<ul><li>The purpose of Blockstream Jade's blind oracle is to not have the encryption key stored in Jade, preventing physical key extraction. It serves as a secure element in an external server to maintain full open-source integrity.</li><li>The secret key to unlock the wallet is obtained through an Elliptic Curve Diffie-Hellman (ECDH) key exchange, which requires correctly setting the PIN.</li><li>The security of the PIN itself is a valid concern, as it is not stored in a secure element.</li><li>If an attacker gains access to the PIN, they could potentially perform the ECDH themselves and obtain the secret key, undermining the overall security.</li></ul>

How is Blockstream Jade's PIN secure?

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