A digital signature by itself conceals the contents of the signed document.
Answer
false
Explanation
### Why this is right
A signature provides evidence about who signed and whether the signed data has changed. It does not encrypt the document, so the content remains readable unless a separate encryption step is used.
### The concept
Digital signatures commonly use a hash of the document and the signer’s private key. A recipient uses the corresponding public key to verify the signature and checks that the document’s contents still correspond to the signed hash. This supports authenticity and integrity, not confidentiality. Signing and encryption solve different problems and may be used together.
### The other options
- **True. A digital signature by itself conceals the contents of the signed document.**: This confuses signing with encryption. A signature does not hide plaintext.
### Terms
- **Digital signature**: A cryptographic value used to check the origin and integrity of data.
- **Hash**: A one-way fingerprint calculated from data.
- **Confidentiality**: Protection against unauthorized reading.
### Remember
A signature proves and detects; encryption conceals.
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