Letters to the Editor, February 25, 2013
It was shocking to see the woeful ignorance of the basic principles of security betrayed by Ms Regina Ip. For someone who was once secretary for security, not to have an understanding of identification and authentication, and the difference between them, is a very sad reflection of the calibre of politicians here.

It was shocking to see the woeful ignorance of the basic principles of security betrayed by Ms Regina Ip in her letter ("Webb's stunt disregarded security risks", February 21).
For someone who was once secretary for security, not to have an understanding of identification and authentication, and the difference between them, is a very sad reflection of the calibre of politicians here.
It is clear to anyone with any understanding of this issue that a Hong Kong identity number is simply an identifier, just like a name, but with the benefit of being unique.
A quick Google search of my name, Paul Christensen, suggests that there is at least one other Hong Kong resident with the same name and one more person who visits regularly.
To identify which Paul Christensen I am, I offer my identity number: P893385(9). This is not secret information. But authenticating that I am who I am is a separate matter.
In the case of the identity cards, authentication is provided with a moderate level of security by the digital photo on it, with a somewhat higher level of security by the digitised thumbprint encoded on its chip.