Hello all,

I'm trying to figure out how to generate the MAC for application data in TLS
v1.

The rfc (2246) says at § F.2 "protecting application data" 
"Outgoing data is protected with a MAC before transmission. To prevent 
   message replay or modification attacks, the MAC is computed from the 
   MAC secret, the sequence number, the message length, the message 
   contents, and two fixed character strings." 

What are the "two fixed character strings"?

TIA
Regards,
Avinash
  

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