Backup Security Basics
Trusting a third party with a copy of your data understandably raises security questions. Here's the general concepts worth knowing.
Encryption in transit
Reputable backup services generally encrypt your data while it's being uploaded, so it isn't exposed as plain text over the network.
Encryption at rest
Data is also typically encrypted while stored on the provider's servers, protecting it if the storage itself were ever compromised.
Zero-knowledge / private key options
Some services offer a "private key" or "zero-knowledge" encryption option, meaning only you hold the key needed to decrypt your data — but this also means the provider generally can't help recover your data if you lose that key.
Account security still matters
Strong, unique passwords and enabling any available two-factor authentication on your backup account are just as important as the provider's own encryption.
This is general educational information about how backup security concepts tend to work, not a security audit of any specific provider. Review a provider's own security documentation for authoritative, current details.