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Self-Signed Certificate

A Self-Signed Certificate is a Digital Certificate that is signed by the same entity whose identity it certifies, rather than by a third-party Certificate Authority (CA).^[600-developer__tools__security__openssl.md]

Functionality and Purpose

In this arrangement, the entity acts as its own CA.^[600-developer__tools__security__openssl.md] This process typically involves generating a private key and then using that key to create a certificate that acts as a digital identity for the owner.^[600-developer__tools__security__certificate.md]

The primary purpose of a self-signed certificate is to facilitate encrypted communication (e.g., HTTPS/TLS) without the cost or validation requirements of a commercial CA.^[600-developer__tools__security__openssl.md]

Trust and Verification

Because the certificate is not signed by a trusted, external third party, operating systems and browsers do not automatically trust Self-signed certificates.^[600-developer__tools__security__openssl.md] To prevent security warnings, the user must manually import the certificate into the "Trusted Root Certification Authorities" store on their system or browser.^[600-developer__tools__security__openssl.md]

Usage

Self-signed certificates are commonly generated using command-line tools like OpenSSL to create Digital signatures and establish secure environments for testing and development.^[600-developer__tools__security__openssl.md]

  • [[Certificate Authority]]
  • [[Public Key Infrastructure]]
  • OpenSSL

Sources

  • 600-developer__tools__security__certificate.md
  • 600-developer__tools__security__openssl.md