arachne.uni-koeln.de
Issued by R3
About this certificate
This digital certificate with serial number 03:b1:8a:f6:15:66:0d:7b:c3:03:f3:6c:12:b3:c0:ff:8c:f1 was issued on by Let's Encrypt.
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:
- DV certificate contains a subject common name, this is not recommended. If certificate policy 2.23.140.1.2.1 (CA/B BR domain validated) is included, only country and/or common name is allowed in SubjectDN. (BRs: 7.1.2.7.2)
- Subscriber certificates use of Subject Key Identifier is NOT RECOMMENDED (BRs v2: 7.1.2.7.6)
- Subscriber Certificate: commonName is NOT RECOMMENDED. (BRs: 7.1.2.7.1)
Certificate Subject
CN=arachne.uni-koeln.de
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 03:b1:8a:f6:15:66:0d:7b:c3:03:f3:6c:12:b3:c0:ff:8c:f1Serial Number (int): 321751547942748413108024224129166199459057
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: 6d:6a:eb:08:ed:1a:f5:75:52:bb:c3:93:2c:5e:64:b4:5c:78:f8:b2
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6
Fingerprint (sha1): 6f:15:95:ac:87:f5:51:72:e9:35:45:d0:41:f1:ea:97:6e:b2:ab:fd
Fingerprint (sha256): 00:03:d5:a6:ce:51:c8:e0:4b:6e:c6:de:1f:b0:76:d8:ab:66:0c:57:db:d0:f0:c0:29:97:90:8d:6d:91:d5:5c
Issuing Certificate URL: http://r3.i.lencr.org/
Revocation information
OCSP Server: http://r3.o.lencr.orgCheck the revocation status for certificate arachne.uni-koeln.de
1
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for arachne.uni-koeln.de
Public Key Algorithm
RSA
Key Size
4096
Signature Algorithm
SHA256 with RSA
Key Usage
Digital Signature
Key Encipherment
Extended Key Usages
Server Authentication
Client Authentication
Extensions
9 extensions
No
unhandled critical extensions
CA Certificate
This is not a CA certificate
Subject Alternative Names
arachne.uni-koeln.de
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Certificate
The complete raw certificate details for arachne.uni-koeln.de in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIF9TCCBN2gAwIBAgISA7GK9hVmDXvDA/NsErPA/4zxMA0GCSqGSIb3DQEBCwUA MDIxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MQswCQYDVQQD EwJSMzAeFw0yNDAxMTgwOTI5MTZaFw0yNDA0MTcwOTI5MTVaMB8xHTAbBgNVBAMT FGFyYWNobmUudW5pLWtvZWxuLmRlMIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIIC CgKCAgEAnVt+agoyy9twwo/mlAq/0srBf7VDaYC1JwRxvbmoEWFa2ItPNipqV7kU jBWtrhIIf3DnqlOl73rE9m7UaDGSqzKdnSilyQ7b4/622UBktRoB6D1qNTNWmIpm a6VzLS18Us/CA4rzMdLU2cAPp4RePid0lCuGGPm7OWjS0rgtYN3GJWcFtlYNJymi YX+Bp39gaSVJBLdxl7FCU5TumKC9m+B22WpCL71kKVUVST63YpNpEQYXaBl9XA+4 