Lossless Data Hiding in NTRU Cryptosystem by Polynomial Encoding and Modulation
Hao-Tian Wu,
Yiu-Ming Cheung,
Zhihong Tian
et al.
Abstract:Lossless data hiding in ciphertexts (LDH-CT) is to perform data embedding without changing their plaintexts, which can be used to transmit extra data in the applications of homomorphic encryption at little cost. In this paper, two LDH-CT algorithms named Polynomial Encoding (PE) and Polynomial Modulation (PM) are proposed for the "N-th Degree Truncated Polynomial Ring Unit" (NTRU) scheme, respectively. In the PE algorithm, a polynomial is encoded according to a string of bit values and further used to encrypt … Show more
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