Electronic terminal and short message encrypting and decrypting method thereof

Abstract

The invention relates to an electronic terminal and a short message encrypting and decrypting method thereof, and is applied to a network system comprising a transmitting terminal and a receiving terminal. The short message encrypting method comprises the following steps: converting inputted text information to bitmap information, generating an embedded secrete key by utilizing equipment information or preset protocol information of the receiving terminal, embedding the bitmap information into a preset or randomly-selected picture according to a watermark embedding algorithm, and receiving the picture with the bitmap information through the receiving terminal. The short message decrypting method comprises the following steps: generating an extracting secrete key according to the equipment information or preset protocol information of the receiving terminal, extracting the bitmap information from the picture by utilizing a watermark extracting algorithm, and converting the bitmap information into corresponding text information to be displayed. The electronic terminal and the short message encrypting and decrypting method are high in security, when the information is intercepted by a third party or the electronic terminal is lost, the security of the information can be guaranteed.

Description

technical field [0001] The invention relates to the field of information security transmission, in particular to an electronic terminal and a short message encryption and decryption method thereof. Background technique [0002] SMS is the basic function of mobile phones, and the number of short messages sent to mobile phones worldwide has reached about 1 billion per day, and it is in a stage of continuous growth. With the wide application of short messages in the business process and the increasing concern of users for privacy, the security of short messages will be paid more and more attention. Many mobile phone manufacturers are already solving this problem, such as setting SMS reading passwords or hiding SMS functions for mobile phones, but these methods only treat the symptoms but not the root cause. Because the current text messages on mobile phones are sent in plain text, this is a great risk of leaking text messages with confidential information, because mobile phone...

AI Technical Summary

Problems solved by technology

For example, the Chinese patent application "A Method and Device for Encrypting Short Messages" with the application number of 201210336289.5 sends the encrypted short message and the encryption key to the target electronic terminal, and adopts double encryption to ensure that the short message is transmitted during transmission. The disadvantage is that the encrypted text message and the encryption key may be intercepted at the same time, and when the electronic terminal is lost, the third party can still obtain the information stored in the electronic terminal

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