Research Article
Enhancing Digital Certificate Usability in Long Lifespan IoT Devices by Utilizing Private CA
Table 3
Contents of the certificate which can be imitated.
| Field of certificates | Can be imitated/manipulated? |
| Version | Yes | Serial number | Yes | Signature algorithm | Yes | Issuer | Yes | Validity | Yes | Subject | Yes | Subject public key info | Partially (except the public key information) | X.509v3 extensions | Almost everything (except the fields that require a secret key or CA certificate information) | CT precertificate timestamp | No |
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