Tag Archives: unix

Using Elliptic Curve with an OpenSSL PKI

OpenSSL is a tool that can be used to setup a (simple) PKI, but in its most basic form a command line tool with an endless amount of options. I find myself searching for the correct syntax of OpenSSL to … Continue reading

Posted in Crypto, IT Security, Shell script | Tagged , , , , , , , , , , , , , , | Comments Off on Using Elliptic Curve with an OpenSSL PKI

Email and malware dissection, Part II

If you’re running a mail server on the Internet, you will surely be familiar with spam and malicious email. This post is the last part on how to identify and isolate malware in email while respecting your users’ email privacy. … Continue reading

Posted in email, IT Security, malware, Perl, Shell script | Tagged , , , , , | Comments Off on Email and malware dissection, Part II

Email and malware dissection, Part I

Phishing, Trojans, Worms and other malicious activity in email. These series of posts make quite a lengthy write-up on how to use Unix shell script and Perl to dissect large amounts of email all at once without disrespecting email privacy … Continue reading

Posted in email, FreeBSD, IT Security, Linux, Mac OS X, malware, Perl, Shell script | Tagged , , , , | Comments Off on Email and malware dissection, Part I

Tinkering with file encryption

Storing files overseas or “in the cloud” has become somewhat of an issue lately with spying activities of various nations. I think we’ve just seen the top of the iceberg, but at the same time I hope I’m wrong. In … Continue reading

Posted in Crypto, FreeBSD, IT Security, Mac OS X, Shell script | Tagged , , , , | Comments Off on Tinkering with file encryption

Encrypted FreeBSD USB boot disk

It appears that USB attached storage devices resemble what floppy disks were back in the nineties. Back then, transporting floppies from one computer to another was very common. Unintentionally spreading malware and losing disks also. The risk of spreading malware … Continue reading

Posted in Crypto, FreeBSD, IT Security | Tagged , , , | Comments Off on Encrypted FreeBSD USB boot disk

Memoirs of email

Email. Practically everyone connected to the Internet has at least one email address. Not surprisingly: If you get connected to the Internet, one of the first things to do is inform your friends and family on how to reach you… … Continue reading

Posted in email | Tagged , , , , | Comments Off on Memoirs of email