in syntax of the send-message commands mentioned above should be noted.

The differences in syntax of the send-message commands mentioned above should be noted.

Authentication and privacy are obtained by using Cryptographic Message Syntax (S/MIME) or OpenPGP security body parts.

Authentication and data confidentiality are obtained by using Cryptographic Message Syntax (S/MIME) security body parts.

Since RFC 3261 was published, the S/MIME specification and the underlying Cryptographic Message Syntax (CMS, RFC 3369 [3]) have undergone some revision.

[ RFC 3565 ] Use of the Advanced Encryption Standard (AES) Encryption Algorithm in Cryptographic Message Syntax (CMS).

[11] Schaad, J., "Use of the Advanced Encryption Standard (AES) Encryption Algorithm and in Cryptographic Message Syntax (CMS)", RFC 3565, August 2003.

The Cryptographic Message Syntax (CMS), as defined in RFC 5652, can be used to Digitally Sign, Message-Digest, authenticate, or encrypt the Asymmetric Key format content type.

The Cryptographic Message Syntax (CMS), as defined in RFC 5652, can be used to digitally sign, digest, authenticate, or encrypt the asymmetric key format content type.

PKCS#7 is used to sign, encrypt, or decrypt messages under Public Key Infrastructure (PKI).

PKCS#7 is used to sign and/ or encrypt messages under a PKI.

PKCS #7 is used to sign and/or encrypt messages within a PKI (public key infrastructure).

The Cross Industry Invoice (CII) is a technical specification that can be used to create message syntax which can be exchanged globally between trading partners.

Except for the above difference in character sets, much of SIP's message and header field syntax is identical to HTTP/1.1.