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"HTTPS Observatory -- concluded on 2011/02] The project collects an Internet-wide dataset of all publicly visible TLS CA certificates in order to search for CA-certified Man In The Middle (MITM) attacks against HTTPS privacy and measure the extent to which browsers really need to trust 60-200 CAs completely. Extended datasets measuring from multiple source networks (via Tor) and using SNI will also be collected." ‎- silpol