Method for Implementing Encryption and Device Thereof

• US 20110185173A1
• Filed: 12/08/2005
• Published: 07/28/2011
• Est. Priority Date: 06/30/2005
• Status: Active Grant

• Current Assignee: Legend Holdings Limited, Lenovo (Beijing) Limited (Lenovo Group Ltd.)
• Original Assignee: Legend Holdings Limited, Lenovo (Beijing) Limited (Lenovo Group Ltd.)
• Inventors: Liu, Yonghua
• Granted Patent: US 8,874,910 B2
• Time in Patent Office: Days
• US Class Current: 713/168
• CPC Class Codes: H04L 2209/60 Digital content management, e.g. content distribution
• CPC Class Codes: H04L 2209/80 Wireless network architectures or network communication protocols for wireless network security H04W12/00
• CPC Class Codes: H04L 9/3226 using a predetermined code, e.g. password, passphrase or PIN network architectures or network communication protocols for supporting authentication of entities using passwords in a packet data network H04L63/083

Abstract

The present invention provides an encryption method in which the encryption device stores data to be encrypted received via the input/output interface in its own memory, converts the data to be encrypted in the memory into a format required by the output device and transmits the converted data to the output device via the management interface, and the output device outputs the received information. The present invention also provides an encryption device for implementing the above method. The encryption device determines whether confirmation information has been received from a management interface, encrypts the data to be encrypted in the memory if the answer is positive, while performs no encryption or prompts to input correct confirmation information if the answer is negative. With the present invention, the user is allowed to view the contents to be actually encrypted, thereby avoiding such a case as signature counterfeiting or tampering.

Claims

1. An encryption method applicable to an encryption device including an input/output interface, a management interface and an output device, the method comprising the steps of:

a. storing, by the encryption device, data to be encrypted received via the input/output interface in a memory of the encryption device, converting the data to be encrypted in the memory into a format required by the output device, transmitting the converted data to the output device via the management interface and outputting the received information by the output device;

b. determining, by the encryption device, whether confirmation information has been received from the management interface, encrypting the data to be encrypted in the memory if the answer is positive, while performing no encryption or prompting to input correct confirmation information if the answer is negative.

2. The method according to claim 1, wherein said output device outputs in the form of text, sound and/or image.

3. The method according to claim 1, wherein said step of converting by the encryption device the data to be encrypted in the memory into a format required by the output device comprises converting a part or all of the entire data to be encryption into a format required by the output device.

4. The method according to claim 1, further comprising the step of receiving, by said encryption device, a Personal Identification Number (PIN) from the input/output interface, determining whether the received PIN is consistent with the pre-stored PIN, executing the step a if they are consistent with each other, otherwise performing no encryption or prompting to input correct PIN.

5. The method according to claim 1 or 4, wherein said confirmation information is a level signal, and said step of determining whether the confirmation information is legal comprises determining whether the received level signal is the preset high level or low level.

6. The method according to claim 1 or 4, wherein said confirmation information is a character string, and said step of determining whether the confirmation information is legal comprises determining whether the received character string is identical to the pre-stored character string.

7. The method according to claim 1, wherein whether said confirmation information is legal is indicated by the status of a flag bit preset for representing whether said confirmation information is legal, and whether said encryption is completed is indicated by the status of a flag bit for representing whether said encryption is completed.

8. An encryption device, comprising:

an input/output interface for receiving data to be encrypted from a platform and transmitting the data to an execution unit, or receiving the encrypted data from the execution unit and transmitting the data to the platform;

an execution unit receiving and storing the data to be encrypted from the input/output interface, or converting the stored data to be encrypted into a format required by an output device and transmitting the converted data to the output device via a management interface, or receiving confirmation information from the management interface and encrypting the stored data to be encrypted after verifying the legality of the confirmation information;

a management interface for receiving confirmation information from the outside and transmitting the received confirmation information to the execution unit; and

an output device for receiving the data to be encrypted from the execution unit via the management interface and outputting the data.

9. The device according to claim 8, wherein said output device is a display, a printer or a speaker or any combination of them.

10. The device according to claim 9, wherein said display and/or speaker and/or printer contain a RAM unit.

11. The device according to claim 8, wherein said input/output interface comprises serial port, parallel port, 1394 interface, USB interface, SIM card interface, iso14443 interface, iso7816 interface, infrared interface, Bluetooth interface, Zigbee interface, WLAN interface, radio frequency RF interface or wireless channel interface of a wireless signaling mechanism.

12. The device according to claim 8, wherein said management unit comprises serial port, parallel port, universal input/output signal interface or wireless interface.