I contributed to a 2013 paper that attempted to address some of BTC's
   then known shortcomings, including the blockchain length but the our
   suggestions got no attention by the core developers.

   On Wed, Nov 18, 2020, 8:27 PM grarpamp <[1]grarpamp@gmail.com> wrote:

     On 11/18/20, jim bell <[2]jdb10987@yahoo.com> wrote:
     > Decrypt: Inside the Competition That Will Save Bitcoin From
     Quantum Computers.
     >
     [3]https://decrypt.co/48107/inside-the-competition-that-will-save-bi
     tcoin-from-quantum-computers
     [4]https://www.post-quantum.com/
     It's McEliece, them combined with DJB's group, see NIST
     competition...
     [5]https://csrc.nist.gov/News/2020/pqc-third-round-candidate-announc
     ement
     People are not very happy with legacy cryptocurrencies, they will
     fall to new cryptocurrencies unless they address the following
     asap...
     - privacy
     - storage that grows only as function of UTXO count, not of TX count
     - native tx rate
     - pqc
     - asic hard, cpu gpu easy
     Users and the crypto world should subject a company, that believes
     PQC should be pulled off the shelves, to the most severe levels
     of inquisition, inspection, vigilance, and opensource audits...
     [6]https://www.ibtimes.co.uk/pqchat-worlds-most-secure-messaging-app
     -unbreakable-by-quantum-computing-1449591
     [7]https://hacker10.com/mobile-phone/encrypted-mobile-phone-chat-vid
     eo-and-calls-with-pqchat/
     [8]https://www.telegraph.co.uk/technology/news/10845918/WhatsApp-riv
     al-PQchat-claims-to-be-worlds-most-secure-messaging-app.html
     [9]https://www.silicon.co.uk/workspace/pqchat-messaging-encryption-q
     uantum-computing-146089
     [10]https://web.archive.org/save/https://www.quora.com/Is-PQchat-as-
     secure-as-the-developer-claims
     [11]https://android-full-encryption.blogspot.com/2020/03/should-you-
     switch-from-whatsapp-to_37.html
     "We're not asking the right question [when we talk about
     encryption],"
     says Andersen Cheng, the chief executive of cryptography company
     Post
     Quantum. "In the intelligence world sometimes metadata is more
     important." Cheng said he developed a messaging app but pulled it
     when
     it appeared on an Islamic State recommended apps list.
     [12]https://decrypt.co/48107/inside-the-competition-that-will-save-b
     itcoin-from-quantum-computers
     Post-Quantum’s ambitions ... The protocol ... was the backbone of
     its
     short-lived quantum-secure chat app; the company removed it from the
     Google Play store after ISIS started using it to coordinate attacks.
     “Too much hassle,” said Cheng. “Don’t get me wrong—we still want to
     make some money out of it,” said Cheng
     [13]https://www.youtube.com/watch?v=_nqemxK3Bsc PQChat from SRD
     Wireless,
     PQ Solutions, and Post-Quantum Andersen Cheng

References

   1. mailto:grarpamp@gmail.com
   2. mailto:jdb10987@yahoo.com
   3. https://decrypt.co/48107/inside-the-competition-that-will-save-bitcoin-from-quantum-computers
   4. https://www.post-quantum.com/
   5. https://csrc.nist.gov/News/2020/pqc-third-round-candidate-announcement
   6. https://www.ibtimes.co.uk/pqchat-worlds-most-secure-messaging-app-unbreakable-by-quantum-computing-1449591
   7. https://hacker10.com/mobile-phone/encrypted-mobile-phone-chat-video-and-calls-with-pqchat/
   8. https://www.telegraph.co.uk/technology/news/10845918/WhatsApp-rival-PQchat-claims-to-be-worlds-most-secure-messaging-app.html
   9. https://www.silicon.co.uk/workspace/pqchat-messaging-encryption-quantum-computing-146089
  10. https://web.archive.org/save/https://www.quora.com/Is-PQchat-as-secure-as-the-developer-claims
  11. https://android-full-encryption.blogspot.com/2020/03/should-you-switch-from-whatsapp-to_37.html
  12. https://decrypt.co/48107/inside-the-competition-that-will-save-bitcoin-from-quantum-computersPost-Quantum
  13. https://www.youtube.com/watch?v=_nqemxK3Bsc