Methods and apparatus for denial of service resistant policing of packets
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United States of America Patent
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-
Nov 8, 2016
Grant Date -
Dec 24, 2015
app pub date -
Sep 1, 2015
filing date -
Feb 12, 2014
priority date (Note) -
In Force
status (Latency Note)
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Abstract
Methods and apparatus for supporting secure packet communications, e.g., sRTP/sRTCP, which are resistant to denial of service attacks are described. A received packet is identified to correspond to a particular stream being received, the stream having a current expected set of packet sequence numbers, e.g., a current window including a next expected packet sequence number and at least one packet sequence number in the expected packet window on each side of the expected packet sequence number. Unencrypted information from the received packet, e.g., a received packet sequence number, is used to determine at least one of: to drop the received packet, or to assign the packet to one of a plurality of policing levels. If the packet passes policing at its assigned policing level, the packet may undergo authentication and decryption to determine if it is a valid packet.
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