What do i need to start reverse engineering?

I want to know what should i learn to become a reverse engineer?..Like Geohot i wan开发者_Python百科t to be able to revese engineer ps3 and iphone to make jailbreaks ..:D

I highly recommend this book: Reversing - Secrets of Reverse Engineering

You need a tool to reverse engineer binaries , for instance OllyDbg for windows apps(c/c++).