Security and Compliance

CloudSync is built from the ground up with security and compliance as first-class requirements. All components follow industry best practices for data protection.

## Encryption Standards

### Transport Layer Security
All data transmitted between clients and CloudSync servers uses TLS 1.3 with Perfect Forward Secrecy (PFS). This ensures that even if a TLS certificate is compromised in the future, past communications remain secure.

### Data at Rest Encryption
Files stored in CloudSync datacenters are encrypted using AES-256-GCM. Each workspace uses unique encryption keys that are stored separately from the encrypted data using a hardware security module (HSM).

### End-User Key Management
Customers can optionally manage their own encryption keys (Bring Your Own Key - BYOK) using AWS KMS or Azure Key Vault. CloudSync has zero knowledge of customer encryption keys in this configuration.

## Access Control

### Role-Based Access Control
CloudSync supports fine-grained RBAC with predefined roles:
- Owner: Full access, can manage billing and team members
- Admin: Can configure sync rules, invite members, view audit logs
- Member: Can sync files and view shared content
- Viewer: Read-only access to specific folders

### Multi-Factor Authentication
MFA using TOTP (Time-based One-Time Password) is strongly recommended and can be enforced at the workspace level. Hardware security keys (FIDO2) are supported for high-security environments.

### Audit Logging
All administrative actions are logged with timestamp, user ID, action type, and result. Audit logs are immutable and retained for 2 years. Logs can be exported in JSON or CSV format for compliance analysis.

## Compliance Certifications

CloudSync meets the following compliance requirements:

- **SOC 2 Type II**: Audited annually by independent third-party auditors
- **ISO 27001**: Information security management system certification
- **HIPAA**: Compliant for healthcare data (PHI - Protected Health Information)
- **GDPR**: Full GDPR compliance including data residency options
- **CCPA**: California Consumer Privacy Act compliance for California residents
- **FedRAMP**: Moderate baseline authorization for US government use

## Data Residency

CloudSync allows you to specify where your data is stored geographically. Available regions include North America, Europe, Asia Pacific, and the Middle East. Data never leaves the selected region without explicit customer authorization.

## Disaster Recovery

### Redundancy
Data is replicated across at least 3 geographically separate datacenters within each region. Each datacenter has independent power, cooling, and network infrastructure.

### Recovery Time Objective (RTO)
In the event of a major datacenter failure, recovery time is less than 1 hour for 99% of workspaces. Critical systems have sub-5-minute RTO.

### Recovery Point Objective (RPO)
All data is continuously replicated across datacenters with a maximum RPO of 5 minutes. This means you'll never lose more than 5 minutes of changes.

### Backup Frequency
In addition to geographic replication, full backups are taken every 24 hours. Backups are tested monthly to ensure they can be successfully restored.

## Vulnerability Management

### Security Scanning
All CloudSync code is continuously scanned using SAST (Static Application Security Testing) tools. Third-party security audits are conducted quarterly.

### Bug Bounty Program
CloudSync maintains an active bug bounty program with a top payout of $50,000 for critical vulnerabilities. Researchers can report security issues to security@cloudsync.io.

### Incident Response
In the event of a security incident, CloudSync notifies affected customers within 24 hours. We maintain a detailed incident response plan tested quarterly.

## Shared Responsibility Model

CloudSync is responsible for:
- Infrastructure security
- Encryption and key management
- Physical datacenter security
- Network and firewall configuration
- Regular security audits and patching

Customers are responsible for:
- Access control and credential management
- Monitoring workspace activities
- Configuring appropriate sync policies
- Reporting security concerns
