• Internet Protocol Security (IPSec): IPSec is used for authenticity of two communicating hosts not users. Mostly used for building VPN and connecting a remote machine.
• Secure Socket Layer/Transport Layer Security (SSL/TLS): SSL/TLS works over TCP and tunnels other protocols using TCP, adding encryption and authentication of the server and optional authentication of client. SSL is in the process to be taken over by TLS.
• OpenPGP and S/MIME: Two competing incompatible standards for securing email.
• SSH: Used for securing remote terminals over internet
• Kerboes: Used for single sign-on and authenticates users against a central authentication and key distribution server

Disclaimer

The thoughts expressed in the blog are those of the author and do not represent necessarily the official policy or position of any other agency, organization, employer, or company. Assumptions made in the study are not reflective of the point of view(s) of any entity other than the author. Since we are critically thinking human beings, the point of view(s) is always subject to change, revision and rethinking at any time. While reasonable efforts have been made to obtain accurate information, the author makes no warranty, expressed or implied as to its accuracy.