基于LWE的密文域可逆信息隐藏
发布时间：2018-10-29 09:15
【摘要】：该文提出了一种基于LWE(Learning With Errors)算法的密文域可逆隐写方案,利用LWE公钥密码算法对数据加密,用户在密文中嵌入隐藏信息,对于嵌入信息后的密文,用户使用隐写密钥可以有效提取隐藏信息,使用解密密钥可以无差错恢复出加密前数据实现了提取过程与解密过程的可分离。通过推导方案在解密与提取信息过程中出错的概率,得到直接影响方案正确性的参数为所选噪声的标准差,实验获得并验证了标准差的合理取值区间;通过推导嵌入后密文的分布函数,分析密文统计特征的变化情况,论证了嵌入密文的隐藏信息的不可感知性。该方案是在密文域进行的可逆隐写,与原始载体无关,适用于文本、图片、音频等各类载体。实验仿真结果表明该方案不仅能够保证可逆隐写的可靠性与安全性,而且1 bit明文在密文域最大可负载1 bit隐藏信息。
[Abstract]:In this paper, a reversible steganography scheme in ciphertext domain based on LWE (Learning With Errors) algorithm is proposed. The data is encrypted by LWE public key cryptography algorithm. Users embed hidden information in ciphertext. The steganography key can be used to extract the hidden information effectively, and the decryption key can be used to recover the pre-encryption data without error, which can separate the extraction process from the decryption process. By deducing the probability of error in the process of decrypting and extracting information, the parameters directly affecting the correctness of the scheme are the standard deviation of the selected noise. The reasonable range of the standard deviation is obtained and verified by the experiment. By deducing the distribution function of embedded ciphertext and analyzing the change of statistical features of ciphertext, the inperceptibility of hidden information of embedded ciphertext is proved. The scheme is reversible steganography in the ciphertext field, independent of the original carrier, suitable for text, picture, audio and other kinds of carriers. The experimental results show that the proposed scheme can not only guarantee the reliability and security of reversible steganography, but also can load 1 bit hidden information in the ciphertext domain.
【作者单位】： 武警工程大学电子技术系网络与信息安全武警部队重点实验室;
【基金】：国家自然科学基金(61379152;61272492)~~
【分类号】：TN918.4
，
本文编号：2297274
[Abstract]:In this paper, a reversible steganography scheme in ciphertext domain based on LWE (Learning With Errors) algorithm is proposed. The data is encrypted by LWE public key cryptography algorithm. Users embed hidden information in ciphertext. The steganography key can be used to extract the hidden information effectively, and the decryption key can be used to recover the pre-encryption data without error, which can separate the extraction process from the decryption process. By deducing the probability of error in the process of decrypting and extracting information, the parameters directly affecting the correctness of the scheme are the standard deviation of the selected noise. The reasonable range of the standard deviation is obtained and verified by the experiment. By deducing the distribution function of embedded ciphertext and analyzing the change of statistical features of ciphertext, the inperceptibility of hidden information of embedded ciphertext is proved. The scheme is reversible steganography in the ciphertext field, independent of the original carrier, suitable for text, picture, audio and other kinds of carriers. The experimental results show that the proposed scheme can not only guarantee the reliability and security of reversible steganography, but also can load 1 bit hidden information in the ciphertext domain.
【作者单位】： 武警工程大学电子技术系网络与信息安全武警部队重点实验室;
【基金】：国家自然科学基金(61379152;61272492)~~
【分类号】：TN918.4
，
本文编号：2297274
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