Editing Semantic security (section)

==== Sony PlayStation 3 ECDSA Failure (2011) ====
Sony’s [[PlayStation 3]] misused the [[Elliptic Curve Digital Signature Algorithm]] (ECDSA) by reusing the same [[Cryptographic nonce|nonce]] - a random number used once in cryptographic signing - in multiple signatures. Since ECDSA relies on unique nonces for security, attackers recovered Sony’s private signing key, allowing them to sign unauthorized software.<ref>{{cite web |last=Schneier |first=Bruce |date=2011-01-06 |title=Sony PS3 Security Broken |url=https://www.schneier.com/blog/archives/2011/01/sony_ps3_securi.html |access-date= |publisher=Schneier on Security}}</ref>