Page 374 - CyberSecurityEssentialsEnglish
P. 374

An exit plan is not pessimism; it is the condition for avoiding vendor lock-in and the loss of
         the ability to operate.

























                                       FIGURE 8-6: THE LIFECYCLE OF A RESPONSIBLE USE


         What to notice: Seven connected stages from registration to retirement, with decision gates
         that prevent moving on without evidence proportionate to the level of risk.

         Source:  Prepared  by  the  author,  drawing  on  established  risk  management  and  impact
         assessment guidance [2][4].

         TABLE 8-6: DECISION GATES ACROSS THE LIFECYCLE

                 Gate            The question it settles                Evidence required to pass


                              Is this a real problem worth       A described problem, an owner, and an
             Registration
                                         solving?                           expected outcome.

                Impact        Who could be harmed, and            Affected groups, harm scenarios, and

             assessment                    how?                               named controls.

             Pre-release        Does it work well enough          Acceptance results on representative
                testing                for this use?                          and edge cases.

                                   Does it hold in real         Measured indicators and a documented
                 Pilot
                                       conditions?                                rollback.

                                Under what scope may it          Stated conditions, limits, and a decision
               Approval
                                         operate?                                  owner.


                Change          Has something material            Re-tested results after an update or a
                review                   shifted?                              new purpose.

                                                                Revoked access, retained records, and a
             Retirement        How do we stop it safely?
                                                                             replacement plan.




        373
   369   370   371   372   373   374   375   376   377   378   379