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GreenC bot (talk | contribs) Rescued 2 archive links. Wayback Medic 2.5 per WP:URLREQ#google.com/patents |
GreenC bot (talk | contribs) Move 2 urls. Wayback Medic 2.5 per WP:URLREQ#google.com/patents |
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On 30 May 2007, Canadian encryption vendor [[Certicom]] sued Sony alleging that AACS violated two of its patents, "Strengthened public key protocol"<ref>
{{cite web
|url=
|title=Strengthened public key protocol
|access-date=31 May 2007
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</ref> and "Digital signatures on a Smartcard."<ref>
{{cite web
|url=
|title=Digital signatures on a Smartcard
|access-date=31 May 2007
|