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Attacking Intel ® Trusted Executio
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Intel ® Trusted Execution Technolo
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TPM 1.2 Passive I/O device (master-
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PCR “extend” operation PCRN+1 =
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TPM seal/unseal example # echo 'Sec
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Both seal/unseal and quote operatio
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BIOS ROM BIOS FLASH BOOT LOADER OS
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Example #1: Disk Encryption Disk en
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So, a malware can sniff it…
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Example #2: User’s Picture Test :
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Problems with SRTM
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Dynamic Root of Trust Measurement (
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A VMM we want to load (Currently un
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TXT bottom line TXT late launch can
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GRUB (1 st stage) GRUB (2 nd stage)
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First we start “trusted” Xen (b
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Thanks to tboot only when the trust
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Tboot Demo #1: sealing to a trusted
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SENTER is not obligatory!!! TXT and
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Why would a user or an attacker be
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AMD Presidio AMD’s technology sim
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SRTM/DRTM (launch-time protection)
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TXT: exciting new technology with g
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Q: What is more privileged than a k
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Introducing “Ring -2” SMM can a
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SMM vs. TXT?
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Q: Does TXT measure currently used
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Q:So, how does the SENTER deal with
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TXT attack sketch (using tboot+Xen
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Address of the shellcode (in the gu
- Page 67: The final outcome...
- Page 70 and 71: Stay tuned! SMM exploiting to be pr
- Page 73 and 74: More on the Implementation Bugs
- Page 75 and 76: SMM research quick history
- Page 77 and 78: No SMM bugs known... ...cannot read
- Page 79: De-soldering?
- Page 84 and 85: De-soldered SPI-flash chip
- Page 86 and 87: The BIOS image on the SPI-flash is
- Page 88 and 89: Remember our Q35 bug from Vegas? (W
- Page 90 and 91: Now, applying this to SMM...
- Page 95 and 96: We see we can access SMM memory usi
- Page 97 and 98: So, what now?
- Page 99 and 100: December 2008: Intel We think TXT i
- Page 101 and 102: Intel confirmed the problems in the
- Page 103 and 104: Intel believes the issues might aff
- Page 105 and 106: CERT has assigned the following tra
- Page 107 and 108: Stay tuned! (and don’t trust your
- Page 109 and 110: Intel Solution to the TXT attack is
- Page 111 and 112: Potential issues with STM STM seems
- Page 113 and 114: Intel Why should we trust BIOS vend
- Page 115: Intel offered us a chance to read t
- Page 119 and 120: Still, allowing TXT to work without
- Page 121 and 122: Intel TXT is a new exciting technol
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