A Lossless Data Hiding Scheme in Public Key Encrypted Domain Based on Homomorphic Key-Switching

Author(s):  
Yan Ke ◽  
Minqing Zhang ◽  
Tingting Su ◽  
Jia Liu
2021 ◽  
Vol 13 (4) ◽  
pp. 71-89
Author(s):  
Ting-ting Su ◽  
Yan Ke ◽  
Yi Ding ◽  
Jia Liu

This paper proposes a lossless data hiding scheme in learning with errors (LWE)-encrypted domain based on key-switching technique. Lossless data hiding and extraction could be realized by a third party without knowing the private key for decryption. Key-switching-based least-significant-bit (KSLSB) data hiding method has been designed during the lossless data hiding process. The owner of the plaintext first encrypts the plaintext by using LWE encryption and uploads ciphertext to a (trusted or untrusted) third server. Then the server performs KSLSB to obtain a marked ciphertext. To enable the third party to manage ciphertext flexibly and keep the plaintext secret, the embedded data can be extracted from the marked ciphertext without using the private key of LWE encryption in the proposed scheme. Experimental results demonstrate that data hiding would not compromise the security of LWE encryption, and the embedding rate is 1 bit per bit of plaintext without introducing any loss into the directly decrypted result.


2013 ◽  
Vol 86 (8) ◽  
pp. 2166-2173 ◽  
Author(s):  
Yongjian Hu ◽  
Kan Wang ◽  
Zhe-Ming Lu

2013 ◽  
Vol 86 (7) ◽  
pp. 1965-1975 ◽  
Author(s):  
Kan Wang ◽  
Zhe-Ming Lu ◽  
Yong-Jian Hu

2004 ◽  
pp. 531-547 ◽  
Author(s):  
Yun Q. Shi ◽  
Guorong Xuan ◽  
Wei Su

2019 ◽  
Vol 28 (05) ◽  
pp. 1 ◽  
Author(s):  
Mingming Zhang ◽  
Quan Zhou ◽  
Yanlang Hu

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