17.2 THREATS TO NETWORK TRANSACTIONS
A transaction from the originator User_ID[A] to the recipient User_ID[B] involves the transmission of DATA, committing the users to some course of action. The participants require protection against a variety of harmful acts including:
Reneging: The originator subsequently disowns a transaction.
Forgery: The recipient fabricates a transaction.
Alteration: The recipient alters a previous valid transaction.
Masquerading: A user attempts to masquerade as another.
These actions are often indistinguishable; for example, User_ID[A] might attempt to renege on a transaction with User_ID[B] by claiming that
- User_ID[B] has altered transaction data or
- A third party, User_ID[C], has been masquerading as the originator.
Protocols have to be defined that at least detect attempts at alteration and to identify the source of Internet transactions.
Get Computer Security and Cryptography now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
