Certificate Signing Request (CSR) Overview • Before you can generate your SSL Certificate, the certificate requester must create a Certificate Signing Request (CSR) for a domain name or hostname on your web server. • The CSR is a standardized way to send the issuing Certificate Authority (CA) your public key, which is paired with a secret private key on the server, and provides relevant information about the requester as indicated below Common Name (CN): • This is the Fully Qualified Domain Name (FQDN) of your server (i.e. www.google.com). This must match exactly what you type in your web browser or you may receive a security error.
Certificate Signing Request (CSR) Overview Organization Name (O): • The legal name of your company/organization (i.e. Google, Inc.). Do not abbreviate your company name and it should include the corporate identifier such as Inc., Corp, or LLC (if applicable). For DV orders, you can use your personal name Organization Unit (OU): • The unit or division of the company/organization managing the certificate (i.e. IT Department). Locality (L): • The city that you are located in (i.e. Mountain View)
Certificate Signing Request (CSR) Overview State or Province Name (ST): • The state or province in which you are located in (i.e. California) Country (C): • The country in which you are located in (i.e. United States or US) Email Address: • An email address associated with the company (i.e. email@example.com) Root Length: • The bit-length of the key pair determines the strength of the key and how easily it can be cracked using brute force methods. 2048-bit key size is the new industry standard and is used to ensure security well into the foreseeable future.
Certificate Signing Request (CSR) Overview Signature Algorithm: • Hashing algorithm are used by issuing Certificate Authorities to actually sign certificates and CRLs (Certificate Revocation List) to generate unique hash values from files. • It is highly recommended that your certificate be signed with SHA-2 as this is the strongest signature algorithm adopted by the industry. • As mentioned above, in addition to creating a CSR, the web server will also export another file called a private key. The private key is a unique cryptographic key related to the corresponding CSR and should never be shared with anyone outside your secured server environment.
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