The technical specification deals with the implementation, management and evaluation of Information Security Management Systems (ISMS) of Data Retention Systems (DPS), providing additional indications to what is specified in the documents ETSI TS 101 533-1, ETSI TR 101 533-2 as translated in documents E14J1G501 and E14J1G502, whose indications and requirements indicated are applicable as an integral part of this standard, unless otherwise indicated.