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The GNSS signal received power lies below the thermal noise and a correlation with the known spreading sequence is needed in order to recover it. The use of GNSS for tracking vehicles or goods has incentivized the malicious use of personal privacy devices (PPD) or jammers in order to disrupt the service. Usually jammers achieve denial of service (DoS) by the transmission of high power interfering signals, making it difficult for the victim receiver to correctly track the genuine signal. The approach of a traditional jamming attack can be seen as brute-force: it disrupts the service over a certain area rather than selectively targeting a particular device or signal. This work will examine a new class of low power GNSS jammers, that target each ranging signal individually and aim at disrupting the PNT capability for a specific receiver, by directly attacking its correlation process. Instead of overwhelming the legitimate …