ok so i dont know if this is what you want but you can use levers and redstone torches on the other side of the block that you put the levers on, if you tick off every lever with a redstone torch behind it it will turn off a redstone signal. BASIC TUTORIAL:
I know there's a way to do this but I can't remember how to do it.
i don't think that's a thing apart from the securitycraft mod
- the dragonborn
Try doing a YouTube search for redstone code door. Several secure doors and things available there.
ok so i dont know if this is what you want but you can use levers and redstone torches on the other side of the block that you put the levers on, if you tick off every lever with a redstone torch behind it it will turn off a redstone signal. BASIC TUTORIAL: