Page 13 - Security+ (635 notes by Nikkhah)

176- The Encapsulating Security Payload (ESP) is used for authenticity, integrity, and
confidentiality to each IP packet.

177- The transport mode is used for host-to-host communications and encrypts only the

payload (the actual data or the ESP).
178- The tunnel mode is used for gateway-to-gateway communications and uses AH only.

Multipurpose Internet Mail Extensions (MIME)
179- MIME is an extension of the Simple Mail Transfer Protocol (SMTP) used for messaging.

180- Secure Mime (S/MIME) is used for secure messaging using symmetric cipher and public
keys.

181- S/MIME uses digital signatures for integrity, and a variety of encryption algorithms for
confidentiality of messages.

Pretty Good Privacy (PGP)

182- PGP is used for secure messaging by providing encryption and authentication.
183- PGP uses secret keys known to sender and receiver, which are stored in a local

computer.
184- Paraphrase is used to protect keys.

Email spam
185- Spam is unsolicited email sent to a large number of recipients.

186- These messages fill mailboxes.

187- Spam filters can be used for protection.
188- Cookies should be disabled to protect personal information from leakage.

SMTP relay, email viruses, and hoaxes

189- Email viruses can be embedded in messages.
190- Hoaxes are messages that make the receiver believe something that is not true.

191- SMTP relay is used to send unsolicited messages from a third-party server to multiple

users.
192- DNS blocking lists can be used to prevent SMTP relay.

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