Overview
SIST EN ISO/IEC 27555:2025 provides essential guidelines for the deletion of personally identifiable information (PII) in organizations. Developed by the Slovenski inštitut za standardizacijo (SIST) and harmonized with ISO/IEC 27555:2021, this standard serves as a foundational reference for PII controllers and processors, focusing on information security, cybersecurity, and privacy protection. It equips organizations that store or process PII with a systematic approach to establishing policies, procedures, and documentation for effective data deletion. The standard promotes a harmonized terminology and a structured method for defining deletion rules, ensuring clarity and compliance across industries handling sensitive personal data.
Key Topics
- Harmonized Terminology: Establishes a standardized vocabulary for PII deletion, supporting consistent communication within and across organizations.
- Framework for Deletion Rules: Outlines how to define, document, and implement deletion rules tailored to various clusters of PII, while minimizing complexity.
- Required Documentation: Provides guidelines on recording deletion processes, responsible parties, retention periods, and audit trails to support transparency and accountability.
- Roles and Responsibilities: Describes the allocation of tasks and oversight among roles such as PII controllers, processors, and privacy officers.
- Clusters of PII: Explains grouping of PII according to their functional purposes, promoting efficient management and rule application.
Please note: The standard does not address specific national legal obligations, technical deletion mechanisms, or detailed deletion techniques.
Applications
The applications of SIST EN ISO/IEC 27555:2025 are broad and significant for organizations seeking to enhance their privacy protection and fulfill compliance requirements:
- Policy Development: Assists organizations in creating or refining information security policies related to PII retention and deletion, reducing risk of non-compliance.
- Operational Procedures: Guides the establishment of standardized deletion periods, regular deletion reviews, and auditable processes for data minimization and lifecycle management.
- Cross-Departmental Roles: Enables clear assignment of PII-related responsibilities among IT, compliance, security, and business units.
- Backup and Archiving: Offers direction for handling PII in backups and archives, ensuring alignment with deletion rules while maintaining operational integrity.
- Supporting Privacy Rights: Facilitates responses to data subject requests, such as the right to erasure (“right to be forgotten”), by setting up systematic deletion frameworks.
This standard is particularly relevant for sectors with stringent PII handling requirements, including healthcare, telecommunications, finance, and any organization seeking consistent practices for personal data management.
Related Standards
SIST EN ISO/IEC 27555:2025 aligns with a network of international standards to support comprehensive privacy management:
- ISO/IEC 29100: Defines the overarching privacy framework, including core PII protection principles.
- ISO/IEC 27001: Information security management systems, offering guidance for overall security controls.
- ISO/IEC 27701: Extension to ISO/IEC 27001 for privacy information management.
- ISO/IEC 20889: Offers guidelines for data de-identification techniques, referenced for cases where irreversible de-identification is preferable to deletion.
Organizations implementing SIST EN ISO/IEC 27555:2025 are encouraged to consider these related standards for a holistic approach to information security and privacy protection.
Keywords: information security, cybersecurity, privacy protection, personally identifiable information deletion, PII deletion, data deletion policies, retention periods, data minimization, ISO/IEC 27555:2021, SIST standards, deletion rules, privacy compliance.