设计并实现了一种基于二维码的加密信息传递系统，用于将普通文本信息高效、安全地从内网传输至外网。传统的内外网物理隔离的方法在保证数据安全的同时也严重限制了内外网之间的数据交流，因此不能满足需求。摆渡机等中继方式在从内向外传输纯文本信息时，方法的程序繁琐且效率低。为了解决这些问题，利用二维码信息密度高的优势，在信息传递系统的信息生成端将内网的普通文本加密后生成二维码发布，再在信息读取端扫描、解密并逆转换二维码后显示信息。实验结果表明，该基于二维码的加密信息传递系统在保证安全的前提下完成了大容量文字信息的单向传输工作，具有较高的实用性、易开发性、可移植性。%An encryption information transmission system based on two-dimensional code is designed and implemented,in order to trans-fer plain text messages from internal devices to external devices. Although physical isolation measure can guarantee data security,it seri-ously limits data exchanges between intranet and extranet which can’ t meet the demands. Transition machine etc. can transfer plain text from the inside,but the procedure is tedious when transferring plain text message. For solving these problems,taking advantage of the high information density of two-dimensional code,in the message generation end the plain text is encrypted and then published as two-dimen-sional code pictures,and in the message reading end the message is resolved after the reader scanning the pictures. The experiment results show that the system can complete the encrypted information transmission in a safe way,and has good performance and transportability.
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