基于三次方程的LSB隐藏信息的盲检测  

Blind Detection of LSB Steganography Based on a Cubic Equation

作　　者：陆佩忠[1] 罗向阳[2] 汤庆阳[1] 沈利[2] 邹艳[1] 

机构地区：[1]复旦大学计算机科学与工程系,上海200433 [2]解放军信息工程大学信息工程学院,郑州450002

出　　处：《电子与信息学报》2005年第3期392-396,共5页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(10171017)国家自然科学基金重大研究计划(90204013)上海市科技发展基金(035115019)教育部全国优秀博士学何论文作者专项基金资助课题

摘　　要：该文提出基于最小平方策略以及导出的三次方程的检测最低有效位(LSB)隐藏信息容量的新算法。与Dumitrescu等人(2003)提出的方法比较,新算法具有下列优点:检测的前提条件更宽松、虚警概率更低(由13％降至4％左右),估计的精度提高约9％,而且检测速度更快。该文还给出了具体的检测步骤和相关的理论推导。This paper presents a fast algorithm to detect the Least Significant Bit (LSB) steganography. The new approach is inspired by the work of Dumitrescu et al.(2003) who detected LSB steganography via sample pair analysis. The new algorithm combines with the statistical measures developed by Dumitrescu and a new least square estimation. A simple cubic equation is deduced to describe the length of hidden messages with relatively high robust and precision. Moreover, compared with Dumitrescu's algorithm, the novel method has much lower false alarm rate of 5% than that of 13.79%, and the estimating precision is about 9% higher if the embedding ratio is less than 10%, and the speed is also about 15 % faster. Some theoretical derivations are also included.

关 键 词：信息隐藏 LSB 抽样对 最小二乘法 盲估计 

分 类 号：TP309[自动化与计算机技术—计算机系统结构] TN911.23[自动化与计算机技术—计算机科学与技术]