Slack’s 2020 Security White Paper outlines its defense-in-depth approach to protecting customer data. Security is aligned with ISO 27000, AICPA Trust Principles, and NIST standards, overseen by a dedicated CSO-led team. Data is encrypted in transit (TLS 1.2, AES-256) and at rest with FIPS 140-2 compliance. Slack enforces least-privilege access, MFA, and password manager use, with hardened servers, segmented networks, and endpoint protections. Continuous monitoring, logging, and alerting support rapid incident detection. Disaster recovery includes geo-redundancy and daily backups. External validation involves audits, certifications, penetration testing, and customer-driven assessments.

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