@cindex SSL 2
One of the initial decisions in the @acronym{GnuTLS} development was
-to implement the security protocols for the transport layer.
+to implement the known security protocols for the transport layer.
Initially @acronym{TLS} 1.0 was implemented since it was the latest at
that time, and was considered to be the most advanced in security
properties. Later the @acronym{SSL} 3.0 protocol was implemented
2.0 in the library. There are several reasons, most important being
that it has serious security flaws, unacceptable for a modern security
library. Other than that, this protocol is barely used by anyone
-these days (it has been deprecated since 1996).
+these days since it has been deprecated since 1996.
@cindex PCT
Other protocols such as Microsoft's @acronym{PCT} 1 and @acronym{PCT}