Information-decoding method and terminal

Abstract

The invention discloses an information-decoding method and a terminal. The aim of the invention is to use an encryption technique to achieve the encrypted communication of information. The decoding process comprises the following steps: a receiving end receives a secrecy-loaded picture, and obtains an embedded enciphered message, specifically to obtain a length indicator of secrecy-loaded information and read the enciphered message according to the length indicator in turn; the receiving end calls a decryption module and obtains a decryption key pair to decrypt the enciphered message and display the enciphered message.

Description

technical field [0001] The invention is applied in the fields of mobile communication, information security and the like, and in particular relates to an information decoding method and a terminal. Background technique [0002] Through investigation, at present, there is no mobile phone on the market that directly encrypts the transmission and storage of text messages, and no mobile phone product uses a hardware encryption chip for data protection. At present, there are some software applications in the software market that can encrypt transmission or storage of some text messages. . The usual method of transmission is: set a security password on the local machine, and tell the receiver the password at the same time; when sending a text message, use this password as a key to encrypt the text message; decrypt. The usual storage method is to fix a certain key, specify a certain text message to encrypt, and then replace and save the ciphertext in the system, and the ciphertex...

AI Technical Summary

Problems solved by technology

There are at least the following deficiencies in this scheme or technology: (1) Usability is not strong

The current application basically only implements a part, without comprehensive consideration from the perspective of the system. For example, it either only realizes the encryption of the transmission part, or only realizes the encryption of the local SMS, and does not consider under what circumstances it will be encrypted and under what circumstances it will not be used. Encryption, the security of SMS has not been considered as a whole, from the key generation of SMS, to encrypted transmission, and then to local storage.

Therefore, if you want to build a complete SMS security system by yourself, you need the cooperation of multiple software, and it is difficult to cooperate with the current application software.

(2) Poor usability

If each text message is negotiated once, although the password can be obtained, the communication cost will increase. For example, one text message is originally sent, but at least three text messages will be generated under the condition of ensuring safety, and the communication cost has increased by 2 times.

And each text message can only be saved in plain text, otherwise the corresponding password cannot be unlocked if it is lost

For applications that store encrypted text messages, they often see ciphertext, which is very painful for people who want to view the content of text messages. They cannot tell which text message it is at a glance, and they need to decrypt each text message to be sure.

(3) Low security

Security considerations have not been taken at every stage from SMS key generation, to encrypted transmission, to local storage, but only a part of it has been implemented. In addition, the key settings of existing applications are basically weak, and the security very poor

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