Does that means...

By: Anonymous (nospam.delete@this.nospam.com), July 23, 2004 3:10 pm
Room: Moderated Discussions
Jan (jvorbrueggen@mediasec.de) on 7/23/04 wrote:
---------------------------
>>Now, how long before someone hacks the Intel encoding of their processor patches ?
>
>If they did it properly using asymmetric cryptography, you won't.
>

It's most likely a one time pad combined with a special CRC algorithm. Public key encryption was far too complex to implement in microcode or hardware back when Intel designed the update format for the Pentium II around 1996. That same basic format is used today (although the specific encryption algorithm might have changed.)

An extremely well equipped engineer could probably analyze the P4 die itself to extract the key mask and maybe the signature algorithm; it's fairly well established where in the circuitry this takes place. However, it's unlikely someone would waste the time and money doing this just out of curiosity. Only major competitors would be interested, which basically means AMD - and they clearly have no problem developing their own technology without reverse engineering Intel's design.
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Opteron Exposed: Reverse Engineering AMD K8 Microcode UpdatesAnonymous2004/07/22 01:39 AM
  Opteron Exposed: Reverse Engineering AMD K8 MicrocDresdenboy2004/07/22 05:13 AM
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      Opteron Exposed: Reverse Engineering AMD K8 MicrocDresdenboy2004/07/22 10:26 AM
        the former posting has no new text, continue hereDresdenboy2004/07/22 10:32 AM
  An additionDresdenboy2004/07/22 08:04 AM
    An additionAnonymous2004/07/22 02:32 PM
      An additionDresdenboy2004/07/22 02:55 PM
  Opteron Exposed: Reverse Engineering AMD K8 Microctom vier2004/07/22 08:38 AM
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    Opteron Exposed: Reverse Engineering AMD K8 MicrocIgor2004/07/23 10:00 PM
      Opteron Exposed: Reverse Engineering AMD K8 MicrocKronos2004/07/24 02:04 PM
  Opteron Exposed: Reverse Engineering AMD K8 Microcode UpdatesMax2004/07/22 01:01 PM
    Opteron Exposed: Reverse Engineering AMD K8 Microcode UpdatesAnonymous2004/07/22 05:26 PM
  Does that means..._Arthur2004/07/22 10:01 PM
    Does that means...Dresdenboy2004/07/23 03:27 AM
    Does that means...Jan2004/07/23 07:51 AM
      Does that means...Anonymous2004/07/23 03:10 PM
        Does that means...Igor2004/07/23 10:42 PM
          Does that means...Anonymous2004/07/24 09:53 PM
            Does that means...Igor2004/07/25 12:08 AM
            Does that means...Anonymous2004/07/25 12:17 AM
              Does that means...anonymous2004/07/25 04:31 PM
                Does that means...Igor2004/07/26 08:42 PM
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    Permanent virusesAnonymous2004/07/27 10:42 AM
  Finding candidates to replace their microcodeDresdenboy2004/08/19 02:06 AM
    Finding candidates to replace their microcodePaul DeMone2004/08/19 06:22 AM
      Finding candidates to replace their microcodeDavid Kanter2004/08/19 06:53 AM
        Finding candidates to replace their microcodefoobar2004/08/19 09:55 AM
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          Finding candidates to replace their microcodeAnonymous2004/08/20 01:56 PM
            Finding candidates to replace their microcodehobold2004/08/23 03:14 PM
      Finding candidates to replace their microcodeDresdenboy2004/08/19 10:59 AM
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          Finding candidates to replace their microcodeGroo2004/08/20 09:25 PM
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      Finding candidates to replace their microcodeMatt Craighead2004/08/19 01:18 PM
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          Finding candidates to replace their microcodeRick C. Hodgin2004/08/22 08:31 AM
            Finding candidates to replace their microcodeanonymous2004/08/23 08:56 AM
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