Proactive Data Security & Engine Hardening Matrix

PROACTIVE SECURITY FRAMEWORK: 1. Encryption in Transit & Rest: Enforce TLS v1.3 with client cert verification (ssl=on, ssl_min_protocol_version='TLSv1.3'). Enforce AES-256 Transparent Data Encryption via pg_tde / LUKS. Column-level cryptographic hashing via pgcrypto. 2. Zero-Trust Access: Enforce SCRAM-SHA-256 hostssl in pg_hba.conf. Enforce Row-Level Security (RLS) policies on sensitive multi-tenant tables. 3. Audit & Intrusion Prevention: pgaudit extension capturing DDL, DML, and security privilege grants. Automated idle session kill (idle_in_transaction_session_timeout = '60s'). HARDENING COMMANDS: ALTER SYSTEM SET ssl = 'on'; ALTER SYSTEM SET ssl_min_protocol_version = 'TLSv1.3'; ALTER SYSTEM SET password_encryption = 'scram-sha-256'; CREATE POLICY tenant_isolation_policy ON telemetry_data FOR ALL TO app_role USING (tenant_id = current_setting('app.current_tenant'));

PROACTIVE SECURITY FRAMEWORK: 1. Encryption Architecture: Always Encrypted with secure enclaves to protect memory/transit. AES-256 Transparent Data Encryption (TDE) backed by Azure Key Vault / Hardware Security Module (HSM). Force TLS 1.3 transport encryption. 2. Identity & Access Governance: Enforce Entra ID (Azure AD) SSO, revoke 'sa' administrator login, enforce Dynamic Data Masking (DDM) and fine-grained Row-Level Security (RLS). 3. Audit & Threat Detection: SQL Server Audit with targeted Audit Specifications capturing SCHEMA_OBJECT_ACCESS_GROUP. Advanced Threat Protection alerting on SQL injection attempts. HARDENING COMMANDS: EXEC sp_configure 'show advanced options', 1; RECONFIGURE; EXEC sp_configure 'xp_cmdshell', 0; RECONFIGURE; CREATE DATABASE AUDIT SPECIFICATION [DB_Sec_Audit] FOR SERVER AUDIT [Server_Audit] ADD (SCHEMA_OBJECT_ACCESS_GROUP); ALTER LOGIN [sa] DISABLE;

PROACTIVE SECURITY FRAMEWORK: 1. Cryptographic Transport & Rest: Mandatory TLS v1.3 client connections (require_secure_transport = ON). InnoDB Transparent Data Encryption (TDE) utilizing keyring_file or HashiCorp Vault. 2. Identity Hardening: Enforce caching_sha2_password authentication plugin. Enforce password complexity policies, strict expiration, and dual password rotation windows. Disable remote root access. 3. Monitoring & Defense: MySQL Enterprise Audit plugin / MariaDB Audit plugin streaming JSON logs to SIEM. Slow query rate-limiting and binary log integrity checks. HARDENING COMMANDS: SET GLOBAL require_secure_transport = ON; ALTER USER 'root'@'localhost' IDENTIFIED WITH caching_sha2_password BY 'ComplexP@ss2026!'; INSTALL PLUGIN audit_log SONAME 'audit_log.so'; SET GLOBAL mandatory_roles = 'app_read_role';

PROACTIVE SECURITY FRAMEWORK: 1. Perimeter & Storage Protection: Oracle Advanced Security Transparent Data Encryption (TDE) for tablespaces and columns backed by Oracle Key Vault. Native Network Encryption (NNE) / TLS transport. 2. Privilege Containment: Oracle Database Vault prevents SYSDBA/DBA access to business schemas. Virtual Private Database (VPD) / Fine-Grained Access Control (FGAC) enforcing row predicates. 3. Auditing & Forensics: Unified Auditing enabled, logging DDL/DML execution policies directly to read-only audit trails. Oracle Audit Vault & Database Firewall real-time blocking. HARDENING COMMANDS: ADMINISTER KEY MANAGEMENT SET KEYSTORE OPEN IDENTIFIED BY "KeystorePass2026!"; CREATE AUDIT POLICY sec_audit_policy ACTIONS ALL ON sensitive_schema.financial_ledger; AUDIT POLICY sec_audit_policy BY app_user WHENEVER SUCCESSFUL;

PROACTIVE SECURITY FRAMEWORK: 1. Storage & Wire Encryption: Native DB2 Database Encryption (AES-256) leveraging PKCS#12 keystore or IBM Security Guardium Key Lifecycle Manager. SSL/TLS transport layer enforcement (SSL_SVR_KEYDB). 2. Access Control Governance: Pluggable Authentication Modules (PAM) with Kerberos/LDAP integration. Label-Based Access Control (LBAC) and Row and Column Access Control (RCAC). 3. System Audit Controls: DB2 Audit Facility (db2audit) logging AUDIT, CHECKING, OBJMAINT, SECMAINT, and SYSADMIN categories with automated log rotation. HARDENING COMMANDS: db2 update db cfg for PRODDB using ENCRYPT_DB ON; db2audit configure scope all status both error type audit; db2audit start; db2 "ALTER TABLE CUSTOMERS ACTIVATE ROW ACCESS CONTROL";

