Install gnutls-doc by entering the following commands in the terminal:
sudo apt update sudo apt install gnutls-doc
Description:
GNU TLS library - documentation and examples
GnuTLS is a portable library which implements the Transport Layer Security (TLS 1.0, 1.1, 1.2) and Secure Sockets Layer (SSL) 3.0 and Datagram Transport Layer Security (DTLS 1.0, 1.2) protocols. . GnuTLS features support for: - TLS extensions: server name indication, max record size, opaque PRF input, etc. - authentication using the SRP protocol. - authentication using both X.509 certificates and OpenPGP keys. - TLS Pre-Shared-Keys (PSK) extension. - Inner Application (TLS/IA) extension. - X.509 and OpenPGP certificate handling. - X.509 Proxy Certificates (RFC 3820). - all the strong encryption algorithms (including SHA-256/384/512 and Camellia (RFC 4132)). . This package contains all the GnuTLS documentation.
Homepage: http://www.gnutls.org/
Version: 3.5.18-1ubuntu1
Section: doc