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GCHQ taps fibre-optic cables for secret access to world's communications

guardian.co.uk

11–20 of 51 posts

Re: GCHQ taps fibre-optic cables for secret access to world's communications

#11
post #6

This being more or less the entire stated mission of GCHQ, I wonder who's actually surprised by this revelation.

People who are still locked into the mold of Henry Stimson, I would imagine.

I think people are more surprised that their own traffic is falling into this and not just diplomatic/military signals. But that's one of the unintended consequences of communications in general shifting over to Internet methods instead of dedicated circuits.

Re: GCHQ taps fibre-optic cables for secret access to world's communications

#12
post #10
post #5

Earlier quoted context omitted.

Not by default on every account. I have recently changed settings on couple of my friends account to force SSL.

What is the current understanding regarding the crackability of SSL?

The encryption (if implemented correctly) is good, but if an intelligence agency has access to a Certificate Authority, or the target of your communications, man-in-the-middle attacks are feasible.

In short, nothing is safe anymore.

Re: GCHQ taps fibre-optic cables for secret access to world's communications

#13
Since this is part of GCHQ's mission, and publicly declared on their recruitment website, it shouldn't be that surprising.

(http://www.gchq-careers.co.uk/about-gchq/about-gchq/)

> As one of the UK's intelligence and security agencies, we gather and analyse digital and electronic signals from many channels, from all corners of the world. Converting this information into intelligence material, we play a significant role in informing national security, military operations, police activity and foreign policy.

Re: GCHQ taps fibre-optic cables for secret access to world's communications

#14
post #13

Since this is part of GCHQ's mission, and publicly declared on their recruitment website, it shouldn't be that surprising. ( http://www.gchq-careers.co.uk/about-gchq/about-gchq/ ) > As one of the UK's intelligence and security agencies, we gather and analyse digital and electronic signals from many channels, from all corners of the world. Converting this information into intelligence material, we play a significant r…

[deleted]

Re: GCHQ taps fibre-optic cables for secret access to world's communications

#15
post #6

This being more or less the entire stated mission of GCHQ, I wonder who's actually surprised by this revelation.

Perhaps people shouldn't be surprised, but the discussion of the data sharing with the NSA certainly appears to call into question some of the US government's claims:

"This includes recordings of phone calls, the content of email messages, entries on Facebook and the history of any internet user's access to websites – all of which is deemed legal, even though the warrant system was supposed to limit interception to a specified range of targets....

By May last year 300 analysts from GCHQ, and 250 from the NSA, had been assigned to sift through the flood of data."

Re: GCHQ taps fibre-optic cables for secret access to world's communications

#16
post #12
post #10

Earlier quoted context omitted.

What is the current understanding regarding the crackability of SSL?

The encryption (if implemented correctly) is good, but if an intelligence agency has access to a Certificate Authority, or the target of your communications, man-in-the-middle attacks are feasible. In short, nothing is safe anymore.

Or if Facebook have handed over their private key, etc.

Re: GCHQ taps fibre-optic cables for secret access to world's communications

#17
post #10
post #5

Earlier quoted context omitted.

Not by default on every account. I have recently changed settings on couple of my friends account to force SSL.

What is the current understanding regarding the crackability of SSL?

It has been discussed over and over on hackernews recently so just tldr version. Let’s consider two scenarios. 1) NSA forces CA to issues a certificate for google.com and decide to man-in-the-middle you. In that case there is a mechanism call certificate pinning. To put it simply certificates of Google, Facebook, Twitter etc. are hard coded into Firefox and Google Chrome. (Microsoft provides this ability in IE using latest EMET 4.0). So if someone tries to send you cert for google, which doesn’t match the one hardcoded your browser would get crazy and issue a big red warning :) 2) NSA records your encrypted communication with Google and later obtains Google private key (either by factoring Google public key or using some secret court order or whatever). In this case they CAN’T decrypt your communication with Google because Google uses version of Diffi- Hellman protocol with so called ephemeral keys. More here http://googleonlinesecurity.blogspot.com/2011/11/protecting-.... Ephermal DH is not implement by many sites (hackernews does it, facebook doesn’t)

SSL can be broken in myriad of different ways but at least in these two scenarios you are to certain degree safe

Re: GCHQ taps fibre-optic cables for secret access to world's communications

#18
post #6

This being more or less the entire stated mission of GCHQ, I wonder who's actually surprised by this revelation.

Yes but one month ago they still had plausible deniability, not anymore. In short the term it may change nothing but in the long run it will have an impact, no doubt.

Re: GCHQ taps fibre-optic cables for secret access to world's communications

#19
post #18
post #6

This being more or less the entire stated mission of GCHQ, I wonder who's actually surprised by this revelation.

Yes but one month ago they still had plausible deniability, not anymore. In short the term it may change nothing but in the long run it will have an impact, no doubt.

I'm confused as to how anyone could have believed that one of the 5 largest signals intelligence agencies in the world could not have been tapping Internet backbone cables.

Can we just resolve this right here? The Internet backbone is tapped. To whatever extent NSA isn't looking at our traffic (or is pretending not to, or pantomiming not doing it), some other foreign SIGINT agency is.

To believe otherwise is to believe that state-sponsored intelligence agencies somehow believe the Internet is off limits to surveillance because I don't know freedom and progress or something. Of course they don't believe that.

Re: GCHQ taps fibre-optic cables for secret access to world's communications

#20
post #6

This being more or less the entire stated mission of GCHQ, I wonder who's actually surprised by this revelation.

Not at all surprised.

In the late 1990s I worked for the UK subsidiary of a large US defence contractor. They had an international network which connected their subsidiaries to transfer documents, emails and engineering drawings. Most work was done for the US DoD. This was a typical leased ISDN system from BT.

It had cryptos at each end of a link (each in a literally a 2m by 2m room declared US soil by the then home secretary).

The biggest threat vector they had was actually listed as GCHQ and the line would suspiciously go down occasionally for a few ms resulting in the cryptos being "red buttoned" (key erasure).

A telling tale if any.

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