[$] Breaking Libgcrypt RSA via a side channel

A recent paper [PDF] bya group of eight cryptography researchers shows, once again, howcryptographic breakthroughs are made. They often start small, with just areduction in the strength of a cipher or key search space, say, but then growover time to reach the point of a full-on breaking of a cipher or theimplementation of one. In this case, the RSAimplementation in Libgcryptfor 1024-bit keys has been fully broken using a side-channelattack against the operation of the library-2048-bit keys are alsosusceptible, but not with the same reliability, at least using this exacttechnique.