There are some topics in security that sound very deep and complicated at first. Cryptoperiods is one of those. The first time I encountered this in a real project, I honestly thought it was something only big banks cared about. Later on, when I got more involved with HSMs, RKI processes, and PCI requirements, I…

Whenever I talk to people who are new in security or payments, one thing always surprises me. The moment I say the word keys they immediately think it is something complicated or something only seniors can understand. I get that feeling because I used to be the same. When I first touched topics like symmetric…

I want to share something that honestly took me years to fully understand. If you work in fintech, in payments, or anywhere near security and compliance, you will eventually hear this one document again and again. It is called NIST SP 800 57. To be honest, the first time I saw it, it felt like…