digital identity

Public X.509 certificates for verifying signed documents and S/MIME email.

Use the public X.509 certificates below to verify documents or S/MIME email signed by me. Download a certificate and compare its SHA-256 fingerprint with the value shown here.

Personal identity

  • Name: Santiago Casas
  • Email: s.casas@protonmail.com
  • Certificate: my_signature.crt
  • SHA-256 fingerprint: 9E:C6:18:46:CC:66:13:28:05:3F:4C:23:18:73:5E:19:EE:42:EE:D6:99:AC:C1:11:1D:46:42:1F:4A:5B:28:63

RWTH Aachen identity

  • Name: Santiago Casas
  • Email: casas@physik.rwth-aachen.de
  • Certificate: rwth_signature.crt
  • SHA-256 fingerprint: 1B:15:A3:28:C5:64:74:46:4D:21:E1:86:12:24:A5:2D:2C:07:FD:17:4F:D5:FE:A0:AD:93:3D:7F:31:21:88:6A

Verification

In your email client or document viewer, compare the certificate’s SHA-256 fingerprint with the matching value above. A matching fingerprint confirms that the certificate is the one published on this website.

These certificates are self-signed. Their validity is established by verifying the published fingerprint through this HTTPS site, not by a public certificate authority.