The present document addresses the Information Security Management System of Data Preservation Systems@ by specifying Security requirements for Data Preservation Service Providers to abide by@ when implementing and managing a DPS@ in order to provide Data Preservation Services that are trustable and reliable from the Information Security viewpoint. Sister document TR 101 533-2 [i.24] provides recommendations on how to assess electronic data preservation services against the provisions specified in the present document. These measures are based on provisions of ISO/IEC 27001 [1]@ ISO/IEC 27002 [2] and TS 102 573 [3]@ enhancing them where necessary. The present document does not address specific document management related issues that are addressed by a number of ISO standards@ such as ISO 14721 [i.5]@ ISO 15489 [i.17]@ ISO 23081 [i.27] and@ more in general@ those dealt with by ISO/TC 46/SC11 which the reader of the present document should refer to. NOTE The present document and its sister document TR 101 533-2 [i.24] can be referred to by various archival management standards and standard families as a complementary and detailed set of specifications through which a reliable Information Security Management System can be implemented@ managed and assessed@ as regards the Data Preservation peculiarities.