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參數(shù)資料
| 型號(hào)： | L12-TCPA-PALLADIUM |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | TCPA and Palladium |
| 中文描述： | 城鄉(xiāng)規(guī)劃和鈀 |
| 文件頁數(shù)： | 10/12頁 |
| 文件大小： | 131K |
| 代理商： | L12-TCPA-PALLADIUM |
10
8
POLICY ISSUES
How do we do this
Use the PCR value to “brand” encrypted secrets with the identity of the code that “owns”
them
Owners of secrets can also designate alternate recipients (necessary for update and Palladium
migration)
Attestation
Attestation lets a remote client know what software is running. This authentication technology, is
more than a “simple signing;” Attestation enables authentication of a software configuration (nexus,
application, process).
Code authenticates itself using the SSC quote function:
–
Quot(
S
)
→
Sign[
S
|
PCR
]
This provides a protocol building block:
–
For example, in a Server/peer protocol
The server checks the signature, checks certificates on signing key, checks nexus digest
is as expected
Then, it knows the client is a “MS Nexus on Acme Trusted Platform”
Implementation: RSA using SSC key pair
No anonymity at this low level. Can only use the hardware key ONCE per power cycle.
To preserve anonymity, use the hardware key to create pseudo-identities to provide indi-
rection/anonymity while still providing platform attestation. Being able to create pseudo-
identities requires the presence of trusted third parties which do not exist at present. Microsoft
is looking into encouraging such markets.
8
Policy Issues
Some of the technical issues we have to solve are policy issues.
You want to have a piece of technology that you can hold up any time anyone starts to complain
about social problems. For instance, you’re worried about a child viewing pornography on net
Don’t make pornography illegal; make a chip that protects kids.
So how do we build an attestable TCB (trusted computing base): open, auditable, and com-
prehensible
Since the Palladium RSA key is unique what steps should we take to defend against traffic
analysis and behavior
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