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Though OCOTP_LOCK[SRK_LOCK] was set, SRKs in the shadow registers can be seen.

Question asked by George Fukutomi on Aug 19, 2015
Latest reply on Aug 21, 2015 by George Fukutomi

Dear All,

 

We use HAB.

And OCOTP_LOCK[SRK_LOCK] was set.

 

However, the keys can be seen via the shadow registers.

Is this the correct behavior?

 

Writen Lock Register :

  • OCOTP_LOCK => 0x00004040 (SRK_LOCK, SJC_RESP_LOCK)

 

Read Shadow Registers :

  • 21B_C580  OCOTP_SRK0  (The written key value)
  • 21B_C590  OCOTP_SRK1  (The written key value)
  • 21B_C5A0  OCOTP_SRK2  (The written key value)
  • 21B_C5B0  OCOTP_SRK3  (The written key value)
  • 21B_C5C0  OCOTP_SRK4  (The written key value)
  • 21B_C5D0  OCOTP_SRK5  (The written key value)
  • 21B_C5E0  OCOTP_SRK6  (The written key value)
  • 21B_C5F0  OCOTP_SRK7  (The written key value)
  • 21B_C600  OCOTP_RESP0  0xBADABADA
  • 21B_C610  OCOTP_RESP1  0xBADABADA

 

Is there something where you noticed ?

 

Best Regards,

George

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