A team of researchers from MIT has developed a novel method of tracking COVID-19 transmission among the population, using Bluetooth \u201cchirps\u201d that could automatically trace COVID-positive contacts and warn those who have potentially become infected, without violating their privacy.\nThe system is called PACT, or Private Automated Contact Tracing. It works by sending random strings of numbers via low-power Bluetooth from a user\u2019s smartphone to other nearby devices using the system, creating a coded list of smartphones that a given user has been close to in the past 14 days.\nIf the user subsequently tests positive for COVID, he or she can upload that list of \u201cchirps\u201d to the database, so that other users can run a check to determine whether they might have exposed.\nMIT said that the system uses advanced privacy protection methods to ensure the privacy of both COVID sufferers and those checking to see whether they\u2019ve been exposed. People would need to opt in, and researchers specifically highlighted that PACT does not use any GPS, wireless location or phone ID information.\n\u201cFor these broadcasts, we\u2019re using cryptographic techniques to generate random, rotating numbers that are not just anonymous, but pseudonymous, constantly changing their \u2018ID,\u2019 and that can\u2019t be traced back to an individual,\u201d said MIT institute professor Ron Rivest, who led the project. (Rivest knows a\u00a0 thing or two about cryptography: he\u2019s the R in RSA, the first publicly available public-key cryptosystem.)\nThe idea behind PACT is to make sure that the system isn\u2019t tracking any individuals specifically. Rather, it\u2019s meant to be a yes\/no resource for those wondering whether they may have been in proximity to someone with COVID. It\u2019s currently at the proof-of-concept stage \u2013 the team recently overcame the hurdle of getting Androids and iPhones to speak to each other \u2013 and overtures have been made to smartphone makers, Apple, Google and Microsoft to try and get the system into the public\u2019s hands as quickly as possible.\n\u201cThe aim of the prototype is to prove to these developers that this is feasible for them to implement,\u201d said Rivest.\nThe team hopes that if PACT comes into widespread use it would enable a much more selective approach to quarantine and give communities the ability to return to normalcy more quickly. Tracking the spread of a disease like COVID with more speed and precision could let public health authorities suggest testing to specific groups of people if they notice a pattern emerging.\nMIT also said that the team has demonstrated PACT to various government agencies, and coordinating similar efforts elsewhere in the U.S., as well as in Europe.