Download Computer-Related Risks by Peter G. Neumann PDF

By Peter G. Neumann

In line with information collected through the writer as a part of ACM's foreign dangers discussion board, this publication includes debts of mishaps attributed to pcs and the folk utilizing them--some funny, and a few tragic. Neumann characterizes other kinds of computer-related dangers, discusses possibility factors and results, and considers their implications. He additionally indicates how you can reduce dangers sooner or later.

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Sample text

The readACL and writeACL variables are lists of directories and files that applets are allowed to read and write. The initACL variable tracks whether the ACLs have been ini29 tialized. The networkMode variable determines what hosts applets are allowed to make network connections to. By setting the networkMode variable to allow connections anywhere, the ACLs to null, and the initACL variable to true, we effectively circumvent all JDK security. Java’s SecurityManagers generally base their access control decisions on whether they are being called in the dynamic scope of code loaded from the network.

In general, this relation will not be symmetric.

GetSecurityManager(), which may provide a small performance improvement, but with a security penalty for not enforcing the programmer’s declared abstractions. , bytecode that successfully verifies) that do not correspond to valid Java programs. Some examples: 1. The bytecode language has an intra-method G OTO statement, so arbitrary control-flow graphs may be formed. The Java language can produce only reducible flow graphs. 2. The bytecode language allows access to the exception value in an exception handler that catches any exception, whereas Java’s finally block does not.

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