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A threshold secret sharing scheme permits a secret to be shared among participants in such a way that only qualified subsets of participants can recover the secret. Threshold secret sharing is useful in management of cryptographic keys. Based on Birkhoff interpolation, Tassa has proposed an ideal hierarchical threshold secret sharing scheme. Then based on Sure interpolation and participants' identity,...
OCR systems for printed documents typically require large numbers of font styles and character models to work well. When given an unseen font, performance degrades even in the absence of noise. In this paper, we perform OCR in an unsupervised fashion without using any character models by using a cryptogram decoding algorithm. We present results on real and artificial OCR data.
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