The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5 NO_PUBKEY 3B4FE6ACC0B21F32
apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 3B4FE6ACC0B21F32 ...
原文：kali-apt update時報The following signatures couldn't be verified because the public key is not available: NO_PUBKEY ED444FF07D8D0BF6解決方案
說到GPG就必須先要說一下PGP Pretty Good Privacy ，它們都是OpenPGP標准的具體軟件實現。上世紀 年代初 Phil Zimmermann 開發了PGP，用以保護個人和商業機構數據的隱私，很快就受到了普遍的歡迎和采用。 但有一個問題，PGP是個商業軟件，據說價格還挺貴 我也沒買過， 來年前曾經用過一段時間破解版 。於是 GNU 組織依據 OpenPGP 標准開發了開源免費 ...
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