Intel Secure Key, was previously code-named Bull Mountain Technology. It is the Intel name for the Intel 64 and IA-32 Architectures instruction RDRAND and its underlying Digital Random Number Generator (DRNG) hardware implementation. Among other things, the DRNG using the RDRAND instruction is useful for generating high-quality keys for cryptographic protocols.
Mathematicians from Europe and the United States are reporting a flaw in the RSA encryption method that apparently hinges on crypto keys being created with insufficient randomness.
Previously refered to as "Bull Mountain", the RdRand instruction will present itself on the upcoming "Ivy Bridge" platform coming out early 2012. The RdRand instruction paves the way to fast, reliable entropy generated on the processor resulting in highly robust random numbers!