trusted computing for security confe.ppt

Trusted Computing
BY: Sam Ranjbari
Billy J. Garcia

What is it?
Trusted Computing (TC) is an open standard
for hardware enabled trusted computing
and security technologies.
This means a more secure PC that only
trusts the software creators not the owner

Trusted Computing
 TC was created by the non-for-profit
organization Trusted Computing Group
(TCG);
 An alliance of Microsoft, Intel, IBM, HP,
AMD and …
 A list can be found at this link
https://www.trustedcomputinggroup.org/a
bout/members/

What does Trust mean?
 Trust means that something does as it is intended to do
 TCG defines trust as “an entity can be trusted if it always
behaves in the expected manner for the intended
purpose”.
 For example, when you save or read something from
your hard drive, you want the data to be written and
read accurately like it is intended to be, but you have to
trust it to write and read without errors.

Who do I trust? Me!
 Today a computer trusts one of two entities in a
user and hacker model.
 The user is trusted and the hacker is not.

Continue
 But when does a computer know that the
user is not doing something harmful?
 With TC the user and the hacker are both
not trusted. This ensures that nothing is
done that can compromise the security of
the PC.

So How does TC work?
 For TC to work you have to use the
Trusted Computing Module (TPM) which is
a hardware system where the core (root)
of trust in the platform will reside.
 TPM will be implemented using a security
microchip that handles security with
encryption.

Groups of secure hardware
 They are memory curtaining, secure input and
output, sealed storage, and remote attestation.
 It is also important to mention the concept of the
endorsement key.
 The endorsement key is a 1,048 bit RSA private and
public key that is created randomly on a microchip
during the manufacturing of the chip. The private key is
only used by the chip while the public key is used for
attestation and for the encryption of sensitive data sent
to the chip.


endorsement key
 The key is used to allow secure
transactions by the TPM using a
protocol created by TCG. This
prevents a TPM emulator from
starting a trusted entity. TPM is also
designed to prevent extraction of the
key from hardware analysis

…Groups of secure Hardware
 Memory curtaining is hardware
enforced memory isolation that will
prevent software from being able to read
or write to other software’s memory.
 Today hackers can read memory and alter
applications’ memory to do evil deeds that
are not intended.

 Secure input and output will prevent threats
from key loggers or screen grabbers from
intruders.
 Using encrypted input and output will prevent
the intruders from being able to see what the
user types or what is on the users screen
because the input from the keyboard to the
software and the output from the software to
the screen are encrypted.

 Today hard drives are insecure by storing
cryptographic keys on a hard drive that intruders
can access.
 User’s passwords, documents, and other
information are also unprotected on today’s
storage.

 With sealed storage the keys are generated
using the hardware and the software
 For example, when you install a email client on a
set of hardware a key is generated and used for
the data that is saved and read from the email
client.
 If a virus is running on the PC it will not be able
to read the email because the virus and the
hardware combo generate a different key!

 With remote attestation a certificate is generated in
hardware of the software installed and running on a
computer.
 This allows software writers to check and ensure that
their software is unmodified and has not been hacked.
 Identity of the software is verified with a hash that will
change if the software has been changed.
 Since the hash is compared to a remote hash the
intruder has no way of forging altered software.

Trusted Computing
 Not only TC is used for PCs but it is also going to
be used for more hardware such as set top
boxes, mobile phones, servers, storage devices,
networks and more.


Trusted Computing
 So when will we see TC being used?
 For TC to work you have to have hardware
with the TPM, and software to work with the
TPM. Windows Vista is the next generation
operating system by Microsoft that will make
use of TC, although Microsoft likes to call it
Trustworthiness.

Trusted Computing
 So far both AMD and Intel are working on
a new processor to use TPM.
 Well, who would want to use TC?
 So far the computer industry is supporting TC
and the Army wants all of their computers by
2010 to use a secure model such as TC.

Use of Trusted Computing
 Other software that uses TC are openTC,
EMSCB, Forum for Open SW based TC,
Enforcer, Next-Generation Secure
Computing Base (NGSCB), TruoSerS – The
open-source TCG Software Stack, and
Trusted Java.

Conclusion
 Trusted Computing is an industry standard
created to protect a user from intruders and
unsafe actions.
 With Trusted Computing the PC will decide who
should be trusted and what is safe and unsafe
using the Trusted Platform Module.
 By default no one is trusted except the hardware
and the software publishers. Not even the PC
users are trusted. TC was created for our
benefits for sure…

trusted computing for security confe.ppt

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