Your organization audited an essential application and found it isn’t securely storing data.

Comprehensive and Detailed In-Depth Explanation:

The Transit secrets engine encrypts data without local key storage. The Vault documentation states:

"The Transit secrets engine allows you to send cleartext data to Vault to be encrypted. Vault will encrypt the data with the referenced encryption key, which is stored locally, and returns the ciphertext to the application. Although the encryption keys in the Transit secrets engine are exportable, they are generally kept in Vault."

—Transit Tutorial

C: Correct. Meets encryption and key security needs:

"It allows applications to encrypt data before storing it in a backend database and decrypt it when needed, without storing encryption keys locally."

—Vault Secrets: Transit

A: PKI is for certificates.

B: SSH is for SSH credentials.

D: Cubbyhole is for temporary storage.