Ricardo van der Linden | Security Analyst

Welcome to my blog, I started blogging to give knowledge back to the community. In IT, there are numerous question marks that we have all encountered. We help each other by sharing our knowledge.

Understanding S/MIME: Enhancing Email Security

Unlocking the Power of S/MIME: This article will help you understand S/MIME and how to request, configure, and use S/MIME on your devices. What is S/MIME? In today’s digital landscape, the security of sensitive information transmitted via email is critical. One method of safeguarding email communications is through the use of S/MIME (Secure/Multipurpose Internet Mail Extensions). S/MIME is a widely adopted protocol that provides end-to-end encryption and digital signatures, ensuring the confidentiality, integrity, and authenticity of email messages....

April 6, 2024 · 5 min

Microsoft Defender for Office 365: Attack simulation training

With Microsoft Defender for Office 365, you can create an attack simulation training to identify vulnerable users and mitigate potential threats before they impact your organization. Think before you click Understanding the intricacies of cybersecurity is crucial in today’s digital landscape. Attack simulation training is indispensable for users as it provides hands-on experience in recognizing and defending against potential threats. This proactive approach empowers individuals to enhance their security awareness, identify vulnerabilities, and contribute to a more resilient organizational defense against cyber attacks....

February 3, 2024 · 3 min

DNSSEC and DANE explained

In this post, you find out how DNSSEC and DANE cooperate, and learn how to set up DANE TLSA DNS records. DNSSEC (Domain Name System Security Extensions) The domain name system (DNS) is the phone book of the Internet: it tells computers where to send and retrieve information. Unfortunately, it also accepts any address given to it, no questions asked. DNSSEC adds a security layer to this phonebook. It uses digital signatures to make sure the information in the phonebook can be trusted and hasn’t been tampered with....

January 13, 2024 · 4 min

Microsoft Defender for Office 365: Safe Links policies

Safe Links examines emails, Teams messages, and Office 365 apps for malicious links. It scans and alters URLs in incoming emails and verifies links at the time of clicking. What you can manage with a Safe Links policy By default, there is no existing default Safe Links policy. The security policy preset, “Built-in protection,” ensures Safe Links protection for email messages, Microsoft Teams, and files within supported Office apps....

December 29, 2023 · 3 min

Microsoft Purview: Purging mails from Inboxes

You can use Microsoft Purview to search for specific content in Exchange Online and, if desired, initiate a purge process. This article provides instructions on how to do this. Before getting started Note that you can also use Threat Explorer in MDO to initiate a hard delete by performing a manual remediation However, when using Threat Explorer, you are limited to 30 days, which is sufficient for most remediation scenarios....

December 23, 2023 · 2 min