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CV-QKD has drawn many attentions due to the potential to provide high secret key rate and low cost. Error reconciliation is the key module of post processing of a CV-QKD system. In this paper, an improved LDPC-based SEC error reconciliation scheme is proposed. Through the optimization of inner-level decoding and reduction of the iteration rounds of inter–level decoding, the reconciliation can be accelerated...
Error correction is a key step in quantum key distribution. Winnow is a popular error correction algorithm and has been widely used. In this paper, an adaptive improved Winnow algorithm is presented, the main improvements are the adaptive selection of block size and a new uniform random scrambling method. The experimental results show that the proposed algorithm performs better than the original Winnow...
Although image robust hashing has drawn many attentions as a promising image authentication technique, the tamper detection and localization of robust hash algorithm has not been explored thoroughly. The most important difficulty is the conflict that the hash value is supposed to be robust to common content-preserving manipulations (CPM), such as lossy compression, but sensitive to malicious tamper...
While watermarking algorithms have been developed for many types of digital content, little work has been done to develop watermarking algorithms for 2D or 3D CAD vector images. This paper presents three blind watermarking methods that can embed several bits binary data into a vector image without changing its appearance. Preliminary experiments were conducted, which compared performance of different...
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