History

• 2003 - TPM 1.1b

• 2005-2009 - TPM 1.2

  • Standard software interface

    • While keeping previous APIs

• Mostly standard package pinout

• Protection against dictionary attacks

• More privacy-related features

• Non-volatile RAM

• Certified Migratable Keys (CMKs)

• Ability to synchronize an internal timer with an external clock

From TPM 1.2 to 2.0

In 2000, the TCG chose the TPM hash algorithm.

• Preferring SHA-1 over MD5.

• TPM 1.2 relies a lot on SHA-1.

  • Which was first successfully attacked in 2005.

TPM 2.0 was conceived to allow alternative digest algorithms.

• As well as alternatives to all cryptographic algorithms.

• It also introduced symmetric cryptography.

  • For implementing hybrid cyphers.