Modular fair exchange protocols for electronic commerce

A new dependable exchange protocol

“…Five requirements for fair exchange have been formulated by Asokan et al in [13] and further discussed in [14]. Their requirement definitions do not presume new advances in recent years.…”

“…It should be possible for the recipient of a message to identify the protocol run to which its parts belong. The protocol is described in the form of program modules (similar to Vogt et al [14]) and the notation AEeventae : AEdescriptionae to describe the steps of every module. The AEeventae can be sending a message from X to Y (denoted by X fi Y) or some local operations of a participant (denoted by his/her name, i.e., A, B, or TTP).…”

Privacy Preserving Trust Authorization Framework Using XACML

“…It is also possible for an attacker to lie by expressing constraints on credentials or services that (s)he does not possess in order to gather information from the attacked. Thus, it is important that both parties receive what they expected and none gains undue advantage [23]. Our exchange protocol uses a gradual, incremental release of information based on a finer trust policy layering that specifies the order in which policies and attributes can be disclosed.…”

Fair Payment Protocols for E-Commerce

“…Five requirements for fair exchange has formulated by Asokan et al in [4] and further discussed in [25]. But their requirement definitions haven't presumed new advances in recent years.…”

“…The protocol is described in form of program modules (similar with Vogt et al [25]) and the notation <event>:<description> to describe the steps of every module. The <event> can be sending a message from X to Y (denoted by or some local operations of a participant (denoted by his/her name, i.e.…”