Java Security Advance — Lesson 2: Cryptography, Keys, Certificates, Keystores, PKI, and TLS Hardening

Learning Objectives

• Explain the purpose and operating context of symmetric and asymmetric encryption, signatures, hashes, MACs, and KDFs.
• Apply key generation, storage, rotation, destruction, and secret separation and KeyStore, certificates, chains, trust stores, revocation, and PKI in a controlled environment.
• Validate outcomes and troubleshoot risks involving TLS contexts, protocols, cipher suites, hostname validation, and mutual TLS.

Detailed Topics

• symmetric and asymmetric encryption, signatures, hashes, MACs, and KDFs
• key generation, storage, rotation, destruction, and secret separation
• KeyStore, certificates, chains, trust stores, revocation, and PKI
• TLS contexts, protocols, cipher suites, hostname validation, and mutual TLS

Instructor Demonstration

Demonstrate symmetric and asymmetric encryption, signatures, hashes, MACs, and KDFs for a Java service hardened against credential theft, injection, insecure deserialization, token abuse, and cryptographic misuse; capture the exact configuration, code, command, transaction, query, dashboard, model, schedule, or report evidence that proves the expected result.

Hands-On Exercise

Complete a controlled Java Security Advance exercise covering key generation, storage, rotation, destruction, and secret separation and KeyStore, certificates, chains, trust stores, revocation, and PKI; introduce an exception involving TLS contexts, protocols, cipher suites, hostname validation, and mutual TLS, diagnose it from evidence, apply the smallest reversible correction, and rerun acceptance checks.

1. Confirm scope, prerequisites, identities, dependencies, data, risks, and expected outcome.
2. Perform the course-specific configuration, development, administration, analysis, or business-process workflow.
3. Capture commands, settings, records, logs, screenshots, reports, metrics, or test results.
4. Compare the observed result with acceptance criteria and document corrective or preventive action.

Scenario Analysis

• Identify the technical or business decision and the stakeholders affected by it.
• Compare security, performance, reliability, compliance, cost, usability, and support trade-offs.
• Define rollback, recovery, communication, evidence, ownership, and escalation requirements.

Troubleshooting Guidance

Diagnose issues involving symmetric and asymmetric encryption, signatures, hashes, MACs, and KDFs, key generation, storage, rotation, destruction, and secret separation, KeyStore, certificates, chains, trust stores, revocation, and PKI, TLS contexts, protocols, cipher suites, hostname validation, and mutual TLS without making an unverified production change. Separate symptoms from causes, gather time-correlated evidence, test a reversible hypothesis, validate the correction, and record recurrence controls.

Validation Checklist

• The requirement, environment, inputs, dependencies, and expected result are documented.
• The result is reproducible and supported by product-specific evidence.
• Normal, boundary, failure, security, performance, and operational conditions are reviewed.
• Exceptions, rollback, ownership, support actions, and the next improvement priority are recorded.

Lesson Outcome

Learners can apply Cryptography, Keys, Certificates, Keystores, PKI, and TLS Hardening in a realistic Java Security Advance scenario and defend the result with documented evidence.