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From: R. Halevi
Subject: Digital verification of kashrut certification
Date: 10 Elul 5780
Agency Y would need to sign it
And to verify Agency Y's signature, you need Agency Y's key. Their public key, which anyone can use to check signatures.
Where does she get Agency Y's public key? How does she know the key she found is really Agency Y's key and not a forgery?
—Dov Halevi
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