Data and Applications Security XVII: Status and Prospects by Sabrina De Capitani di Vimercati, Ray Indrakshi, Indrajit

By Sabrina De Capitani di Vimercati, Ray Indrakshi, Indrajit Ray

Safeguard and privateness are paramount matters in details processing structures, that are very important to company, executive and army operations and, certainly, society itself. in the meantime, the growth of the web and its convergence with telecommunication networks are offering really good connectivity, myriad purposes and, after all, new threats.

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Intuitively, we can model the integrity of data objects as the following: a data object is associated with an integrity value, which is either of two values: G or B. G means that the data object is good, and B means that the data object is corrupted.

For example, explicit congestion notification (ECN) proposed in RFC 3168, gives routers the ability to notify Remote Computer Fingerprinting for Cyber Crime Investigations 7 Figure 3. Operating system identification. sending and receiving parties of persistent network congestion using certain IP and TCP header fields [18]. ECN is now filtering its way into network OSs, and is being used by some (not all) implementations. Checking the ECN field distinguishes OSs that use it from those that do not.

When a malicious transaction is detected, ITDB can locate every transaction affected by (via damage assessment) and repair each corrupted data object without stopping the execution of new transactions on-the-fly. However, in many cases damage assessment and repair could be slower than damage spreading so the database can become even worse (in terms of integrity) during on-the-fly repair. The inability of damage assessment and repair in healing the database on-the-fly indicates the utility of multiphase damage confinement [7], which will first Delivering Services with Integrity Guarantees in Survivable Database Systems 35 quickly confine every data object that could have been corrupted as soon as a malicious transaction is identified during the confining phase, then try to unconfine the data objects that are actually not corrupted but mistakenly confined during several unconfining phases.

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