CISSP Certification: Most Detailed Course on Domain 2 - 2026

Explore asset classification and labeling using military/government and private sector models, define data states, outline security requirements, and review encryption methods for protecting sensitive data.

Classify and label data by criticality per policy, and protect sensitive data, including PII, PHI, and proprietary data, such as names, addresses, SSN, and birth details.

Compare military and government data classifications—top secret, secret, confidential, unclassified—with corporate schemes—confidential/proprietary, private, sensitive, public—and highlight how harm and unauthorized disclosure drive security controls.

Define data classification to determine minimum security measures, apply encryption and other controls, and enforce consistent protections with a DLP system to prevent data leakage.

Explore how data exists in three states—at rest, in use, and in transit—and the protection measures that secure each state.

Label and classify sensitive data to prevent disclosure, manage declassification and lifecycle controls, and use metadata and audit trails with DLP to track access; secure storage with encryption at rest.

Explore methods to destroy sensitive data, from erasing and clearing to purging, declassification, sanitization, degaussing, and physical destruction, and learn retention considerations for compliance.

Explore how cryptography protects confidentiality by encrypting data at rest with AES, 3DES, and Blowfish, and securing data in transit with TLS, IPsec, VPNs, and SSH.

Identify and classify data roles across the organization, including data owner, system owner, business and mission owners, data processors, administrators, custodians, and users.

Identify and differentiate the data roles—data owner, system owner, business owner or mission owner, data processor, administrator, custodian, and user—and apply classification and need-to-know access to protect data.

Protect privacy by showing how laws set security requirements for data a company collects, uses, and handles, depending on location, including PHI, PII, California Online Privacy Protection Act, and GDPR.

Define security baselines as the minimum controls and apply scoping, tailoring, and compensating controls to meet business needs, guided by standards like NIST and PCI DSS for consistent compliance.

Recap asset security by reviewing data classification and labeling using government and corporate schemes, securing data at rest, in use, and in transit, and outlining encryption, retention, and data roles.

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