Yes, some of them have been around for many years, though they are still not in widespread use. Some protocols have been upgraded to use them. Encryption protocols are not something you swap out lightly, it can take many years for relatively obvious flaws to be discovered.
Basically whenever we want to upgrade things to post quantum encryption, we can, we have some stable stuff that's seen real use for years.
Look into the NIST encryption algorithm competitions as a starting place.
21_21_21
npub1hc…ayrcy
2026-01-22 11:29:53 UTC
in reply to nevent1q…spj9
Author Public Key
npub1hce578d83hff5c594p2pysunkhw24k3z7lj5czkd2vafs04y6v8q9ayrcySeen on
wss://nostr.momPublished at
2026-01-22 11:29:53 UTCEvent JSON
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"pubkey": "be334f1da78dd29a6285a854124393b5dcaada22f7e54c0acd533a983ea4d30e",
"created_at": 1769081393,
"kind": 1,
"tags": [
[
"alt",
"A short note: Yes, some of them have been around for many years,..."
],
[
"e",
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"wss://relay.mostr.pub/",
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[
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"da365790bf863f88c720a28f5eb64636df6ab45e905e2f63a5147c7e1c278493",
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],
"content": "Yes, some of them have been around for many years, though they are still not in widespread use. Some protocols have been upgraded to use them. Encryption protocols are not something you swap out lightly, it can take many years for relatively obvious flaws to be discovered.\n\nBasically whenever we want to upgrade things to post quantum encryption, we can, we have some stable stuff that's seen real use for years.\n\nLook into the NIST encryption algorithm competitions as a starting place.",
"sig": "4fa95fc764e6c3afafa223f530709ebcabd9f7ba8043dd0c2c69b8ea9c8c3b4e8ef052bcfb585379d9c34cb3352f3fdc97dcb569d11b26cbbf022379baab090e"
}