Chaves privadas roubadas à Opera

A notícia fala de certificados mas obviamente refere-se às chaves privadas usadas para assinar software:

"Hackers penetrated network servers belonging to Opera Software, stole at least one digital certificate, and then used it to distribute malware that incorrectly appeared to be published by the browser maker."

http://arstechnica.com/security/2013/06/attackers-sign-malware-using-crypto-certificate-stolen-from-opera-software/