基于PDF417条码的信息隐藏算法

Information Hiding Algorithm Based on PDF417 Barcode

针对现有隐藏方法存在嵌入信息量少、鲁棒性差、安全性低的不足,提出一种改进的基于PDF417条码的信息隐藏算法。该算法对隐藏信息进行扩频和映射处理,根据PDF417条码自身结构特点,通过微调条码中的条和空将信息隐藏其中。实验结果表明,该算法隐藏的信息在经受打印扫描和污损攻击后,仍具有较高提取率。

Aiming at shortages of little capacity of embedded information,bad robustness and low secrecy for existing hiding algorithm,this paper proposes an improved information hiding algorithm based on PDF417 barcode.The algorithm goes on spread spectrum and map hiding information,according to self-structure feature of PDF417,and then information is hidden into micro-barcode by modifying the configuration of bar and space.Experimental results show that this algorithm had better extraction ratio to attack of printing scan and damage.