By John M. D. Hunter BA (Hons), FBCS, CEng (auth.)
Aimed basically at ultimate 12 months undergraduate classes and MSc classes on info structures, administration of knowledge platforms and layout of knowledge structures, this textbook goals to supply solutions to 5 questions;
What is safety? What are the safety difficulties specific to an IT method? What could be performed to minimize the safety hazards linked to the sort of method? In a given scenario, what are the proper safeguard countermeasures? How should still one set approximately paying for a data approach with protection implications?
It seems on the assorted ambitions businesses may have in utilising safety thoughts (availability, integrity, confidentiality, exclusivity) and which strategy is most fitted to reaching every one target. With instructions acceptable for the safety of either traditional advertisement and armed forces platforms, An details safety Handbook could be of curiosity to desktop process managers and directors in any advertisement or govt organisation.
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Additional info for An Information Security Handbook
5. 1 File Access Controls As the operating system checks and carries out all the operations on discs and tapes on behalf of all users it has full control over which user may access which file; it can even control what sort of access an individual user may have with any file. Multi-user operating systems such as VMS and Unix take advantage of this facility to allow individual users to specify, for a specific file, who may read, write to , delete and execute it. VMS divides the user population into groups so that every user is a member of one, and only one, group.
However, th e same cannot be said for the system managers, designers, programmers and administrators. 5 New Recruits and Leavers 39 The general threat posed by the technically qualified technical staff is that they can access, modify or destroy any information held by an IT system. The main counter to this threat is some form of "double manning" . The principle is that if someone commits a breach of security, it should not go unwitnessed. There is an assumption that collusion cannot be maintained unnoticed for any length of time.
VMS and Unix use almost identical systems . 4 shows the Unix mechanism in some detail. The directory entry consists only of the file name and a pointer to the I-node entry. The I-node entry is a data structure which holds all the information that the operating system has with reference to the file. The most important fields are described below. There are many other fields which are used by the operating system in the efficient administration of the file system. The mode field holds the information which determines the properties of the file.