计算机科学
加密
密码学
安全多方计算
秘密分享
密码原语
同态秘密共享
密钥生成
图像(数学)
嵌入
数据共享
公钥密码术
共享秘密
同态加密
计算机安全
理论计算机科学
钥匙(锁)
密码协议
人工智能
医学
病理
替代医学
作者
Yu‐Chi Chen,Tsung-Hsuan Hung,Sung-Hsien Hsieh,Chih-Wei Shiu
标识
DOI:10.1109/tifs.2019.2914557
摘要
Reversible data hiding in encrypted images (RDHEI) has been introduced for preserving image privacy and data embedding. RDHEI usually involves three parties, namely, the image provider, data hider, and receiver. On the security with key setting, there are three categories: share independent secret keys (SIK), shared one key (SOK), and share no secret keys (SNK). In SIK, the image provider and data hider must respectively and independently share secret keys with the receiver, whereas in SNK, no secret key is shared. However, the literature works proposed SNK-type schemes by using homomorphic encryption (with exorbitant computation cost). In this paper, we address the SOK setting, where only the image provider shares a secret key with the receiver, and the data hider can embed a secret message without any knowledge of this key. To realize our SOK scheme in a simple manner, we propose a new technique by using multi-secret sharing as the underlying encryption, which indeed induces a blow-up issue of the key size. For preserving the efficiency of the key size, we apply a compression by using lightweight cryptographic algorithms. Then, we demonstrate our SOK scheme based on the proposed techniques, and show effectiveness, efficiency, and security by experiments and analysis.
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