Authentication mechanism for low memory, low computing power device I am looking for an authentication mechanism that works best with low memory, low computing power devices. I came across a paper "A Practical Zero-Knowledge Protocol Fitted to Security Microprocessor Minimizing Both Transmission and Memory" which is released in 1988. 

Couldnt find any recent papers. Is it the best one or am I missing some ?

UPDATE:

I have a case where I have few processors connected to a gateway processors. I can send upto 64 bits of data at a time. Computing power is low in the sense that I cant employ something like AES-128 algorithm in all chips. I also need to minimize the number of bits of data send for authentication
SRP doesn't require very much memory, has a low transmission cost (4 packets), and its CPU usage isn't very high (less than 1 second on a low-end 32-bit CPU, but higher on something like an 8-bit CPU).

http://en.wikipedia.org/wiki/Secure_Remote_Password_protocol