Packet Replay

Definitions

1. The retransmission of previously captured packets or messages in order to repeat, confuse, or bypass a protocol exchange. Packet replay is effective when the protocol does not properly enforce freshness, sequence checks, or nonce validation.

   In plain English: Re-sending old network traffic to trick a system into repeating an action.

   Example: "The badge system failed because a packet replay of the unlock command worked even after the original user had left."

Related Terms

• packet
• Communication Protocol
• Connection Manager
• Connection String
• Handshake
• Transport
• Media Access Control
• Multi-Hop
• Protocol Vulnerability
• Replay Prevention