A new SSL/TLS vulnerability dubbed as “LogJam attack” was disclosed by researchers today. The flaw exists in Diffie-Hellman Key exchange which is used by a number of popular protocols such as HTTPS, SSH, IPSec, and SMTPS. The Logjam attack affects any server that supports DHE_EXPORT ciphers and most of the modern web browsers which support short Diffie-Hellman parameters. According to data published by the researchers at weakdh.org, the vulnerability affects around 8.4% of the Top 1 million domains, 3.4% of HTTPS Browser Trusted Sites, 14.8%, 8.9% and 8.4% of Email servers using SMTP with StartTLS, POP3S and IMAPS respectively. The vulnerability is similar to FR