How to secure unique identification of physical resources in a distributed system?

I’m attempting to build a mechanism to prevent frauds and provide traceability of physical resources in a distributed system. The idea is straightforward: the resource travels hop-by-hop on a network and each hop is held by a… Continue reading How to secure unique identification of physical resources in a distributed system?

What are the real physical risks of casual social media publishing?

aka “how to scare my family into stopping publishing their life online?”

I do not publish personal photos / opinions publicly online as a rule. I never gave hard thoughts about that but I believe that one should either expli… Continue reading What are the real physical risks of casual social media publishing?

4-dial combination padlock: Is it more secure to zero it out or to blindly spin the dials after locking?

I am partially responsible for some resources protected by a 4-dial combination lock like this one:

There are two things that people will usually do after they’ve locked it:

reset all the digits to 0, so that the combination reads 0000… Continue reading 4-dial combination padlock: Is it more secure to zero it out or to blindly spin the dials after locking?