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In computer network security, session fixation attacks attempt to exploit the vulnerability of a system that allows one person to fixate (find or set) another person's session identifier. Most session fixation attacks are web based, and most rely on session identifiers being accepted from URLs (query string) or POST data.
Exclusive locks cannot be obtained when a record is already locked (exclusively or shared) by another entity. If lock requests for the same entity are queued, then once a shared lock is granted, any queued shared locks may also be granted. If an exclusive lock is found next on the queue, it must wait until all shared locks have been released.
A session key is a single-use symmetric key used for encrypting all messages in one communication session.A closely related term is content encryption key (CEK), traffic encryption key (TEK), or multicast key which refers to any key used for encrypting messages, contrary to other uses like encrypting other keys (key encryption key (KEK) or key encryption has been made public key).
A lock file is often the best approach if the resource to be controlled is not a regular file at all, so using methods for locking files does not apply. For example, a lock file might govern access to a set of related resources, such as several different files, directories, a group of disk partitions, or selected access to higher level ...
The scheduler will not migrate the process or thread to another processor, and it will not schedule another process or thread to run while the current process or thread is in a critical section. Similarly, if an interrupt occurs in a critical section, the interrupt information is recorded for future processing, and execution is returned to the ...
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The receiving system first regenerates the IPEK, and then goes through a process similar to that used on the originating system to arrive at the same encrypting key that was used (the session key). The Key Serial Number (KSN) provides the information needed to do this. The cryptogram is decrypted with session key. Any further processing is done.