[Verse 1] Download a package from the web today How do you know it's safe to run? Could be malware dressed in friendly code The battle for trust has just begun Cryptographic signatures hold the key Mathematics guards what we believe Every hash becomes a fingerprint Digital proof we can retrieve [Chorus] Hash plus signature seals our fate Verify before it's far too late Private key signs, public key checks Certificate chains protect what's next Hash plus signature seals our fate Authentication we can't debate [Verse 2] Alice writes code and wants to share She runs it through a hashing spell SHA-256 creates a digest A unique summary she can tell Now with her private key in hand She encrypts that precious hash Digital signature is born complete Her identity becomes the cash [Chorus] Hash plus signature seals our fate Verify before it's far too late Private key signs, public key checks Certificate chains protect what's next Hash plus signature seals our fate Authentication we can't debate [Bridge] Certificate authorities build the trust Root certificates anchor all we must Public key infrastructure spans the globe Revocation lists expose each rogue Package managers check every sum Before they let installations run [Verse 3] Bob receives Alice's signed creation First he computes the hash himself Then decrypts her signature payload Comparing treasures on the shelf If both digests perfectly align And certificate validates her name The software passed its sacred test Authenticity stakes its claim [Chorus] Hash plus signature seals our fate Verify before it's far too late Private key signs, public key checks Certificate chains protect what's next Hash plus signature seals our fate Authentication we can't debate [Outro] In supply chains where attackers lurk Cryptographic proofs do all the work Hash plus signature seals our fate Verify before it's far too late
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