ITPEC IP October 2020 Question 40
ITPEC IP October 2020 — Question 40 of 100
A digital signature allows the recipient to verify that an email's signed content has not been altered. The sender signs a digest with a private key, and verification with the corresponding public key detects changes while also supporting sender authenticity.
Answer (d)
Why not others:
- IMAP retrieves and manages mail stored on a server
- SMTP transfers outgoing email between clients and servers or among servers
- an information security policy states organizational rules but does not cryptographically verify a particular message
Key rule: Digital signatures provide integrity and authenticity; encryption is used when message confidentiality is also required.
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