一種動態(tài)更新失真代價的自適應k隱寫算法

湯光明; 邊媛; 韋大偉; 高瞻瞻; 朱垚臻

doi:10.11999/JEIT160254

一種動態(tài)更新失真代價的自適應k隱寫算法

doi: 10.11999/JEIT160254 cstr: 32379.14.JEIT160254

基金項目:

國家自然科學基金(61303074)，信息保障技術(shù)重點實驗室開放基金(KJ-14106)

計量
- 文章訪問數(shù): 1543
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- 被引次數(shù): 0
出版歷程
- 收稿日期: 2016-03-17
- 修回日期: 2016-08-17
- 刊出日期: 2017-01-19

Adaptive k Steganography Based on Dynamic Updating Distortion Cost

Funds:

The National Natural Science Foundation of China (61303074), The Foundation of Science and Technology on Information Assurance Laboratory (KJ-14106)

摘要

摘要: 基于失真函數(shù)的自適應隱寫技術(shù)在嵌入過程中，忽略了嵌入操作相互間的影響，隱寫策略無法隨載體統(tǒng)計特性的改變自適應地調(diào)節(jié)?？紤]嵌入操作的交互影響，該文提出一種基于動態(tài)更新失真代價的k隱寫算法。首先分析了中心像素與其鄰域的相關(guān)性，理論證明了在4-鄰域修改情況下中心像素的最優(yōu)修改方式，進而提出了失真代價更新策略MDS(Modification Degree Strategy)；并結(jié)合該策略設計實現(xiàn)了一種自適應k隱寫算法。實驗表明，五元修改方式下算法UNIWARD-MDS(Pentary Version)在高嵌入率下(0.5~1.0 bpp)的抗SRM檢測性優(yōu)于S-UNIWARD(Pentary Version)，同時在抵抗maxSRMd2檢測時不同嵌入率下均優(yōu)于S-UNIWARD(Pentary Version)；三元修改方式下算法HILL-MDS和UNIWARD-MDS(Ternary Version)抗檢測性能優(yōu)于對應的自適應隱寫算法HILL和S-UNIWARD(Ternary Version)。
- 信息安全 /
- 隱寫 /
- 自適應隱寫 /
- 動態(tài)更新失真代價
Abstract: Adaptive steganography ignores the interactive impact introduced by the embedding operation during the embedding operation. Considering the cross impact of the embedding operation, an adaptive k steganography is put forward based on the dynamic distortion cost updating strategy Modification Degree Strategy (MDS). First, the analysis is conducted to prove the optimizing modification of the central pixel under the condition of the neighborhoods modifications. Then the MDS of updating the distortion cost is presented to adjust the distortion cost according to the modification of neighborhood. Finally, the steganography scheme is proposed using the MDS. The experimental result illustrates that the UNIWARD-MDS (Pentary Version) has a better performance than S-UNIWARD (Pentary Version) at the embedding rate 0.5~1.0 bpp when resisting the steganalysis SRM. Meanwhile the UNIWARD-MDS (Pentary Version) is better than the S-UNIWARD (Pentary Version) at the embedding rate 0.05~1.0 bpp when resisting the maxSRMd2 detection. The HILL-MDS and UNIWARD-MDS (Ternary Version) perform better than the corresponding schemes HILL and S-UNIWARD (Ternary Version).
- Information security /
- Steganography /
- Adaptive steganography /
- Dynamic updating distortion cost

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參考文獻(17)

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