基于三次方程的LSB隱藏信息的盲檢測(cè)
Blind Detection of LSB Steganography Based on a Cubic Equation
-
摘要: 該文提出基于最小平方策略以及導(dǎo)出的三次方程的檢測(cè)最低有效位(LSB)隱藏信息容量的新算法。與Dumitrescu等人(2003)提出的方法比較,新算法具有下列優(yōu)點(diǎn):檢測(cè)的前提條件更寬松、虛警概率更低(由13％降至4％左右),估計(jì)的精度提高約9％,而且檢測(cè)速度更快。該文還給出了具體的檢測(cè)步驟和相關(guān)的理論推導(dǎo)。
-
關(guān)鍵詞:
- 信息隱藏; LSB; 抽樣對(duì); 最小二乘法; 盲估計(jì)
Abstract: 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 Dumitrescus 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. -
計(jì)量
- 文章訪問(wèn)數(shù): 2275
- HTML全文瀏覽量: 78
- PDF下載量: 627
- 被引次數(shù): 0
下載:
