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Echo (communications protocol)
Echo (one-to-all, one-to-one, or one-to-some distribution) is a group communications protocol where authenticated and encrypted information is addressed to members connected to a node. Several clients such as Spot-On, BitMail, GoldBug, and FireFloo support this protocol.
Adaptive Echo, Full Echo, and Half Echo can be chosen as several modes of the encrypted Echo protocol.
The Echo protocol offers three modes of operation: Adaptive Echo, Full Echo, and Half Echo.
== Adaptive Echo ==
The Adaptive Echo distributes messages to parties that have shown awareness of a secret token. The graphic at the side shows the communication example of Hansel and Gretel. Referring to the old fairy tale, both highlight the trees with either "white pebbles" or "bread crumbs" to discover each other in the forest. They wish to communicate without the wicked witch knowing. How can Hansel and Gretel communicate without revealing their communications? The nodes in this example use token "white pebbles". Because the wicked witch is unaware of the secret token, she will not receive communications from Hansel and Gretel unless, of course, she misbehaves.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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