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Encryption method and apparatus of fingerprint image data

A fingerprint image and encryption method technology, applied in encryption devices with shift registers/memory, secure communication devices, digital transmission systems, etc., can solve problems such as poor user experience, and achieve the effect of improving user experience and shortening encryption time.

Inactive Publication Date: 2017-02-22
FUJIAN LANDI COMML EQUIP CO LTD
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Problems solved by technology

[0003] To use fingerprint recognition for payment, you first need to collect the fingerprint data to the background, usually need to collect (and encrypt) multiple uncompressed fingerprint image data to the background, in order to ensure the security of the fingerprint image data, the fingerprint image data needs to be processed by the terminal Encryption, the encrypted data is sent to the background, and the encryption key is negotiated between the background and the terminal; the encryption algorithm usually uses the 3DES algorithm, and the data with a size of about 500,000 bytes is encrypted. If the standard 3DES algorithm is used for encryption , 1024 bytes to calculate 3DES, it takes about 20ms, and the total encryption time takes about 10s, which makes the user experience extremely poor

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  • Encryption method and apparatus of fingerprint image data
  • Encryption method and apparatus of fingerprint image data
  • Encryption method and apparatus of fingerprint image data

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Embodiment Construction

[0035] In order to explain in detail the technical content, structural features, achieved goals and effects of the technical solution, the following will be described in detail in conjunction with specific embodiments and accompanying drawings.

[0036] see figure 1 , is a flow chart of the fingerprint image data encryption method described in an embodiment of the present invention; the method includes the following steps:

[0037] S1. Perform binary conversion processing on the original fingerprint image data to obtain a digital sequence to be encrypted;

[0038] S2. Encrypt the 256 possible combinations of numbers to be encrypted using a preset key to obtain a password table;

[0039] S3. Group the digital sequence to be encrypted into 8-byte units, search the password table for the corresponding passwords of each group, and concatenate the passwords to obtain an encryption result.

[0040] Further, in the fingerprint image data encryption method, the "binarization process...

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Abstract

The invention provides an encryption method of fingerprint image data, for providing a novel scheme for performing rapid encryption on fingerprint image big data and a 3DES algorithm. The method comprises the following steps: obtaining a digital sequence to be encrypted by performing binary conversion processing on original fingerprint image data; obtaining a cipher table by encrypting 256 combinations which may be composed of digits to be encrypted by use of a preset secret key; and performing grouping on the digital sequence to be encrypted by taking eight bytes as a unit, searching the cipher table for a password corresponding to each group, and obtaining an encryption result by splicing the passwords. The invention also simultaneously provides an encryption apparatus of fingerprint image data, for realizing the method. According to the technical scheme, when a large volume of fingerprint image data is encrypted by use of 3DES, the encryption time can be greatly shortened, and user experience is improved.

Description

technical field [0001] The invention relates to the field of fingerprint identification and encryption, in particular to an encryption method and device for fingerprint image data. Background technique [0002] In the field of financial payment, in addition to using traditional passwords for financial business transactions, biometrics are increasingly being used in payment services, such as fingerprint recognition. Traditional passwords have hidden dangers that are easy to be stolen. In addition, entering passwords is time-consuming and the user experience is not good. Fingerprint identification is unique, and also has the advantages of being safer and more convenient. [0003] To use fingerprint recognition for payment, you first need to collect the fingerprint data to the background, usually need to collect (and encrypt) multiple uncompressed fingerprint image data to the background, in order to ensure the security of the fingerprint image data, the fingerprint image data...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/32H04L9/06
CPCH04L9/0625H04L9/3231H04L9/32Y02D30/50
Inventor 林晖
Owner FUJIAN LANDI COMML EQUIP CO LTD
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