Encryption in Transit

Encryption in transit protects data as it moves between systems, networks, or devices, typically using TLS/SSL protocols to prevent interception.

Encryption in transit protects data while it's being transmitted over networks. This prevents eavesdropping, man-in-the-middle attacks, and data tampering.

Primary protocols include: - TLS 1.3/1.2: Current standard for HTTPS and secure communications - SSH: Secure Shell for remote administration - VPN: Encrypted tunnels for network traffic - IPsec: Network protocol suite for securing IP communications

Key implementation considerations: - Certificate Management: Using valid, trusted SSL certificates - Protocol Versions: Disable outdated protocols (SSL 3.0, TLS 1.0/1.1) - Cipher Suites: Use strong, modern ciphers - Certificate Pinning: Prevent certificate substitution attacks

Encryption in transit should be enforced everywhere—external and internal communications alike.

Why It Matters

Data in transit is vulnerable to interception, man-in-the-middle attacks, and tampering. Without TLS encryption, sensitive data including credentials, personal information, and financial data can be captured by attackers on the same network. Zero trust architectures require encrypting all traffic—including internal communications—and compliance frameworks mandate TLS 1.2+ for all data transmission.

Key Points

TLS 1.2+ is the current minimum standard

TLS 1.0 and 1.1 should be disabled

Applies to all network communication, not just HTTPS

Must be combined with encryption at rest

Certificate management is critical

Applicable Compliance Frameworks

SOC 2 ISO 27001 HIPAA PCI DSS GDPR

Related Terms

Encryption at Rest

Encryption at rest protects data stored on disks, databases, or storage systems by converting it to an unreadable format that requires a key to decrypt.