Method, device, and system for encrypting and decrypting image

摘要

The present invention relates to the field of computers, and disclosed are a method, device, and system for encrypting and decrypting an image. The method for encrypting an image includes: encrypting a preset size of header data of a to-be-encrypted image, and obtaining an encrypted data corresponding to the header data; determining a storage location for saving the encrypted data, saving the encrypted data in the storage location, and acquiring an offset for saving the encrypted data; and placing the encryption identifier and the offset in a storage area of the preset size of the to-be-encrypted image, so as to encrypt the to-be-encrypted image. The system includes: a device for encrypting an image and a device for decrypting an image. The present invention is capable of improving the speed and efficiency of encrypting and decrypting an image.

主权项

1. A method for encrypting an image performed at a handheld computer having a processor and memory for storing one or more programs to be executed by the processor, comprising:
obtaining a size of header data of an image file; encrypting the header data; in the process of encrypting the header data, obtaining encrypted data corresponding to the header data; dividing the encrypted data into a first part and a second part based on a size of the header data and a size of the encrypted data; and obtaining an encrypted image file for the image file based on the encrypted data, comprising:
replacing the header data in the image file with the first part of the encrypted data, a location information and an encryption identifier; andplacing the second part of the encrypted data to the end of the image file.