Hijacking
Hijacking is known as a type of network security attack where the attacker takes control the communication between two entities while masquerading as one of them. In one type of hijacking the perpetrator takes control of an established connection while it is in progress. The attacker uses a program that appears to be the server to the client and appears to be the client to the server. This type of attack may be used to gain access to the messages, or to enable the attacker to modify them before retransmitting them.
Browser hijacking is another form of hijacking, in which a user is taken to a different site than the one the user requested. There are two different types of domain name system (DNS) hijacking.
In one, the attacker gains access to DNS records on a server and modifies them so that requests for the genuine Web page will be redirected elsewhere - usually to a fake page that the attacker has created. This gives the impression to the viewer that the Web site has been compromised; when in fact, only the server has been.
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