• X9 TG-25-1999
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X9 TG-25-1999

  • Technical Guideline: Managing Risk and Migration Planning: Withdrawal of ANSI X9.23, Encryption of Wholesale Financial Messages
  • standard by Accredited Standards Committee X9 Incorporated, 01/01/1999
  • Publisher: X9

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Based on certain attacks on 56 bit DES described in detail in chapter 6, it is the consensusof X9 that ANSI X9.23-1995 no longer provides sufficient security to protect wholesalefinancial transactions. Hence, X9.23 is being withdrawn.

This Guideline discusses:
  • using new technology to provide integrity protection for wholesale financialmessages,
  • transitioning from X9.23 to the new technology, and
  • measures can be taken to ameliorate the risk inherent in X9.23 during thetransition period.
Please do not misunderstand the intent of this guideline. Continue to use single DESbased X9.23 until a replacement is implemented. Until the replacement is implemented,there are

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