Maltrail is a lightweight analysis tool that examines network traffic and raises the alarm if it detects suspicious access or dubious name resolution.

Digital camera images often reveal personal information embedded in metadata. Several Linux tools let you remove unwanted metadata to help preserve your privacy.

Fuzzing is an important method for finding bugs and security vulnerabilities in software. Read on to find out what fuzzing is and which methods are commonly used today.

Canonical's ufw lets you configure your firewall without the hassle of the iptables tool, while reducing the risk of misconfiguration and simplifying maintenance.

Improve communication security with GnuPG and the OpenPGP smartcard.

SiriKali encrypts files and directories with just a few mouse clicks, without the inefficiency of fixed-size containers.

The Integrity Measurement Architecture adds important details to your audit logs, making it easier to track an intruder's footprints.

TLS encryption is wonderful if it is running over a reliable transport protocol like TCP; but if your needs call for the less reliable UDP transport, you'd better start learning about DTLS.

The danger and irritations of the modern web have unleashed a movement dedicated to creating a safer and simpler alternative. The old Gopher network and the new Gemini protocol have emerged as building blocks for this new "small Internet."

Decoupled application design gets in the way of secure communication, but a little known feature of DNS can provide message security.