Multiple encryption and changing the physical mode help prevent copying and cracking occurrences.

The Safety Star product line, with its "hard encryption and contact-based security shield," replaces the感应卡式万能手牌感应卡式万能手牌, eliminating the possibility of duplication at its source. The Security Shield can perform emergency unlocking, set locks, retrieve unlock records, and provide emergency power to the locks.

Traditional smart locks and universal hand cards are both carried by proximity cards. Universal hand cards can unlock all locks within the venue. However, proximity cards can be quickly read and copied by specialized equipment.

Especially in recent years, theft through illegal duplication of the Universal Hand Card has reached epidemic proportions.