A cryptographic nightmare...

A cryptographic nightmare...  Some French mathematicians have made a dent in the discrete logarithm problem that is at the heart of the Diffie-Hellman key exchange protocol and elliptic curve encryption – both widely used on the Internet.  So far their discovery is only useful for decrypting some much less-used cryptography, but they're working on extending it to a more generally useful tool.  If they succeed, their method will invalidate much of the cryptographic infrastructure that today allows secure transactions...