A system and method for capturing non-forgeable packet traces. Upon start-up of a sniffer, a first quote of Platform Configuration Register (PCR) values in a Trusted Platform Module (TPM) utilized by the sniffer is obtained, wherein the first quote comprises a list of starting values in the PCRs and is signed by the TPM and stored in a packet log. When a packet of interest is intercepted by the sniffer, the sniffer obtains a hash of the packet and instructs the TPM to extend a PCR with the hash value. The packet of interest is then stored in the packet log. When the sniffer is shutdown, a second quote of values in the PCRs is obtained, wherein the second quote comprises a list of current values in the PCRs, and wherein the second quote is signed by the TPM and stored in the packet log.