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Free public beta until December 4, 2026: every course is open, no card needed. After that, the first chapter of each course stays free and full access is a one-time $39 ($19 for up to 100 founding members chosen for helpful feedback). Your progress is kept. How the beta works

digital signature

Made with a private key, checked by anyone with the public key.

A digital signature (Ed25519, ECDSA P-256) gives integrity, authenticity and non-repudiation verifiable by anyone with the signer's public key; it hides nothing.

Examples

  • A bench node signs with its Ed25519 or ECDSA P-256 private key, and anyone with its public key can check the signature.

  • A firmware image is hashed and the hash signed, so any device holding the public key can verify the update came from you.

See also

hash function non-repudiation message authentication code
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