Adaptive Cryptographic Access Control (Advances in by Anne V. D. M. Kayem

By Anne V. D. M. Kayem

Cryptographic entry keep an eye on (CAC) is an method of securing facts by way of encrypting it with a key, in order that basically the clients in ownership of the right kind key may be able to decrypt the knowledge and/or practice additional encryptions. purposes of cryptographic entry keep an eye on will gain businesses, governments and the army the place established entry to details is essential.

The goal of this ebook is to spotlight the necessity for adaptability in cryptographic entry keep an eye on schemes which are geared for dynamic environments, equivalent to the web. Adaptive Cryptographic entry keep an eye on provides the demanding situations of designing hierarchical cryptographic key administration algorithms to enforce Adaptive entry regulate in dynamic environments and recommend options that would conquer those challenges.

Adaptive Cryptographic entry keep watch over is a state-of-the-art ebook focusing in particular in this subject in terms of safeguard and cryptographic entry regulate. either the theoretical and sensible points and techniques of cryptographic entry keep watch over are brought during this ebook. Case reviews and examples are supplied all through this book.

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Extra info for Adaptive Cryptographic Access Control (Advances in Information Security)

Example text

Since there are n classes in total in the hierarchy, each with s edges connecting it to its direct descendant classes, we need, n randomly generated class keys and a total of n − 1 subtractions of O(ρ) bit numbers from O(log M) bit numbers to obtain all the keys required. 2 summarizes the worst-case complexity costs of all the one-way function key generation algorithms that we have discussed in this section. All of these solutions handled the access control problem as though keys assigned to users were intended to be for an indeterminate period and that the only time when it was necessary to regenerate keys was when a new user joined or left the system.

3. All access rules must satisfy the separation of duty requirements. 4. All transformation procedures must be stored in an append-only log. 5. Any file that has no access control constraints must be transformed into one with one or more access control constraints before a transformation procedure is applied to it. The CLW model is therefore more of a security policy specification framework that extends the concepts in the BIBA model to the general case. The discussion in this section also illustrates that access control models are typically designed with a set goal and that the scenarios that they are designed for are assumed to be static.

So, for instance, the Chinese wall security policy could be used to specify access rules in consultancy businesses where analysts need to ensure that no conflicts of interest arise when they are dealing with different clients. Conflicts can arise when clients are direct competitors in the same market or because of ownerships of companies. Analysts therefore need to adhere to a security policy that prohibits information flows that cause a conflict of interest. The access rights in this model are designed along the lines of the BLP model but with the difference that access rights are reassigned and re-evaluated at every state transition whereas they remain static in the BLP model.

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