Double-interface encryption memory card and management method and system of data in double-interface encryption memory card

Abstract

The invention discloses a double-interface encryption memory card with a USB (universal serial bus) interface and a RFID (radio-frequency identification) interface, and a management method and system of data in the double-interface encryption memory card. The management method comprises the steps that the USB interface is used for connecting with a PC (personal computer) to carry out data reading / writing, and the RFID interface is used for receiving and sending radio-frequency signal, and receiving a security command from the radio-frequency signal; the data in the card is stored after encryption; in an initialization stage, the double-interface encryption memory card generates a data key and stores the data key; in a use state, the data key in the double-interface encryption memory card is in a null state, when a first radio-frequency reading / writing device is activated in a used area, the data key is in a usable state, and the data key is used for encrypting and decrypting the data and completing the reading / writing operation; and in a destroy stage, when the double-interface encryption memory card enters a destroy area, the destroy command sent by a second radio-frequency reading / writing device is received and executed so as to destroy the stored data key. By the adoption of the scheme disclosed by the invention, the data security and data transmission speed are improved.

Description

technical field [0001] The invention relates to data processing technology, in particular to a double-interface encryption memory card, a data management method in the double-interface encryption memory card, and a data management system in the double-interface encryption memory card. Background technique [0002] In the prior art, portable storage devices such as USB flash drives are often used to transfer data conveniently and quickly. With the improvement of user requirements for data security and the continuous development of technology, in order to prevent the leakage of user data after the loss of USB flash drives, there are Several protection methods for the data in the U disk are introduced. [0003] 1) Software encryption: the U disk itself has no encryption function, and the data is encrypted by the encryption software on the personal computer (PC, Personal Computer), and then the encrypted data is stored on the U disk. [0004] 2) File hidden U disk: The files in...

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Problems solved by technology

[0010] For mode 3), although the data therein is stored in the form of ciphertext, it can prevent the data leakage therein after the U disk is lost, but it cannot prevent the user who has the use authority and knows the password from intentionally leaking the data therein;

[0011] For mode 4), the contact communication of the dual-interface card adopts the integrated circuit (IC, Integrate Circuit) card interface, so it will cause the data transmission speed to be very slow, which is not suitable for storing large amounts of data, and the transmission rate of the contactless interface is also far away. Not as fast as the Universal Serial Bus (USB) interface

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