Authentication exchange

Exchange type defines the number of messages in an ISAKMP exchange and the ordering of the used payload types for each of these messages. Through this arrangement of messages and payloads, security services are provided by the exchange type.
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A key exchange algorithm useful in situations in which two parties might need to communicate with each other but they have no physical means to exchange key material and there is no public key infrastructure in place to facilitate the exchange of secret keys.
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A small version of the phone company’s central switching office. Also known as a private automatic branch exchange. A central telecommunications switching station that an organization uses for its own purposes. A sophisticated telephone system often used by organizations to provide inbound call support, extension-to-extension calling, conference calling, and voicemail. This can be implemented as a stand-alone phone system network or integrated with the IT infrastructure.
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A hidden software or hardware mechanism that permits system protection mechanisms to be circumvented. It is activated in some nonapparent manner; for example, a special “random” key sequence at a terminal. Synonymous with back door. Undocumented command sequence that allows software developers to bypass normal access restrictions.
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Similar to hash total checking, but instead of verifying content integrity, it involves verifying packet or message sequence integrity.
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