// blog · category
Research
2 posts in this category.
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Why a hardware signer for Nostr?
Where the private key actually lives is the only honest answer to "is this account safe?". Hardware signers move that answer to a place where review and approval are explicit.
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approval_digest: binding what you reviewed to what you sign
A hardware signer is only as honest as the link between the screen you read and the bytes the device puts a signature on. approval_digest is the contract that makes that link non-forgeable.