I have previously mentioned Mixmaster ont his blog, a great software tool to send anonymous email and also used to post to Usenet groups anonymously, but visiting a website in order to send an anonymous email is not a good idea because your IP will be logged by the site server. You could use a [...]

Mixmaster is is an anonymous remailer software. It encrypts your email messages before sending them, it typically fires off the messages through a series of anonymous proxies, you can choose how many and what proxies you want on the chain, it also provides protection against traffic analysis by delaying the sending of the messages at [...]

When working using bash, zsh, ksh or any other Unix shell the default is to save the history of the typed in commands, this can become a security and privacy risk. Stop the history file keeping a copy of typed in commands This can be used any time  you like assuming you have administrator rights [...]

This article is from 2007, I found it to be an excellent and detailed review of the most common tools that exist to encrypt data in Unix systems. These different tools and methods are still valid and in use nowadays. It provides some insights on encryption techniques, code quality, and the relative merits of the [...]

eCryptfs is a cryptographic filesystem embedded inside the Linux kernel (versions 2.6.19 and later), it is also a stacked filesystem, which means that eCryptfs is a layer that works on top of other standard, lower file systems, such as ext4, FAT32, XFS and ReiserFS. Some of the great advantadges of eCryptfs over other encryption methods [...]

This is a video tutorial from Christian Brüffer at MeetBSD 2007 in Warsaw, Poland. This video will teach you how to protect your privacy with tor and FreeBSD.

For those interested in staying up to date and taking part in computer security and privacy, these are some active mailing lists that deal with it: Off The Record (Encryption for IRC and IM) This list is used for open discussion about Off-the-Record (OTR) Messaging software. Subscribe at: http://lists.cypherpunks.ca/mailman/listinfo/otr-users Archived mailing list: http://lists.cypherpunks.ca/pipermail/otr-users/ The or-talk [...]

My favourite chat client is irssi, anyone who likes command line and shells will love irssi, it is aso a great tool for IRC operators not only users. Some IRC networks offer you a secure SSL chat but you will need to specify the port for this, the most common ports in IRC  for secure [...]

If you need to choose a password there is a Unix program called mkpasswd that will help you choose a strong one. Some examples: mkpasswd –char=10 This will generate a 10 char random password. You can also try: mkpasswd -s “insertwordhere” This will take the characters from the entered word, and create a password from [...]

This tutorial shows how you can use GnuPG to secure and verify data on your Linux box.