SSLv2 has been created by Netscape in 1995 and SSLv3 by the same company in 1996. From the start, SSLv2 showed weaknesses and has quickly been replaced by SSLv3. TLS is now, and since several years, the standard.<p>Those protocols, too often used, are vulnerable to Man In The Middle (MITM) attacks allowing a third part to intercept, modify and decypher transferred data.