To be more specific I use a system with 3-part passwords. The first part is generated from the website/system. The second part is the code phrase - this is th

To be more specific I use a system with 3-part passwords. The first part is generated from the website/system. The second part is the code phrase - this is the part that I need to remember (and for passwords I use rarely - that I need to write down). The 3rd part is changing predictably every time the system is forcing me to change my password. The stuff I am writing down I'm writing using a script I created long ago for my TTRPG. It's not hard to decrypt if you had whole pages of it, but it's not a trivial substitution. I used it as a puzzle in my D&D campaigns for friends (including people with PhD in CS and MA in math) and they couldn't solve it over several weeks without a lot of hints. I don't think a random guy who broke in will solve it looking at a piece of paper with 10 or 30 symbols.