Methods, systems, and computer readable media for testing a network system under test communicating over a secure channel

A system for testing a system under test (SUT), the system comprising:

• one or more processors and memory storing instructions for the one or more processors;
• and
• one or more networking circuits configured, by the one or more processors, for performing operations comprising:
• sending a first test packet to the SUT over a communication link, wherein the first test packet is associated with a layer 2 secure channel that is bound to an emulated network device;
• receiving a second test packet from the SUT over the communication link, wherein the second test packet includes an unencrypted portion and an encrypted portion;
• forming a test identifier that uniquely identifies the layer 2 secure channel and the emulated network device using a subset of bits from the unencrypted portion of the second test packet, wherein forming the test identifier comprises forming a portion of the test identifier as a device identifier from the unencrypted portion of the second test packet such that the device identifier uniquely identifies the emulated network device from a plurality of other emulated network devices, and wherein forming the portion of the test identifier as the device identifier comprises using both a destination media access control (MAC) address and virtual local area network (ULAN) identifier;
• and
• decrypting the encrypted portion of the second test packet by finding a security key using the test identifier, wherein decrypting the encrypted portion of the second test packet by finding a security key using the test identifier comprises using the test identifier, including the device identifier that uniquely identifies the emulated network device, as an index to a key table.