Happy birthday to Let’s Encrypt !

Huge thanks to everyone involved in making HTTPS available to everyone for free !

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2 points

Having a certificate for any subdomain has implications for other sibling domains, even without a wildcard certificate.

By default, web browsers are a lot less strict about Same Origin Policy for sibling domains, which enables a lot of web-based attacks (like CSRF and cookie stealing) if your able to hijack any subdomain

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