ZK Encrypted Card is a technology applying highly secure and irreversible encryption algorithm to 13.56MHZ IC card. It combines ZK information with client’s OEM information into one single card, and interlocks with a Green Label device, which ensures that the device only functions when its tailor-made encrypted card is used. This can effectively avoid unauthorized users from operating the device by other cards. ZK Encrypted Card also allows OEM information encryption. Agents can choose to set different secret keys for different projects, further upgrading security to a higher level.