System Security

Comprehensive security architecture protecting Grade My Investments' platform, data, and users.

DEFENSE-IN-DEPTH ARCHITECTURE

rendering diagram…

flowchart TB
    subgraph NET[Network Layer]
        FD[Azure Front Door<br/>WAF]
        NSG[Network Security Groups]
        VN[Azure VNet]
    end
    subgraph APP[Application Layer]
        GO[Google OAuth<br/>Client Web]
        AD[Azure AD<br/>Admin Web]
        FK[Function Key Auth<br/>Azure Functions]
        RBAC[RBAC Enforcement]
    end
    subgraph DATA[Data Layer]
        KV[(Azure Key Vault<br/>Secrets)]
        DB[(MySQL Flexible Server<br/>AES-256 SSE)]
        TLS[TLS 1.3 in Transit]
    end
    subgraph MON[Monitoring Layer]
        AI[Application Insights]
        AZ[Azure Monitor<br/>Log Analytics]
        SENT[Azure Sentinel<br/>SIEM]
    end
    FD --> NSG --> VN --> FK
    VN --> GO
    VN --> AD
    GO --> RBAC
    AD --> RBAC
    FK --> RBAC
    RBAC --> TLS --> DB
    RBAC --> KV
    FK --> AI --> AZ --> SENT
    classDef app fill:#1f2630,stroke:#C0894E,color:#F3EFE8;
    classDef svc fill:#241c14,stroke:#E2B583,color:#F3EFE8;
    classDef data fill:#22201a,stroke:#C0894E,color:#EBD3AE;
    classDef ext fill:#1b1f27,stroke:#5A616B,color:#C4C0B8;
    classDef sec fill:#1d2733,stroke:#5cc8e0,color:#eafaff;
    class FD,NSG,VN sec
    class GO,AD,FK,RBAC app
    class KV,DB,TLS data
    class AI,AZ,SENT svc

Multi-layered security from network edge to encrypted data store.

Multi-Layered Security Architecture

Grade My Investments implements defense-in-depth security principles across all layers of the platform:

Network Security

Azure Virtual Network (VNet) Integration
Private Endpoints for database connectivity
Network Security Groups (NSGs)
Azure Front Door with WAF protection

Application Security

OAuth 2.0 / OpenID Connect authentication
Role-based access control (RBAC)
Function key authentication for Azure Functions
Input validation and sanitization

Data Security

Azure-managed AES-256 server-side encryption at rest
Encryption in transit (TLS 1.2+)
Azure MySQL Flexible Server encryption at rest (SSE)
Azure Key Vault for secrets management

Authentication & Authorization

Google OAuth (Client Web)

Features:

Single Sign-On (SSO)
Two-factor authentication support
OAuth 2.0 / OpenID Connect
Secure token-based sessions

Implementation:

JWT token validation
Automatic token refresh
Secure cookie storage
Session timeout management

Azure AD (Admin Web)

Features:

Enterprise directory integration
Multi-factor authentication (MFA)
Conditional access policies
Administrative role management

Implementation:

SAML 2.0 integration
Group-based access control
Audit logging integration
Device compliance checks

Azure Functions Security

Function Key Authentication

Each Azure Function is protected with unique function keys and host keys for different access levels:

Host Keys: Administrative access across all functions
Function Keys: Individual function access control
System Keys: Internal Azure service authentication

Network Integration

Functions are integrated into secure virtual networks:

VNet Integration: Secure communication with backend resources
Private Endpoints: Database connectivity without internet exposure
Service Endpoints: Secure access to Azure services

Monitoring & Logging

Comprehensive security monitoring and audit trails:

Application Insights: Real-time monitoring and alerting
Azure Monitor: System-level security events
Log Analytics: Centralized log aggregation and analysis

Transport Security

HTTPS/TLS 1.3

All communications encrypted in transit
Perfect Forward Secrecy (PFS)
Strong cipher suites only
HTTP Strict Transport Security (HSTS)
Certificate pinning for mobile apps

Additional Protections

Content Security Policy (CSP) headers
X-Frame-Options protection
Cross-Origin Resource Sharing (CORS) policies
Request rate limiting
DDoS protection via Azure Front Door

Security Testing & Compliance

Vulnerability Scanning

• Automated OWASP ZAP scans
• Static code analysis
• Dependency vulnerability checks
• Container image scanning

Penetration Testing

• Regular external pen tests
• Internal security assessments
• Social engineering tests
• Mobile app security testing

Compliance Standards

• SOC 2 Type II compliance
• GDPR data protection
• PCI DSS considerations
• ISO 27001 alignment

Key Management

Azure Key Vault: Centralized secrets management
Key Rotation: Automated rotation policies
Access Policies: Principle of least privilege
Audit Logs: Complete access history

Database Security

Private Endpoints: No public internet access
SSE: Azure-managed server-side encryption (AES-256)
MySQL Authentication: Strong password policies
Query Monitoring: Real-time threat detection

Security Monitoring

Real-time Alerts: Immediate threat notification
Azure Sentinel: SIEM and SOAR capabilities
Threat Intelligence: Microsoft security feeds
Security Dashboard: Centralized monitoring

Mobile Security

Biometric Auth: Face ID, Touch ID, Windows Hello
App Protection: Anti-tampering measures
Local Encryption: Secure local storage
Certificate Pinning: Man-in-the-middle protection

Security Team

Dedicated security professionals ensuring platform protection:

Security Architect
Penetration Tester
Compliance Officer
Security Analyst

24/7 Security Operations Center