Door Key and locks and door electronic locks with keycards

Minecraft could benefit from a lock and key system for doors and containers. Locks could be crafted from materials like wood, stone, iron, diamond, and netherite, with higher tiers being harder to break. Physical locks would visually resemble padlocks that attach to existing doors rather than replacing them. When a lock is crafted, a matching key (or key card for electronic locks) is also crafted. The key can be bound to the lock by right-clicking it, permanently linking them so only that key can open it. Each lock has only one original key, but players can duplicate keys by combining the original key with the material used to craft it (for example, iron ingots for iron locks) using an anvil or another balanced Minecraft-style block. Physical locks would require a two-step process to open (unlock with key, then open door) and would simply break off with a loud sound if destroyed. Electronic locks using key cards would be harder to craft but allow doors to open automatically as long as the correct key card is in the player’s inventory, locking again when closed. If an electronic lock is broken, it would remain visibly damaged on the door and trigger a loud alarm sound instead of instantly disappearing, acting as a security system. This would be more intuitive than hidden buttons or redstone setups, reduce reliance on iron doors, and improve base security, roleplay, and multiplayer gameplay while fitting Minecraft’s progression and balance.