[keycloak-dev] Using keycloak token as secret key for Des to encrypt banking transaction

In order to share secret key for Des as symetric algorithm To encrypt transaction data shared between mobile device and backend microservices I m thinking to use keycloak token (code grant flow selected) Because it have timetolive infinispan and regrouped information container in scope mappers Is it right choice or there is a vulnérabilités WE will consider refresh token in m'y flow Any advice or proposition is weclome. @Stian Best regards thanks in avance.