Every day, 50,000 infected unique URLs of HTTPS-protected websites are detected and blocked. Scientists from the Concordia University in Montreal, Canada, have tested 14 antivirus programs offering HTTPS scanning and found that these programs create more security problems than they actually solve. There was only one exemption from this: Avast. The only issue mentioned in their study is a lack of revoked certificates checking by Avast, which has been in the market since November 2015 and is fixed in 2016 products.