The patents were filed in 1999 and 2001 respectively, and in 2003 the National Security Agency paid $25 million for the right to use 26 of Certicom's patents, including the two that Sony is alleged to have infringed on.
这些专利分别在1999年和2001年申请，且美国国家安全局在2003年支付25万美元来使用certicom的26项专利，其中包括其认为索尼侵犯的两项。