Scientific American: Algorithm Virtually Unfolds a Historical Letter without Uns
ealing It.
[1]https://www.scientificamerican.com/article/algorithm-virtually-unfolds-a-hist
orical-letter-without-unsealing-it/

References

   1. https://www.scientificamerican.com/article/algorithm-virtually-unfolds-a-historical-letter-without-unsealing-it/