Issued by Uni-Siegen CA - G02

About this certificate

This digital certificate with serial number 0f:ab:45:8e was issued on by Universitaet Siegen .

This certificate has already expired and will cause a warning or error message in the browser it's still listed on this site to allow you to look back on previously issued certificates. If we have found any compliance issues with this certificate they will be shown below. I hope this certificate review is providing you the detailed information in a simple form you where looking for.

Cerificate errors/warnings *beta

  • ERROR: KeyUsage extension SHOULD be marked as critical when present
  • ERROR: Certificate doesn't contain any subjectAltName
  • ERROR: Certificate CN is not listed in subjectAltName

Universitaet Siegen

Organization: Universitaet Siegen
Organization unit: ZIMT
State / Province: Nordrhein-Westfalen
Locality: Siegen
Country: DE

Universitaet Siegen

Organization: Universitaet Siegen
Organization unit: Zentrum fuer Informations- und Medientechnologie
State / Province: Nordrhein-Westfalen
Locality: Siegen
Country: DE

Time since certificate expired

This certificate has expire since

Certificate Details

Serial Number (hex): 0f:ab:45:8e
Serial Number (int): 262882702
Serial Number lenght: 28 bits, 4 octets

SubjectKeyId: 4c:9d:38:20:5f:6e:c7:bc:ab:99:a5:53:aa:1b:5a:4c:32:35:45:3f
AuthorityKeyId: ff:74:c2:69:3a:f0:84:9f:9c:02:93:cd:9f:9e:f7:dd:ff:01:c5:65

Fingerprint (sha1): c0:f3:12:ae:86:c9:98:36:97:9d:49:0c:88:c4:9b:2a:68:ec:e9:68
Fingerprint (sha256): ff:64:8e:92:ca:ea:63:8c:83:e6:1f:f3:fc:1b:8a:46:3f:19:e4:08:bf:0f:af:2d:61:7d:b6:a9:8d:d0:df:3b

Issuing Certificate URL: http://cdp1.pca.dfn.de/uni-siegen-ca/pub/cacert/g_cacert.crt
Issuing Certificate URL: http://cdp2.pca.dfn.de/uni-siegen-ca/pub/cacert/g_cacert.crt

Revocation information

CRL Distribution Point: http://cdp1.pca.dfn.de/uni-siegen-ca/pub/crl/g_cacrl.crl
CRL Distribution Point: http://cdp2.pca.dfn.de/uni-siegen-ca/pub/crl/g_cacrl.crl

Check the revocation status for the current certificate on www.myalumni.uni-siegen.de
DNS Names
Email Addresses
IP Addresses

Advanced Certificate Properties

Technical details about this certificate

Public Key Algorithm


Key Size


Signature Algorithm

SHA1 with RSA

Key Usage

Digital Signature
Content Commitment
Key Encipherment
Data Encipherment

Extended Key Usages

Server Authentication


8 extensions
No unhandled critical extensions

CA Certificate

This is not a CA certificate

Subject Alternative Names