Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Questions about hdcpRngCipher implementation

Status
Not open for further replies.

floatgrass

Member level 3
Joined
May 7, 2002
Messages
67
Helped
2
Reputation
4
Reaction score
1
Trophy points
1,288
Activity points
517
I am doing hdcp. I have a question about hdcpRngCipher implementation.

1 first AN value is generated by using random number seed.
2 other AN value is generated by hdcpBlockCipher sequence and mi,ki.

I want to ask which modules can work during hdcpRngCipher? if the operation mode is same hdcpBlockCipher, why last specification said that Rekey signal may but need not be enabled? (in fact hdcp BlockCipher need 56 clocks rekey enable.)

thanks!
 

ravimln

Newbie level 1
Joined
Mar 25, 2008
Messages
1
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,285
Re: hdcp

HI

You need to run the CM0 (block cipher without rekey enable). Here you are generating a new AN value. If rekey is enabled you are giving the LM0 output as input to BM0. So no need of REkey enable when running rngcipher.
 

floatgrass

Member level 3
Joined
May 7, 2002
Messages
67
Helped
2
Reputation
4
Reaction score
1
Trophy points
1,288
Activity points
517
Re: hdcp

thanks for your reply.
you means LM0 is lfsr module, BM0 is block module in hdcp cipher structure?
CM0 is block module and output function?

the right usage of hdcprngcipher :
1 let CM0 work for some clocks to produce an after power on ?

2 let CM0 work 56 clocks to porduce an after auth request ?

3 random number seed is used as b and k register value?


thanks!
 

vlsi_freak

Full Member level 2
Joined
Sep 3, 2007
Messages
129
Helped
14
Reputation
28
Reaction score
8
Trophy points
1,298
Activity points
2,054
Re: hdcp

Hi All...

Please let me know if there any standard HDCP chips/IP availble in market.
I want to know the IO level details of HDCP.

Please share your ideas....

Regards,
freak
 

Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top