Data encryption and decryption method and device, and mobile terminal

An encryption and decryption, encryption and decryption module technology, applied in the field of data encryption, can solve the problem that the video cannot be played on mobile, loses the meaning of compression, and increases the size of the video.

Active Publication Date: 2014-01-22
SPREADTRUM COMM (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the limited computing power and storage capacity of mobile devices, it is necessary to consider the complexity of decryption when encrypting video, otherwise the encrypted video will not be able to be played on the mobile, or the encrypted video will increase in size a lot, and the data will be lost. meaning of compression

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  • Data encryption and decryption method and device, and mobile terminal
  • Data encryption and decryption method and device, and mobile terminal
  • Data encryption and decryption method and device, and mobile terminal

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Embodiment Construction

[0040] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

[0041] At the same time, it should be understood that, for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship.

[0042] The following description of at least one exemplary embodiment is merely illustrative in nature and in no way taken as limiting the invention, its application or uses.

[0043] Techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods and devices should be considered part of the Authoriz...

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Abstract

The invention discloses a data encryption and decryption method and device, and a mobile terminal, and relates to the field of encryption technologies. The method comprises: generating, according to an encryption key/decryption key, a key stream source; generating, according to the key stream source and based on the Boolean function and exclusive-or (XOR) operation, a key stream; and generating encryption/decryption data by performing XOR operation on the key stream and data to be encrypted or decrypted. The encryption and decryption method and device structure which are adopted in the invention are quite simple, the requirements for software and hardware are quite low, the method and device can be applied to a low-end apparatus with quite poor calculating capability, and the size of the encrypted data is not increased too much.

Description

technical field [0001] The invention relates to data encryption technology, in particular to a data encryption and decryption method, device and mobile terminal. Background technique [0002] In recent years, with the widespread use of handheld multimedia terminal devices such as mobile phones and MP4s, consumers are more and more fond of watching videos and other activities on these devices. Limited by the development of storage technology, the storage space of many multimedia terminal devices, especially the relatively low-end devices, is very limited, and consumers hope that more multimedia content can be stored in the device. In addition, low-end devices often have very limited computing power. On the other hand, with the rapid development of PCs, the videos on PCs tend to be in standard definition and high definition. The general resolution is above 480p (640x480), and can reach 720p (1280x720) or even higher. Therefore, there is a gap between the actual demand and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/18H04L9/06
Inventor 曲博罗小伟林福辉
Owner SPREADTRUM COMM (SHANGHAI) CO LTD
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