name: CMS
full_form: Configuration Management Server
context: a content-encryption key (CEK) and uses it to encrypt the MCPTT application plane content. The CEK is encrypted with the MCPTT server's public key. The encrypted content along with the encrypted CEK is packed to form an EnvelopedData CMS object. The message digest is computed on the EnvelopedData CMS object. The digest is digitally signed by the MCPTT client using its private key. The signature, MCPTT client's certificate chain and EnvelopedData CMS object are collected to form a SignedData CMS object. The SignedData is wrapped in a CMS ContentInfo object and inserted into the SIP message as application/pkcs7-mime media type. Figure 7.12.4-2: MCPTT Client using S/MIME to protect MCPTT application plane content The MCPTT server does the following when it receives a SIP message with the embedded S/MIME content: It computes the message digest on the encapsulated EnvelopedData object present in the SignedData object. The message digest and the MCPTT client's public key are used to verify
description: Cryptographic Message Syntax (CMS) is a protocol used for encrypting and signing messages. In this context, it's used to protect the confidentiality and integrity of information exchanged within MCPTT (Mission Critical Push-to-Talk) applications.
explanation: CMS is classified as a Protocol because its primary function is to define a standardized method for secure communication, involving encryption, digital signatures, and message digest computation.
section_title: 7.12.4 	Confidentiality and integrity protection of MCPTT application information using asymmetric keys
biotag_Context: O,O,O,O,O,O,O,O,O,O,B-Service,O,O,O,O,O,O,O,O,O,B-Service,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Protocol,O,O,O,O,O,O,O,O,O,B-Protocol,O,O,O,O,O,O,O,O,B-Service,O,O,O,O,O,O,O,B-Service,O,O,O,O,O,B-Protocol,O,O,O,O,O,O,O,B-Protocol,O,O,O,O,O,O,O,B-Protocol,O,O,O,O,O,O,B-Protocol,O,O,O,O,O,O,O,B-Service,O,O,O,O,O,B-Service,O,O,O,O,B-Service,O,O,O,O,O,O,O,O,B-Protocol,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Service,O,O,O,O,O,O,O
biotag_Description: O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Service,O,O,O,O