The SSH Cryptosystem

Monday, 18 November 2002, 12:42 PM EST

In this article you'll see how the SSH cryptosystem provides privacy protection, integrity, and authenticity of data as it traverses a network.

If you're using at least FreeBSD version 4.0, your FreeBSD system uses OpensSSH and it is installed and ready to go. As the name implies, this is an open source implementation of the SSH cryptosystem.

In a previous article I demonstrated that the telnet utility can be used to login to a remote computer from another system. Once logged in, a user can do anything on that remote system as if he were physically sitting in front of it. That is, every keystroke is sent to the remote system and interpreted as if it had come from the keyboard attached to that remote system (even though that keyboard input first had to travel over a network). We also saw in that article that every single keystroke and response was sent in clear text, meaning that a sniffer could watch the entire session.

[ Read more ]


How to talk infosec with kids

Posted on 17 September 2014.  |  It's never too early to talk infosec with kids: you simply need the right story. In fact, as cyber professionals itís our duty to teach ALL the kids in our life about technology. If we are to make an impact, we must remember that children needed to be taught about technology on their terms.

Weekly newsletter

Reading our newsletter every Monday will keep you up-to-date with security news.

Daily digest

Receive a daily digest of the latest security news.


Fri, Sep 19th