PGP - Send Encrypted and Signed Message - gpg

Send a secret message over untrusted Internet. Encryption prevents anyone from reading your message. Signing protects your message from modification. Public keys allow you to establish trust without meeting physically.

This article shows how you can use PGP encryption with 'gpg' tool. We'll simulate two users to make it easy to practice. PGP is well known, highly secure standard for encryption.

Alice will send a signed, encrypted message to Tero. This is the most obvious, basic use of PGP.

Try Web Hacking on New Webgoat 2023.4

You can learn web penetration testing with Webgoat.

Just download the latest version, install Java with apt-get, set port and run.

Web Hacking with Santeri

Santeri shared his approach to web pen penetration testing. He visited my ethical hacking course.

Santeri's top 3 favourite vulnerabilities are

• IDOR (?id=123 => id=124, also OWASP 1.)
• Path traversal (../../../etc/passwd)
• Server Side Template Injection - My name is {{6*7}}

Fuffme - Install Web Fuzzing Target on Debian

Web fuzzers can find unlinked, hidden directories. They can also find vulnerabilities in query parameters.

This article shows you how to install ffufme pratice target and ffuf, the leading web fuzzer.

Infra as Code 2023

Control 10, 100, 1000 many computers.

Or control 2071 computers, like Jussi did on a earlier course. Or handle 7 different operating systems and OS versions with a single master, like Matias.

Best instance got 5.0 / 5 feedback - all respondents gave the best grade 5. Palvelinten hallinta ici001as3a-3006.

Trust to Blockchain 2023 autumn

Learn security fundamentals to understand current trends. Blockchains, TOR network and video conference encryption all stand on these fundamentals.

Excellent 4.9 out of 5 feedback.

Ethical Hacking 2023

Learn to hack computers to protect your own. In the course, you will break into target computers.

Excellent feedback, reached 5.0 out of 5.