PGP is replaceable with the Bitcoin Public Key Infrastructure...prove me wrong

Encrypted communication can be accomplished using Bitcoin Public Keys. Verifying the authenticity and integrity of files can be accomplished by having a designated Bitcoin Public Address to serve as your public identity for signing messages. By including the file name and file hash within a signed message from a particular identity, the risk of a compromised website is largely mitigated as any potential tampering of a message (or file within it) would be apparent to all as it would break the digital signature/fingerprint.

To be clear, I am not advocating for the use of actual public addresses (or public keys) that have ever been used in bitcoin transactions as there are many problems (privacy and other) with this which have been pointed out over the years. What am I missing?

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We Need a 21st-Century Works Progress Administration β€” During the Great Depression, the Works Progress Administration was a key New Deal agency that put millions of unemployed workers back to work on public infrastructure projects. We need a new WPA for the 21st century. jacobinmag.com/2020/07/wo…
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Everything Public Key Infrastructure (PKI) - The Missing Manual smallstep.com/blog/everyt…
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Everything Public Key Infrastructure (PKI) - The Missing Manual smallstep.com/blog/everyt…
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Public SSH keys can leak your private infrastructure rushter.com/blog/public-s…
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Public Key Infrastructure(PKI) youtu.be/LGEGd21WDjw
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We Need a 21st-Century Works Progress Administration β€” During the Great Depression, the Works Progress Administration was a key New Deal agency that put millions of unemployed workers back to work on public infrastructure projects. We need a new WPA for the 21st century. jacobinmag.com/2020/07/wo…
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What Public Key Infrastructure do you use?

We are cloud-only using Azure AD with Azure AD Domain Services deployed, so Active Directory Certificate Services doesn't seem like the right fit. Cloudfare’s CFSSL open source project is interesting too. I'm curious what others are using for internal PKI.

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America Is an Oligarchy. It Doesn’t Have to Be: Crumbling public infrastructure, millions live in poverty as tens of millions more struggle to afford the basics, workers in every sector are overworked and underpaid, thousands die from lack of health insurance, racism remains a key part of the law jacobinmag.com/2019/02/us…
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Show /r/crypto: LibGossamer - Public Key Infrastructure without Certificate Authorities (for Secure Code Delivery) - Docs Feedback Very Welcome! github.com/paragonie/libg…
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LibGossamer: Public Key Infrastructure without Certificate Authorities (for WordPress and Packagist) github.com/paragonie/libg…
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[SMT] Create a PKI (public key infrastructure) and have organizations/people signup for authenticated phonecalls

Phone scams (eg. IRS scam,Microsoft tech suppport scam etc.) and spam calls have gone from nuisance to a serious issue. A solution might be to create a PKI that your phone app validates against to check that this is indeed who they claim they are.

tl;dr: Essentially "certificates" that are used for online SSL transactions, but for phone calls.

This way I can block anyone who's not registered there (and not in my contacts)

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Public SSH keys can leak your private infrastructure rushter.com/blog/public-s…
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Introduction to Networking | Network Basics for Beginners - Public Key Infrastructure(PKI) youtu.be/LGEGd21WDjw
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Alexandria Ocasio-Cortez: Spending the day in Denmark after C40, enjoying this social democracy that treats healthcare & education as rights, zero-carbon as priority, & infrastructure as a key public good. Here’s to another year of fighting for our future.πŸ’œ twitter.com/aoc/status/11…
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Shitpay (Bitpay) adopted BIP70. BIP70 introduces the requirement on developers to support legacy public-key infrastructure dependencies with known track records of vulnerabilities Additionally AML/KYC surveillance and monitoring of on-chain transactions and more effective blacklists. blog.samouraiwallet.com/p…
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Public SSH keys can leak your private infrastructure rushter.com/blog/public-s…
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Alexandria Ocasio-Cortez: Thank you everyone for the birthday wishes!🎈 Spending the day in Denmark after C40, enjoying this social democracy that treats healthcare & education as rights, zero-carbon as priority, & infrastructure as a key public good. Here’s to another year of fighting ... twitter.com/AOC/status/11…
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πŸ“’ Partnership announcement! Teaming up with PKI Solutions to advance the development and awareness of Public Key Infrastructure. More partnership details >> remme.io/blog/remme-selec…
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Introduction to Networking | Network Basics for Beginners - Public Key Infrastructure(PKI) youtu.be/LGEGd21WDjw
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Remme Releases a Distributed Public Key Infrastructure medium.com/eosio/remme-re…
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