Charly's Column The sys admin's daily grind: Single-packet authentication

Sep 30, 2008

Conventional, woodpecker-style port knocking is open to sniffing and brute force knocking attacks. Sending an encrypted packet with an access request to the server is safer and more modern. Learn more about Firewall Knock Operator, a.k.a. Fwknop.

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Expert Security Intro Staying one step ahead of the intruders

May 31, 2008

Internet intruders have many ingenious ways of escalating privileges and hiding their presence once they get inside your system. The best protection is to keep them out in the cold.

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Enigmail Encrypting mail in Thunderbird

Apr 30, 2008

Combining the Enigmail add-on and the GnuPG encryption software gives Thunderbird users a powerful tool for encrypting and signing email.

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GnuTLS Version 2.0.0 Released

Sep 07, 2007

Version 2.0.0 of the GnuTLS security database improves access to X.509 certificates and adds RSA with SHA-256/384/512 certificates to the crop of supported crypto approaches.

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CD Encryption Burning CDs and DVDS with an encrypted filesystem

Oct 31, 2006

An encrypted hard disk on your server is no help if valuable data on CDs or DVDs falls into the hands of spies. We’ll show you some convenient solutions for encrypting data on removable media.

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Crypto Tricks Intro Disk-level cryptography in Linux

Oct 31, 2006

Today’s computers are fast enough for some very sophisticated cryptography techniques. We’ll show you how to keep your data safe from the prying eyes of snoops and spies.

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Encrypted Filesystems Shopping for an encrypted filesystem

Oct 31, 2006

If you’re not a security expert and you're looking for a crypto filesystem, you may be wondering about the alternatives. We took at a look at some popular crypto options for Linux.

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DM-Crypt/ LUKS Workshop: Encrypting hard disks with DM-Crypt and LUKS

Oct 31, 2006

Encrypting a home directory is easy. Encrypting your whole hard disk – including the root filesystem – takes a little more effort.

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