ISO/IEC 27001 Information Security Management System (ISMS) sertifikasyonu. Maliyet: audit ücreti $10k-30k (initial), yıllık surveillance $3k-10k. Timeline: 6-12 ay (documentation, implementation, audit cycle). Benefit: customer confidence, competitive advantage, regulatory compliance (GDPR alignment), risk reduction. Audit type: Gap analysis (0-1 month, estimate scope), implementation (3-6 months, policy/procedure documentation, security control deployment), pre-audit (2-4 weeks), certification audit (1-2 weeks, on-site inspection by accredited auditor). Kontrol alanları (14 main areas): Asset management, Access control, Cryptography, Physical/environmental security, Operations security, Communications security, System acquisition/development, Supplier relationships, Information security incident management, Business continuity, Compliance. Implementation: Designate ISMS owner, form security committee, document current state (baseline), map to ISO 27001 requirements, remediate gaps (new tools, policy updates), train employees, internal audit, management review, external audit. KVKK alignment: ISO 27001 Technical + Organizational measures fulfill KVKK Article 32 requirement.