webmail.uni-koeln.de

- Universitaet zu Koeln -

Issued by UniKoeln CA

About this certificate

This digital certificate with serial number 0c:5f:2f:86 was issued on by Universitaet zu Koeln.

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.


We have idenified some issues with this certificate:
  • KeyUsage [DigitalSignature ContentCommitment KeyEncipherment DataEncipherment] (00001111) inconsistent with ExtKeyUsage serverAuth The certificate MUST only be used for a purpose consistent with both key usage extension and extended key usage extension. (RFC 5280, Section 4.2.1.12.)
  • The keyUsage extension SHOULD be critical (RFC 5280: 4.2.1.3)

Universitaet zu Koeln

Organization: Universitaet zu Koeln
Organization unit: Zentrum fuer Angewandte Informatik
State / Province: Nordrhein-Westfalen
Locality: Koeln
Country: DE

Universitaet zu Koeln

Organization: Universitaet zu Koeln
Locality: Koeln
Country: DE

This certificate has expire since

Certificate Details

Serial Number (hex): 0c:5f:2f:86
Serial Number (int): 207564678
Serial Number lenght: 28 bits, 4 octets

SubjectKeyId: 09:94:54:70:fc:fb:87:80:7d:f9:94:a7:d0:05:90:a2:d6:3c:60:96
AuthorityKeyId: 2a:ea:89:eb:0e:b2:d0:29:c5:fe:f9:4c:a5:76:dc:b7:6f:4f:09:ba

Fingerprint (sha1): 3a:09:01:ad:34:b2:db:a9:e4:d7:86:c4:44:b5:28:d8:59:a4:e8:09
Fingerprint (sha256): 00:89:d6:92:73:63:7b:c5:97:cd:83:50:c6:9a:66:fa:4a:4a:7b:0c:e9:31:4a:86:9b:eb:c4:7d:7e:7a:59:78

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

Revocation information

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

Check the revocation status for certificate webmail.uni-koeln.de

0

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for webmail.uni-koeln.de

Public Key Algorithm

RSA

Key Size

2048

Signature Algorithm

SHA1 with RSA

Key Usage

Digital Signature
Content Commitment
Key Encipherment
Data Encipherment

Extended Key Usages

Server Authentication

Extensions

7 extensions
No unhandled critical extensions

CA Certificate

This is not a CA certificate

Subject Alternative Names

This certificate doesn't contain any subject alternative names.

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Certificate

The complete raw certificate details for webmail.uni-koeln.de in PEM and ASN.1 format.

Certificate (PEM)

-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA5Bey+CvhGNhZkUVbIx7C
Ok4bevuLtC8GEg0FU4/gozPQp4HlhCAivnTtsg4Eo0Ez5IEhZcEJIpx8iKAZjfaO
sBYMH07BQdewgjr7/S4YwO0tlUE0ChF+hHDZlBq1V1iiZrBmf3Hsj5vPKyI6q+ky
PS5hc1Cr/gx/oE6wGjjHRyzy3GKf71cSn9pPjvLuxQ1ujsKRn6+pHzqjEIaZ1wHQ
YfI7sLNEMQgZG63ZMlDMt9cHQ41t/EdX7yN8Ky9OpggrcHxMUGaG7hl10unzqVI0
wGY73YjNXrPthDHqBMTTDvCBGPHXzhUoVvYTe0Nb2VLTienjBkXIMsiSJWObRuw8
dQIDAQAB
-----END PUBLIC KEY-----

ASN.1 decoded

 [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . [c:2|t:0|true] OtherName 
 . . . . . . . . . . . . [c:0|t:2|false] INTEGER 2
 . . . . . . . . [c:0|t:2|false] INTEGER 207564678
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.113549.1.1.5 (sha1WithRSAEncryption)
 . . . . . . . . . . . . [c:0|t:5|false] NULL 
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.6 (countryName)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'DE'
 . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.7 (localityName)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'Koeln'
 . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.10 (organizationName)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'Universitaet zu Koeln'
 . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.3 (commonName)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'UniKoeln CA'
 . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.113549.1.9.1 (emailAddress)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:22|false] IA5String '[email protected]'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2008-05-30 07:51:18 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2013-05-29 07:51:18 +0000 UTC
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.6 (countryName)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'DE'
 . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.8 (stateOrProvinceName)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'Nordrhein-Westfalen'
 . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.7 (localityName)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'Koeln'
 . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.10 (organizationName)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'Universitaet zu Koeln'
 . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.11 (organizationalUnitName)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'Zentrum fuer Angewandte Informatik'
 . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.3 (commonName)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'webmail.uni-koeln.de'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.113549.1.1.1 (rsaEncryption)
 . . . . . . . . . . . . . . . . [c:0|t:5|false] NULL 
 . . . . . . . . . . . . [c:0|t:3|false] BIT STRING (2160 bits)
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 28794019993684160112519097001430521675329939779364416490063042417168904839518464815914408108317248438922022214612848358715900050572765496729693518719115918737358592881415937681864512297003319116870404768227285385670069007040849786227380883707920318319453617458781016864659566081419393075780309214432088552877163664226215386348061190560295830752640547274226978377601749236348781827550979219201375226771273704695076740803127151853990316088868406528972981921426187498646563978840674569056848852472537951322560456616345627950221060961199121345132022852184505957874053632808952975876220363712640035693355442809227646352501
 . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 65537

 . . . . . . . . [c:2|t:3|true] ORAddress 
 . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.19 (basicConstraints)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (2 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.15 (keyUsage)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (4 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:3|false] BIT STRING (4 bits)
							04f0
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.37 (extKeyUsage)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (12 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.3.1 (serverAuth)
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.14 (subjectKeyIdentifier)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (22 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (20 bytes)
							09945470fcfb87807df994a7d00590a2d63c6096
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.35 (authorityKeyIdentifier)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (24 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|false] OtherName 2aea89eb0eb2d029c5fef94ca576dcb76f4f09ba
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.31 (cRLDistributionPoints)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (124 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|true] OtherName 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|true] OtherName 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://cdp1.pca.dfn.de/uni-koeln-ca/pub/crl/cacrl.crl'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|true] OtherName 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|true] OtherName 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://cdp2.pca.dfn.de/uni-koeln-ca/pub/crl/cacrl.crl'
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.1.1 (authorityInfoAccess)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (145 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.48.2 (caIssuers)
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://cdp1.pca.dfn.de/uni-koeln-ca/pub/cacert/cacert.crt'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.48.2 (caIssuers)
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://cdp2.pca.dfn.de/uni-koeln-ca/pub/cacert/cacert.crt'
 . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.113549.1.1.5 (sha1WithRSAEncryption)
 . . . . . . . . [c:0|t:5|false] NULL 
 . . . . [c:0|t:3|false] BIT STRING (2048 bits)
		003484c0a2d0a12d837a65e58072294596b6e5b9d6cfbd6238db5f4db0dca051778b61245e01792015e625e3b5400864411d5e0d681b7e673ac21728e2bbddb7c17729dc6cf5b76da9b22d207c0fc4720096f041a44d11853decd47776931cbf30eb2271470ad95fb3e1488573d11d9ff8bab41857592aa0a310cd2c42f7a01ce5ed76d4e91d390966a0807a509e5648c851896fa0fc6c26ab4cdd138dd8b095a2881f87eecc3f0f59da9215fdf3dd5bb9382a8df846d8ee7ce594d03d2ee4892bd1b48393ed761af53c67cd578646197c649db8d0cc39300c9ef8fa8437218d1e6db5164d344f552a74d56d62dfbccb4932ff74588b68023053ef5a6ae93b1b44