I want to read papers on cryptography like How to Recycle Random Bits or Security Preserving Amplification of Hardness. They use random walks on expander graphs.
I need a short introduction to the subject of expander graphs and random walks on them. I prefer one that has cryptography in mind.
PS: In another post, Dai Le introduced the paper Expander graphs and their applications, S. Hoory, N. Linial, and A. Wigderson as an excellent paper on expander graphs. Unfortunately, it is too long (123 pages) to be useful for me.