Jan 2, 2011
GeoHot releases Root Signing key for the PS3.
Febuary 16, Bret (Trixter) McDanel pokes around in the PSN trying to reverse engineer connection protocols and chat protocols. Essentially breaking the trust model of PSN by issuing a self signed cert and bouncing off a proxy he controlled.
(Wired Details some of that)
Rebug Released Late March (3.55.1) allowed access to the Dev-PSN using the RootKey
SOE Fires 205 Employees the same day Rebug 3.55.1 is released.
DDOS Performed against Sony by Anonymous for filing Suit against GeoHot. Claims by many, including Sony, was this was used as a great distraction by the malicious attacker.
PSN goes offline April 20th.
a Week later, Sony says happened.
PSN and Qrocity data exposure (77 Million Customer Records including 10 million Credit Card numbers)
SOE Announces "No Breach Has occured"
Days later, SOE announces, we're sorry our bad, 24.6 million accounts were actually compromised.
Lots more came after that:
So-Net, Sony Greece, Sony Erikson Canada, Sony Thailand, Sony Music Japan, Sony Music Indonesia, Sony Pictures