Eight Bits of Trust; eMudhra's CA keys cracked in milliseconds
scotthelme.co.uk/eight-bits-of-trust-emudhras-ca-keys-cracked-in-millisecondsOne of eMudhra's certificate authority private keys is the number 4.
Not a number that starts with 4, or the number 4 followed by a few hundred random digits, just, 4... Another one is 56, and another is 115.