Data Protection in Transit
Data Protection at Rest
Data is transmitted across devices or networks
Data is stored in databases, local hard drives, or USBs
Protects the data in transit with SSL and TLS
Protects the data at rest with firewalls, antiviruses, and good security practices
You must protect the data in transit since it can become vulnerable to MITM attacks, eavesdropping, etc.
You should protect the data at rest to avoid possible data breaches even when stolen or downloaded