PROACTIVE SECURITY FRAMEWORK: 1. Data Protection: File-based or AWS KMS keyring plugins for InnoDB, Aria, and Temp table Data-at-Rest Encryption. Mandatory TLS certificate verification for all remote sessions. 2. Authentication Hardening: ed25519 or PAM authentication plugins. Strict RBAC role enforcement, revoking default global grants on mysql.user system tables. 3. Audit & Immutability: MariaDB Audit Plugin logging CONNECT, QUERY, QUERY_DDL, and QUERY_DML. System-Versioned Tables utilized for tamper-evident temporal audit trails. HARDENING COMMANDS: SET GLOBAL innodb_encrypt_tables = ON; SET GLOBAL innodb_encryption_threads = 4; INSTALL SONAME 'server_audit'; SET GLOBAL server_audit_logging = ON; SET GLOBAL server_audit_events = 'CONNECT,QUERY,TABLE';

PROACTIVE SECURITY FRAMEWORK: 1. Embedded Cryptography: Enforce SQLite Encryption Extension (SEE) or SQLCipher (256-bit AES-CBC mode with HMAC-SHA-512 key derivation). Storage volume encryption via OS LUKS/FileVault. 2. Sandboxing & Access Control: Enforce strict file system permissions (chmod 600). Enforce runtime container/chroot isolation to prevent privilege escalation via IPC. 3. Integrity & Query Safety: Disable untrusted extension loading. Enable query-only pragmas and cell size verification to prevent buffer overflow attacks. HARDENING COMMANDS: PRAGMA rekey = 'AES-256-Key-Passphrase-2026'; PRAGMA trusted_schema = OFF; PRAGMA cell_size_check = ON; sqlite3_db_config(db, SQLITE_DBCONFIG_DEFENSIVE, 1, NULL);

PROACTIVE SECURITY FRAMEWORK: 1. Distributed Transport & Rest TLS: Mutual TLS (mTLS) certificate enforcement for inter-node communication and client connections. Pebble engine Encryption-at-Rest (AES-256-GCM/CTR) backed by KMS. 2. Identity Federation: SAML 2.0 and OIDC integration for cluster administration. Certificate-based client authentication combined with fine-grained SQL RBAC. 3. Distributed Auditing: SQL Audit Logging configured on target tables (EXPERIMENTAL AUDIT SET READWRITE). Secure Prometheus metrics endpoint over mTLS. HARDENING COMMANDS: cockroach cert create-client app_user --certs-dir=certs --ca-key=ca.key; ALTER TABLE user_credentials EXPERIMENTAL AUDIT SET READWRITE; SET CLUSTER SETTING server.audit.log_site_admin = true;

PROACTIVE SECURITY FRAMEWORK: 1. Microservice Wire & Storage TLS: mTLS across TiDB, TiKV, and PD (Placement Driver) nodes. TiKV Encryption-at-Rest using AES256-CTR managed via HashiCorp Vault or AWS KMS. 2. Access Control: MySQL 8.0 protocol compatibility with caching_sha2_password. Granular RBAC, dynamic privilege controls, and IP subnet proxy constraints. 3. Enterprise Audit Log: TiDB Enterprise Audit Plugin capturing all SQL execution, schema modifications, and auth attempts to isolated syslog streams. HARDENING COMMANDS: [security] ssl-ca = "/path/to/ca.pem" ssl-cert = "/path/to/cert.pem" ssl-key = "/path/to/key.pem" [security.encryption] data-encryption-method = "aes256-ctr"

PROACTIVE SECURITY FRAMEWORK: 1. Cloud Storage & Transit Protection: AWS KMS AES-256 storage encryption covering storage volume, automated snapshots, and read replicas. Mandatory TLS 1.3 transport (rds.force_ssl = 1). 2. Zero-Trust Access: AWS IAM Database Authentication, automatic credential rotation via AWS Secrets Manager. AWS GuardDuty RDS Protection anomaly monitoring. 3. Activity Streaming: Advanced Auditing plugin enabled with CloudWatch Logs integration. Real-time Database Activity Streams (DAS) pushed to AWS Kinesis for SIEM processing. HARDENING COMMANDS: aws rds modify-db-cluster-parameter-group \ --db-cluster-parameter-group-name default.aurora-pg15 \ --parameters "ParameterName=rds.force_ssl,ParameterValue=1,ApplyMethod=immediate"