z/OS Security Server RACF Security Administrator's Guide
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Bypassing PassTicket replay protection

z/OS Security Server RACF Security Administrator's Guide
SA23-2289-00

You might use the option to bypass PassTicket replay protection when the threat of PassTicket replay is not a security concern, such as in the following cases:
  • Multiple end-users who share the same user ID
  • Trusted registry domains that exchange PassTickets as a method of establishing trust
  • Applications that request PassTickets for a particular USERID/APPLID combination more than once during a one-second time interval.

The option to bypass PassTicket replay protection allows the plus-or-minus-10-minute PassTicket replay protection to be bypassed for selected applications or combinations of selected applications, users, or groups.

You indicate that replay protection is to be bypassed for a particular application by adding the text string NO REPLAY PROTECTION to the APPLDATA field of the PTKTDATA profile for that application. You must separate each word in the string with a single blank space, alphanumeric character, or keyboard symbol. The NO REPLAY PROTECTION text string will always be translated to upper case by the RALTER or RDEFINE commands.

The NO REPLAY PROTECTION text string can appear anywhere within the APPLDATA field, allowing for the existence of other information already in the field, or for new information that might be added in the future.

The following are examples of commands that will cause PassTicket replay protection to be bypassed.

Examples:
RALTER  PTKTDATA profile-name APPLDATA('NO REPLAY PROTECTION')
RDEFINE PTKTDATA profile-name APPLDATA('NO REPLAY PROTECTION')
RDEFINE PTKTDATA profile-name
   APPLDATA('FOR THIS APPLICATION NO REPLAY PROTECTION IS IN EFFECT')
Note:
  1. The option to bypass PassTicket replay protection should only be used in secure environments where access to generated PassTickets is limited within a secure or internal network.
  2. Other than the APPLDATA (application data) field of the application profile containing the text string, NO REPLAY PROTECTION, there is no other external indication that replay protection is bypassed.

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