Which property of information security does encryption support?

Encryption primarily supports the property of confidentiality in information security. Confidentiality refers to the protection of information from unauthorized access and disclosure. By using encryption, data is transformed into a format that is unreadable to anyone who does not possess the appropriate decryption key. This ensures that sensitive information, such as personal data or proprietary business information, remains secure and only accessible to authorized individuals.

While other properties like integrity involve ensuring that data has not been altered or tampered with, and availability focuses on ensuring that information is accessible when needed, encryption's main role is to safeguard the secrecy of information. Therefore, in the context of information security, encryption is fundamentally aimed at preserving the confidentiality of the data.