Welcome to my place

Sebastian Zdrojewski

Sebastian En3pY Zdrojewski

About me

I have been working as an IT professional since late 1990s. I had the chance to build a horizontal skillset that allowed me to approach almost any IT related project. Since 2005 my role has mainly been as CTO in different companies, spacing between small ISPs and System Integrators. My main area of interest has been IT Architecture, Network and Data Security and protection.

Since 2017 I am workig on a new platform for Intellectual Property and Copyright assets protection and management and founded a company called Rights Chain. The Company's vision is to create a comprehensive platform for effective management and protection of Intellectual Property and digital assets, as well as facing ethical issues like Reputation and Privacy.

  • Services Includes


Networking, Infosec, general knowledge about IT architectures and more specific technologies.


Firebox Systems installation, migration and performance tuning, as well as on-site high-profile training.


Design, Implementation and Troubleshooting local or distributed corporate or datacentre networks.


Training or Feasibility study for Blockchain technology adoption and process management.

Data Protection

Digital Data assessment and protection, GDPR proceeding analysis, best practices and guidelines.

  • From my Blog


How to factory reset a ZyXEL Nebula cloud controlled Switch you lost access to (unofficial)

Got a #Nebula #ZyXEL #switch and can't figure out how to #factory #reset it? Here's a way you may find useful to get out of the trouble.

  • 10/08/2020

(Fiction) The false sense of safety driven by privacy: applications for health data tracking

We send daily tons of data to private giants who use that information to sell us things we don’t need and spread more unreliable news

  • 21/04/2020

Blockchain for digital content signature and integrity check

Few weeks ago I started a few posts to talk about #blockchain and its pratcital #applications. Here comes an idea of using it as an extension of #Digital #Signature for #Digital #Content and a mean of #governance #enforcement.

  • 18/01/2020

Increased rate of banned IPs for SSH bruteforce

Since the beginning of the year I found an intensive raise of SSH attempts on a home device.

  • 05/01/2020

Blockchain use cases vs Blockchain religion

If you are looking for a post where Blockchain is described as the “new disruptive technology” that will change the world, this is not one of it. You will probably find more “don’ts” rather than “do’s” in this post, so if you care to lose some time on it, please, be my guest.

  • 10/12/2019
  • Contacts

Data Protection & Copyright


Networking & IT

Coming soon

Social Profile