What is essential for Trustworthy Software?

What is essential for Trustworthy Software? Learn more about the Trustworthy Software Essentials scheme Following the announcement of the Trustworthy Software Essentials scheme by the Trustworthy Software Initiative (TSI), Nexor is pleased to announce its full support...

DNS Tunnelling

DNS Tunnelling August 2015 A recent project at Nexor required us to look at the challenges of providing access to the DNS from a secure environment. It reminded me of the issues related to DNS tunnelling. DNS tunnelling enables a user to run a full TCP/IP stack over...

Q: When is a Diode not a Diode?

Q: When is a Diode not a Diode? April 2015 A: When it’s a Transistor or a Zener diode. What is a Diode? A diode allows an electric current to pass in one direction while blocking current in the opposite direction. It works using a doped silicon P-N Junction. If...

More on Air Gaps

MORE ON AIR GAPS March 2015 While Air-Gaps are a good conceptual solution, in practice beyond Schneier’s single PC example, they are very hard to achieve. There is nearly always a backdoor to be found somewhere that an attacker can exploit. Opinion is divided,...

Non-Routable Protocols and Networks

Non-Routable Protocols and Networks March 2015 Network segregation is a common security technique to prevent security issues in one network affecting another. When looking at how information can be moved or shared between such networks the concept of routable...