paid up member of that community. He doesn't have a beard, just a moustache, but he is a keen radio amateur as well as working for GCHQ.

That doesn't invalidate his opinion, as expressed in the letter, but in distancing itself from that opinion GCHQ has stated that PLT kit isn't impacting its operations. It is possible that GCHQ is lying, one should expect a certain amount of deception from one's spies, but it's more likely the organisation places its listening stations well away from anywhere people might be using power line kit.

The subject of PLT interference will get into the houses of Parliament again on Wednesday as Mark Lancaster, MP for Milton Keynes North, has raised it as an adjournment debate (a 30-minute conversation) following a request from one of his (radio ham) constituents.

Which is another way that the ham community is fighting hard to raise the profile of interference generated by PLT kit, while the regulator (Ofcom) still denies there is any interference and points out that it couldn’t do anything even if there was.

Most end users of radio, just trying to get their fix of Chris Evans in the morning, will just buy a bigger aerial, or complain that DAB isn't as good as FM used to be, never knowing that it's their home networking kit which is causing the problems: unless the hams keep telling them. ®

Updated to Add

Having been contacted by a GCHQ representative under the provisions of the DA Notice system (formerly D-Notice) we have removed the name of the GCHQ spook in question and are no longer linking to the document. Not everyone is as patriotic as us, though, so if you're interested you can almost certainly find out both.

5 things you didn’t know about cloud backup

More from The Register

next story
Trying to sell your house? It'd better have KILLER mobile coverage
More NB than transport links to next-gen buyers - study
iWallet: No BONKING PLEASE, we're Apple
BLE-ding iPhones, not NFC bonkers, will drive trend - marketeers
Auntie remains MYSTIFIED by that weekend BBC iPlayer and website outage
Still doing 'forensics' on the caching layer – Beeb digi wonk
Scotland's BIG question: Will independence cost me my broadband?
They can take our lives, but they'll never take our SPECTRUM
NBN Co adds apartments to FTTP rollout
Commercial trial locations to go live in September
Samsung Z Tizen OS mobe is post-phoned – this time for good?
Russian launch for Sammy's non-droid knocked back
Speak your brains on SIGNAL-FREE mobile comms
Readers chat to the pair who flog the tech
prev story

Whitepapers

7 Elements of Radically Simple OS Migration
Avoid the typical headaches of OS migration during your next project by learning about 7 elements of radically simple OS migration.
Implementing global e-invoicing with guaranteed legal certainty
Explaining the role local tax compliance plays in successful supply chain management and e-business and how leading global brands are addressing this.
Consolidation: The Foundation for IT Business Transformation
In this whitepaper learn how effective consolidation of IT and business resources can enable multiple, meaningful business benefits.
Solving today's distributed Big Data backup challenges
Enable IT efficiency and allow a firm to access and reuse corporate information for competitive advantage, ultimately changing business outcomes.
A new approach to endpoint data protection
What is the best way to ensure comprehensive visibility, management, and control of information on both company-owned and employee-owned devices?