BBC News - 'Fresh proposals' planned over cyber-monitoring

Andrew Cormack Andrew.Cormack at
Sat May 11 17:21:28 BST 2013

> -----Original Message-----
> From: ukcrypto-bounces at [mailto:ukcrypto-
> bounces at] On Behalf Of Ian Batten
> Sent: 11 May 2013 15:50
> To: UK Cryptography Policy Discussion Group
> Subject: Re: BBC News - 'Fresh proposals' planned over cyber-monitoring
> On 10 May 2013, at 13:49, Andrew Cormack <Andrew.Cormack at> wrote:
> >
> > And the static mappings between port ranges and customers might
> arguably be covered by the current Data Retention Regs? And anyway
> represent only a similar volume of logs to current DHCP. That might
> explain the "may not need legislation" comment?
> But surely the problem would be that the actual services don't log
> source port numbers, and therefore even if you have the NAT mappings,
> you don't know which of the users who happened to be on a particular IP
> number was the user in question without the source port?
> ian

Errr. Good point :-(


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