credativ® Blog
Here you will find interesting news about industry-specific topics and us.
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Jan Bolle
about the person
Jan arbeitet seit 2020 an Projekten des Support–Teams und der Internen IT, nachdem er bereits sein Praktikum im Rahmen seines Informatikstudiums bei credativ absolvierte und auch seine Bachelorarbeit zum Thema Einmalpasswörter, Zwei–Faktor–Authentisierung und OpenVPN bei credativ schrieb. Bereits zu Schulzeiten interessierte er sich für Freie Software, Netzwerke und Telekommunikation und richtete zusammen mit Mitschülern ein Internetcafé ein, auf dessen Server und Clients Debian GNU/Linux seinen Dienst verrichtete.
15 March 2022
Introduction to AppArmor
Fundamentally, access control under Linux is a simple matter: Files specify their access rights (execute, write, read) separately for their owner, their group, and finally, other users. Every process (whether a user’s shell or a system service) running on the system operates under a user ID and group ID, which are used for access control. […]
22 June 2021
Self-hosted Yubico OTP
In the preceding article, Two-Factor Authentication with Yubico OTP, we demonstrated how quickly existing services can be extended with two-factor authentication (2FA) using Yubico OTP with the help of the PAM module pam_yubico. The validation service used, the YubiCloud, is provided by Yubico free of charge. However, the fact that you are bound to an […]
10 December 2020
Create QR Codes for TOTP Secrets
The article Two-factor authentication for OpenSSH and OpenVPN presented a simple way to increase the security of PAM-enabled services through two-factor authentication. The TOTP method used generates a one-time password that is valid for a limited period of time based on a shared secret. Depending on the method and encoding, the shared secret consists of […]