What's New

[6.0.1] - 2018-05-04

Changed

  • Updated Intel(R) IPP Cryptography library to version 2018 (Update 2.1).

Fixed

  • The member library now includes the tpm2 subcomponent when built using SCons, instead of requiring a separate member.tpm2 library.

Known Issues

  • Only the SHA-256 hash algorithm is supported when using the SDK with the IBM TPM simulator due to a defect in version 532 of the simulator.
  • Basenames are limited to 124 bytes in TPM mode.
  • Scons build will not work natively on ARM. You can still build using make or cross compile.

[6.0.0] - 2017-12-15

Added

  • The member can now be built with a substantially reduced code size using a compilation option.
  • New context lifetime management APIs have been added to member to give callers more control of memory allocation.
  • New member API EpidClearRegisteredBasenames has been added to clear registered basenames without recreating the member.

Changed

  • EpidRegisterBaseName was renamed to EpidRegisterBasename because basename is a single word.
  • Command-line parsing library used by samples and tools has been replaced by Argtable3.

Deprecated

  • EpidMemberCreate has been deprecated. This API has been superseded by EpidMemberGetSize and EpidMemberInit.
  • EpidMemberDelete has been deprecated. This API has been superseded by EpidMemberDeinit.

Removed

  • size_optimized_release build configuration has been removed. Use the compilation option to build member with reduced code size.

Known Issues

  • Only the SHA-256 hash algorithm is supported when using the SDK with the IBM TPM simulator due to a defect in version 532 of the simulator.
  • Basenames are limited to 124 bytes in TPM mode.
  • Scons build will not work natively on ARM. You can still build using make or cross compile.

[5.0.0] - 2017-09-15

Added

  • The member implementation now has the option to support signing using a TPM, using the ECDAA capabilities of TPM 2.0.

Changed

  • Member API updated to unify HW and SW use cases.
    • Added
      • ProvisionKey
      • ProvisionCompressed
      • ProvisionCredential
      • Startup
    • Parameters changed
      • MemberCreate
      • RequestJoin
    • Removed or made private
      • WritePrecomp
      • SignBasic
      • NrProve
      • AssemblePrivKey
  • EpidRequestJoin was renamed to EpidCreateJoinRequest to make it clear that it is not directly communicating with the issuer.

Fixed

  • EpidCreateJoinRequest creates valid join requests. This fixes a regression in EpidRequestJoin introduced in 4.0.0.

Known Issues

  • Only the SHA-256 hash algorithm is supported when using the SDK with the IBM TPM simulator due to a defect in version 532 of the simulator.
  • Basenames are limited to 124 bytes in TPM mode.

[4.0.0] - 2017-04-25

Added

  • The member implementation now provides an internal interface that gives guidance on partitioning member operations between highly sensitive ones that use f value of the private key, and less sensitive operations that can be performed in a host environment.
  • New member API EpidAssemblePrivKey was added to help assemble and validate the new member private key that is created when a member either joins a group (using the join protocol) or switches to a new group (as the result of a performance rekey).

Changed

  • Updated Intel(R) IPP Cryptography library to version 2017 (Update 2).
  • The mechanism to set the signature based revocation list (SigRL) used for signing was changed. EpidMemberSetSigRl must be used to set the SigRL. The SigRL is no longer a parameter to EpidSign. This better models typical use case where a device stores a revocation list and updates it independently of signing operations.

Removed

  • Removed EpidWritePreSigs API. Serialization of pre-computed signatures is a risky capability to provide, and simply expanding the internal pool via EpidAddPreSigs still provides most of the optimization benefits.
  • The EpidIsPrivKeyInGroup API is no longer exposed to clients. It is no longer needed because the new member API EpidAssemblePrivKey performs this check.

Fixed

  • When building with commercial version of the Intel(R) IPP Cryptography library, optimized functions are now properly invoked, making signing and verification operations ~2 times faster
  • SHA-512/256 hash algorithm is now supported.
  • README for compressed data now correctly documents the number of entries in revocation lists.
  • The verifysig sample now reports a more clear error message for mismatched SigRLs.
  • The default scons build will now build for a 32-bit target on a 32-bit platform.

Known Issues

  • Scons build will not work natively on ARM. You can still build using make or cross compile.

[3.0.0] - 2016-11-22

Added

  • Support for verification of Intel(R) EPID 1.1 members.
  • Make-based build system support.
  • Sample material includes compressed keys.
  • Enhanced documentation, including step-by-step walkthroughs of example applications.
  • Validated on additional IoT platforms.
    • Ostro Linux
    • Snappy Ubuntu Core

Changes

  • A new verifier API has been added to set the basename to be used for verification. Verifier APIs that used to accept basenames now use the basename set via EpidVerifierSetBasename.
  • The verifier pre-computation structure has been changed to include the group ID to allow detection of errors that result from providing a pre-computation blob from a different group to EpidVerifierCreate.

Fixes

  • The kEpidxxxRevoked enums have been renamed to be consistent with other result return values.

Known Issues

  • SHA-512/256 hash algorithm is not supported.

[2.0.0] - 2016-07-20

Added

  • Signed binary issuer material support.
    • Binary issuer material validation APIs.
    • Updated sample issuer material.
    • Updated samples that parse signed binary issuer material.
  • Compressed member private key support.
  • Validated on additional IoT platforms.
    • Windows 10 IoT Core
    • WindRiver IDP

Changed

  • The default hash algorithm has changed. It is now SHA-512.
  • Functions that returned EpidNullPtrErr now return EpidBadArgErr instead.

Fixed

  • Updated build flags to work around GCC 4.8.5 defect.

[1.0.0] - 2016-03-03

Added

  • Basic sign and verify functionality
  • Dynamic join support for member
  • Apache 2.0 License