In typical Public Key Infrastructure (PKI) arrangements, a Digital Signature from a Certificate Authority (CA) attests that a particular public key certificate is valid (i.e., contains correct information). When a Self-signed Certificate is used, there is no Trust Anchor that can participate in Certificate Validation.
More Information#There might be more information for this subject on one of the following:
- Identity Certificate
- Opportunistic encryption
- Site Certificate
- Trust Anchor
- Verifying Certificate Signatures
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