Top 10 Unbreakable Ciphers and Codes

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Text version: https://www.toptenz.net/top-10-unbreakable-ciphers-codes.php

Coming up:

10. Dorabella Cipher
9. D’Agapeyeff Cipher
8. Indus Script
7. Chinese Gold Bar Ciphers
6. Zodiac Killer
5. Linear A
4. Proto-Elamite
3. Taman Shud
2. McCormick Cipher
1. Bacon Cipher

Source/Further reading:

http://www.ciphermysteries.com/the-dorabella-cipher
http://www.ciphermysteries.com/2013/12/23/dagapeyeff-cipher
http://elonka.com/UnsolvedCodes.html
http://books.google.com/books?id=G4gCs-RmVZwC&pg=PA46&lpg=PA46&dq=General+Wang+unsolved+gold+bars&source=bl&ots=vrfYkpCHEz&sig=gwWoVvcHk5qecMsXwuLVmZoYKZU&hl=en&sa=X&ei=XU9_U-HGOtelyATduYDYDg&ved=0CHsQ6AEwBQ#v=onepage&q=General%20Wang%20unsolved%20gold%20bars&f=false
http://www.zodiologists.com/
https://www.cam.ac.uk/research/news/cracking-the-code-the-decipherment-of-linear-b-60-years-on
http://www.ancientscripts.com/elamite.html
http://www.ciphermysteries.com/2009/08/08/the-tamam-shud-cipher-mystery
https://www.fbi.gov/news/stories/2011/march/cryptanalysis_032911/cryptanalysis_032911
https://www.jstor.org/discover/10.2307/751135?uid=3739256&uid=2129&uid=2&uid=70&uid=4&sid=21103794245461

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