What are Schnorr signatures used for?

Primarily blockchain tx signing—Bitcoin Taproot, efficient multisig, smaller sizes than ECDSA.

How was the PS3 hacked using ECDSA?

Sony reused nonces (same R) in firmware sigs; hackers solved linear equations for private key.

Is Schnorr better than ECDSA?

Yes—for aggregation, size, privacy; ECDSA lingers from patent history but loses on modern metrics.

Schnorr Signatures vs. ECDSA: Lessons from Bitcoin's Upgrade and the PS3 Debacle

Sony's PS3 fortress fell in 2010 when hackers exploited ECDSA's weak randomness. Fast-forward: Bitcoin ditches ECDSA for Schnorr—smarter math securing trillions.

theAIcatchup Apr 10, 2026 4 min read

Elliptic curve diagram showing Schnorr signature points R, P, and verification equation sG = R + eP

⚡ Key Takeaways

Schnorr signatures enable efficient aggregation, slashing Bitcoin tx costs by up to 40%. 𝕏
PS3 hack exposed ECDSA's nonce reuse peril—predictable k leaked Sony's keys. 𝕏
Bitcoin's Taproot upgrade proves Schnorr's market edge over legacy ECDSA. 𝕏

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#bitcoin-taproot #digital-signatures #ecdsa #ps3-hack #schnorr-signatures

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Originally reported by Dev.to

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