The U.S. National Security Agency (NSA) is warning of the dangers stemming from the use of broadly-scoped certificates to authenticate multiple servers in an organization. These include a recently...
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NSA released the Cybersecurity Information Sheet, “Avoid Dangers of Wildcard TLS Certificates and the ALPACA Technique” today, warning network administrators about the risks of using poorly scoped...
Security researcher Moxie Marlinspike created what he called a universal wildcard certificate that in many ways resembles certificate authority certificates that VeriSign and other...
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A wildcard certificate is a digital certificate that is applied to a domain and all its subdomains.
Generate a cryptographic keypair (private + public key) · Generate a 'certificate' from that (containing the public key + some metadata, such as your hostname and when the certificate will expire) · Send the certificate to a Certificate Authority (like Let's Encrypt), who will then validate the metadata - this is where it's ensured that you actually own the hostname you've created a certificate for, as the CA will check this. Receive a signed certificate - the original certificate, plus a cr...
In this tutorial you will create a Let’s Encrypt wildcard certificate. Wildcard certificates are SSL certificates that can secure any number of subdomains wi…