Take the 2-minute tour ×
Information Security Stack Exchange is a question and answer site for Information security professionals. It's 100% free, no registration required.

Most people are aware there are two types of RFID tags, active tags (ones that contain a power source of some kind) and passive tags (ones that are powered by the RF field).

I'd like to know if choosing one type or the other provides a security advantage? Does the ability to power passive tags only via RF field mean that it is harder to implement secure designs? Are there any other security concerns I should consider when choosing RFID systems?

share|improve this question

1 Answer 1

up vote 3 down vote accepted

Network bandwidth is a scarce resource in RFID protocols.

Active tags have a double edge sword when it comes to security. For one they are able to support more bandwidth and therefore larger key sizes. The "problem" is that active tags also have a longer range, and there for an attacker further away is able to obtain a challenge response. Passive tags have a shorter range, and are limited in the cryptographic algorithms they are able to use...

So what is your implantation? Ideally you would have a faraday cage to protect your active tags when they are not in use.

share|improve this answer

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.