Other Issues
Cost Self-signed certificates can be created for free using a wide variety of tools including Java's keytool, Adobe Reader, and Apple's Keychain. Certificates bought from major CAs range from tens to thousands of dollars per year.
Speed to Deploy Self-signed certificates require the two parties to interact (e.g. to securely trade public keys). Using a CA requires only the CA and the certificate holder to interact; the holder of the public key can validate its authenticity with the CA's root certificate.
Customization Self-signed certificates are easier to customize, for example a larger key size, contained data, metadata, etc.
Read more about this topic: Self-signed Certificate
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