Safe is a kind of safety equipment, which is usually located in the vault, or in banks and post offices. The safe contains precious stones, precious metals, money or important documents, such as wills and property contracts. People don't choose to keep them at home, for theft prevention, fire prevention, flood control and attack prevention, or for various reasons. According to a specific agreement, before using the safe, the lessee must pay the bank, and the safe can only be opened with a special key, a master key of the bank, a unique signature or passwords of various attributes. In addition, some banks use human identification technology to enhance security. The history of the safe can be traced back to the Middle Ages. In medieval paintings, you can occasionally see a wooden cabinet filled with gold, silver and jewels, which is the prototype of a modern safe. It is a wooden safe with gold, silver and jewels by Louis XV in the18th century, which was copied by the famous French safe manufacturer FICHE-BAUCHE. This kind of safe looks like furniture, and has no special lock, so its security is low. Until the beginning of19th century 200 years ago, with the growth of social economy, the safe industry began to develop, and specialized lock manufacturers appeared in Europe.

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