Abstract
Data integrity is a property that implies that data have not been altered or destroyed in an unauthorized manner. The placement of such data security services in the emerging open systems interconnection (OSI) seven-layer reference model architecture is presented in this paper. The actual placement of various security services in the OSI architecture is itself a controversial issue. In this paper, we have considered various data integrity services and mechanisms and presented some factors for the selection of suitable layers for the placement of data integrity security services. Also, we have presented considerations for selecting those layers to provide data integrity of all user data on a connection-oriented transmission with and without error recovery; data integrity of selected fields within the user data on a connection without error recovery; data integrity of all user data, and data integrity of selected fields within the user data on a connectionless transmission.
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