Information embedding and extracting method based on Unicode coding

Abstract

The invention provides an information embedding and extracting method based on Unicode encoding, which comprises the following steps: (1.1) preprocessing high bytes and low bytes of text message characters after Unicode encoding, so that the numerical ranges of the high bytes and the low bytes of each character are centralized; (1.2) carrying out segmented encoding calculation on the preprocessedhigh bytes and low bytes to enable the encoded high bytes and low bytes to be concentrated at certain data bits; (1.3) using data bits which are not used in the encoded high bytes and low bytes for information embedding, wherein the information extraction method comprises the following steps: (2.1) extracting embedded information according to sections where high bytes and low bytes of a message containing the embedded information are located; (2.2) decoding the high byte and the low byte of the message containing the embedded information to obtain the high byte and the low byte of the messagewithout the coded information; and (2.3) performing inverse preprocessing on the high byte and the low byte of the message without the coded information, and recovering the high byte and the low byteof the original data.

Description

technical field

[0001] The invention relates to a method of data communication, in particular to a method for embedding and extracting information based on Unicode encoding, and belongs to the field of communication (such as data communication technology, etc.). Background technique

[0002] In the satellite communication system and navigation system, a text message in a certain format will be transmitted between the sender and the destination. The message is mainly composed of Chinese characters, various characters and various symbols. During the transmission of satellite data, sensitive information can be embedded in satellite data, and the satellite data and sensitive information can be transmitted cooperatively without increasing the transmission capacity.

[0003] Common text message information embedding and hiding methods mainly focus on the text font size, color, line spacing and other formats, and hide the embedded information through different text formats. Such a...

Images