Probabilistic Methods for a Japanese Syllable Cipher
- Cite this paper as:
- Ravi S., Knight K. (2009) Probabilistic Methods for a Japanese Syllable Cipher. In: Li W., Mollá-Aliod D. (eds) Computer Processing of Oriental Languages. Language Technology for the Knowledge-based Economy. ICCPOL 2009. Lecture Notes in Computer Science, vol 5459. Springer, Berlin, Heidelberg
This paper attacks a Japanese syllable-substitution cipher. We use a probabilistic, noisy-channel framework, exploiting various Japanese language models to drive the decipherment. We describe several innovations, including a new objective function for searching for the highest-scoring decipherment. We include empirical studies of the relevant phenomena, and we give improved decipherment accuracy rates.
KeywordsSubstitution cipher decipherment language modeling
Unable to display preview. Download preview PDF.