New ask Hacker News story: Ask HN: Encryption algorithm with *multiple* decryption keys?

Ask HN: Encryption algorithm with *multiple* decryption keys?
3 by rrnechmech | 4 comments on Hacker News.
Sorry for what might be a dumb question but, does there exist an encryption algo that allows something to be encrypted in such a way that any number of n keys or passwords or the like might decrypt? (Obviously to obtain the same cleartext)

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