Wearable Microphone Jamming

[AstonJ]

Can it jam RFIDs which basically every passport has and requires no batteries

The Cold War spy technology which we all use

Also mentioned here:

Hacking - what are the weak points of your system?

Sitting here cleaning my keyboard and mouse, wondering what the weak points are in system (or even personal) security. What are you thoughts, and what lengths do you go to to stay safe? A few of random links on topics that came to mind - the last one may be of particular interest, we all have these in our passports! (At least here in the UK)