Provably Secure Public-Key Steganography Based on Elliptic Curve Cryptography

计算机科学 椭圆曲线密码 公钥密码术 密码学 计算机安全 钥匙(锁) 隐写术 基于身份的加密 金融密码学 椭圆曲线 理论计算机科学 加密 密钥分发 数学 嵌入 人工智能 数学分析
作者
Xin Zhang,Kejiang Chen,Jinyang Ding,Yuqi Yang,Weiming Zhang,Nenghai Yu
出处
期刊:IEEE Transactions on Information Forensics and Security [Institute of Electrical and Electronics Engineers]
卷期号:19: 3148-3163 被引量:3
标识
DOI:10.1109/tifs.2024.3361219
摘要

Steganography is the technique of hiding secret messages within seemingly harmless covers to elude examination by censors. Despite having been proposed several decades ago, provably secure steganography has not gained popularity among researchers due to its rigorous data requirements. Recent advancements in generative models have enabled these researchers to provide explicit data distributions, which has contributed to the development of provably secure steganography methods. However, these methods depend on the assumption of a preshared key. In practical settings, these methods face various challenges, including key agreement, key updating, and user expansion. Although public-key steganography provides a viable solution, existing public-key steganography approaches are burdened with inefficiency and complex implementation in practical scenarios. In this paper, we proposes a practical public-key steganography method based on elliptic curve cryptography and a generative model. This method is the first comprehensive and practical approach to public-key steganography and steganographic key exchange. Additionally, we provide a specific instance to illustrate the proposed method. The security of the proposed construction is also proven based on computational complexity theory. Further experiments have demonstrated the security and efficiency of the proposed method.
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