GnuTLS, the GNU Transport Layer Security Library, is a free software implementation of the Transport Layer Security protocols. GnuTLS is primarily licensed under the GNU Lesser General Public License; some parts are licensed under the GNU General Public License.

GnuTLS is comparable to OpenSSL , but OpenSSLs license is not compatible with the GPL [http://www.gnome.org/~markmc/openssl-and-the-gpl.html].

As GnuTLSs licensing is compatible with the GPL, it is used in software like GNOME , Centericq , Exim , Mutt (email client) , Slrn , Lynx (web browser) , and Common Unix Printing System .

GnuTLS version 1.2.6 was released on July 16, 2005.

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