Exam 22: Internet Security Protocols and Standards

Recipients without S/MIME capability can view the message content, although they cannot verify the signature.

Transport mode provides protection primarily for lower-layer protocols.

A _________ is formed by taking the message digest of the content to be signed and then encrypting that with the private key of the signer.

_________ is a specification for cryptographically signing e-mail messages,permitting a signing domain to claim responsibility for a message in the mail stream.

In the case of ________ only the digital signature is encoded using base64.

DKIM has been widely adopted by a range of e-mail providers and many Internet service providers.

________ is a security enhancement to the MIME Internet e-mail format standard,based on technology from RSA Data Security.

S/MIME content-types support four new functions: enveloped data,__________,clear-signed data,and signed and enveloped data.

A signed data message can only be viewed by a recipient with __________ capability.

The default algorithms used for signing S/MIME messages are SHA-1 and the _________.

_______ is a list that contains the combinations of cryptographic algorithms supported by the client.

A message store cannot be located on the same machine as the MUA.

The _______ is a directory lookup service that provides a mapping between the name of a host on the Internet and its numerical address.

ESP supports two modes of use: transport and _________.

The default algorithms used for encrypting S/MIME messages are the triple DES and a public-key scheme known as _______.

The result of S/MIME encrypting the digest using DSS and the sender's private DSS key is the ________.

_____ defines a number of content formats,which standardize representations for the support of multimedia e-mail.

IPsec can assure that _________.

SMTP is used between the message user agent and the mail submission agent.

If encryption is used alone,_______ is used to convert the ciphertext to ASCII format.