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Attack on Sun ’ s MIDP Reference Implementation of SSL

Key generation on resource-constrained devices is a challenging task. This paper describes a proof-of-concept realization of an attack on Sun’s reference implementation of the Mobile Information Device Profile (MIDP). It is known that the MIDP implementation has a flaw in the generation of the premaster secret in SSL. Our attack exploits the flaw to recover the symmetric keys used in an SSL session.