ARUN,

Supercaps are large capacity (and hi-ESR) capacitors design for energy storage often called "double layer" due to fabrication techniques.

http://www.chipcenter.com/eexpert/b...an030.html


The tough part of security is detecting a breach.

What form of security (from a scenario basis) are you trying to maintain.

Propriety of your code? Mis-use of equipment?

I would suggest that the security scenario be carefully evaluated. Is the security intended to be maintained even in the case where a knowledgable party (a tech, engineer, james bond) must be defeated as well as an un-informed party?

For instance if you use negative voltage to zap the chip a "wise" intruder would lift the pcb trace if he had; foreknowledge, time, and access.

If the device is to be distributed these conditions are readily achieved even if by trial and error.

If the device is in a "security" scenario then the "tamper proof" context is often employed. That is the device protects itself by alarming the "intrusion".

regards,
p