🔥 仮想通貨業界の自主規制と現状（前編）｜第二東京弁護士会

However its implementation causes high accuracy detection of steganalysis due to the high payload and the use of least significant bit replacement LSBR steganography. We consider robust hierarchical secret sharing scheme secure against computationally unbounded rushing adversary who are allowed to submit possibly forged shares after observing shares of the honest users in the reconstruction phase. The results of the evaluation show effectiveness of the proposal in terms of high payload and reduction of steganalysis detection, as well as accurate recovery of the secret. To the best of our knowledge, this is the first information theoretic construction of robust hierarchical secret sharing scheme secure against malicious adversary.

This particular type of generalization of threshold access structures occurs 個人間送金 匿名 real life 個人間送金 匿名. Moreover we present an evaluation of the bit replacement steganography methods showing the most reliable for our PSIS.

In addition we use a k, L, n -threshold ramp secret sharing scheme, which allows to reduce the amount of embedded data. Robust secret sharing schemes constitute an important class of basic building blocks for the multi-party computation. In this paper, we take the initiative to define robustness for hierarchical secret sharing. There are few constructions of secret sharing schemes realizing such access structures. The secret image can be reconstructed with k or more stego-images. To reduce the accuracy detection we explore the securely embedding data by using least significant bit matching LSBM and least significant bit matching revisited LSBM-R. To define robustness for secret sharing schemes that realize access structures more general than the threshold ones is not easy. Though there are several constructions for robust secret sharing schemes but all of them only consider threshold access structures.