Replay attacks are network security attacks where the comms between a sender and receiver is intercepted.
Replay attacks are utilized to trick people in a particular transaction to do what the hacker wants. By delaying the important message needed before a transaction gets finalized, they can ask the supposed receiver or sender to give them money or access to confidential information first before they decide to let the message pass through. Hackers can also intercept communication and pretend to be the actual sender to either penetrate security and authentication protocols or deceive other network participants.
These attacks are also sometimes called man-in-the-middle (MitM) attacks because they involve hackers tapping into private and encrypted communication lines.
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