ND0Vr+qq6ok+19XaVl9CrjdQtaXerBw+FSeCn3+FfkfU1aOvO/fBMBjnjXaLocoM j9qHU0myRUkPiee5nNW43S9ztYH7/OZW0kd3Fg/9dEuYQr8XXsyPaj5Itfpd5xb9 1y+gs2QyiZxdCZHhM2lIzR9LpgEp6u/riICK86KnEo4pQURBxQApM4FTFkzIOkQ4 i6+aVGYiw76I+yCPxNswwXoYzoUc0NAtSOG13N/AIsCbl2uX+Q38RFlbJYoV4tJo A7JqjVXPwm6fFQXTuKUu/yhP1GRuWugcK3rFE/vunjrbeb6iRNTXez0r5+hL5uO7 SmycNlG+pcur4X8PJ2ykWlqRgZ5B9qZj1BzptLO+v5ski4nEDrcdYqTMixSVozc2 sphPFztbXogwBnQhXDh1dGBJxyiLnwtwfYEYwwYp36g36ko1uf0CAwEAAaOCAhYw ggISMA4GA1UdDwEB/wQEAwIFoDAdBgNVHSUEFjAUBggrBgEFBQcDAQYIKwYBBQUH AwIwDAYDVR0TAQH/BAIwADAdBgNVHQ4EFgQUbWrrCO0a9XVSu8OTLF5ktFx4+LIw HwYDVR0jBBgwFoAUFC6zF7dYVsuuUAlA5h+vnYsUwsYwVQYIKwYBBQUHAQEESTBH MCEGCCsGAQUFBzABhhVodHRwOi8vcjMuby5sZW5jci5vcmcwIgYIKwYBBQUHMAKG Fmh0dHA6Ly9yMy5pLmxlbmNyLm9yZy8wHwYDVR0RBBgwFoIUYXJhY2huZS51bmkt a29lbG4uZGUwEwYDVR0gBAwwCjAIBgZngQwBAgEwggEEBgorBgEEAdZ5AgQCBIH1 BIHyAPAAdgB2/4g/Crb7lVHCYcz1h7o0tKTNuyncaEIKn+ZnTFo6dAAAAY0cHi8Q AAAEAwBHMEUCIQDGF4SY8rbylIfTLi/nZ5Tg5gdVXsoSSs6ZTivI5YuLhgIgfEcZ gLaeoGgtV9x5JMRrnYSF8fbV8+f8qvxJeqYKLRkAdgCi4r/WHt4vLweg1k5tN6fc ZUOwxrUuotq3iviabfUX2AAAAY0cHi7lAAAEAwBHMEUCIQDmY6tT5SmPB6sUzJ8e 6Vd7pJlVptzXQiwxv3O8wHgq5wIgVyFfpVud6FybxHS6OSoqDxfD0P5DWRDCZwpT EhetP/YwDQYJKoZIhvcNAQELBQADggEBABz6aBdAQWM4TIMShPi8Z3weKy8YPwQQ HkhOoN/woWDeTG8t5AmwRXEEemP5p9a5pporTArY5sxqvKT5nnzKlDhW2mpfLUSH dTOYuzyyFv7+z31ZrxCKl24PG85In4kSH9SyQnvDM6RlMLCpgZ8BR4yYPb3jQLle jVWtiI2pHUarwlrW6Fdapz8anzpvYKSfL+eCt11Esx9x82TKA3OD2wuPCqoq5ioV RZ5NA3/x72G68bdjbX3TzORM7R6DsH+AromgwHW1yKIxlP6aLW7A+h/dLldHDKRU RDtH7o/wU1s3V4STAVeYUv4KuD2uf8jpA3Lyhda8C7w8KambnDK70TU= -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAnVt+agoyy9twwo/mlAq/ 0srBf7VDaYC1JwRxvbmoEWFa2ItPNipqV7kUjBWtrhIIf3DnqlOl73rE9m7UaDGS qzKdnSilyQ7b4/622UBktRoB6D1qNTNWmIpma6VzLS18Us/CA4rzMdLU2cAPp4Re Pid0lCuGGPm7OWjS0rgtYN3GJWcFtlYNJymiYX+Bp39gaSVJBLdxl7FCU5TumKC9 m+B22WpCL71kKVUVST63YpNpEQYXaBl9XA+4ND0Vr+qq6ok+19XaVl9CrjdQtaXe rBw+FSeCn3+FfkfU1aOvO/fBMBjnjXaLocoMj9qHU0myRUkPiee5nNW43S9ztYH7 /OZW0kd3Fg/9dEuYQr8XXsyPaj5Itfpd5xb91y+gs2QyiZxdCZHhM2lIzR9LpgEp 6u/riICK86KnEo4pQURBxQApM4FTFkzIOkQ4i6+aVGYiw76I+yCPxNswwXoYzoUc 0NAtSOG13N/AIsCbl2uX+Q38RFlbJYoV4tJoA7JqjVXPwm6fFQXTuKUu/yhP1GRu WugcK3rFE/vunjrbeb6iRNTXez0r5+hL5uO7SmycNlG+pcur4X8PJ2ykWlqRgZ5B 9qZj1BzptLO+v5ski4nEDrcdYqTMixSVozc2sphPFztbXogwBnQhXDh1dGBJxyiL nwtwfYEYwwYp36g36ko1uf0CAwEAAQ== -----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 321751547942748413108024224129166199459057 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.113549.1.1.11 (sha256WithRSAEncryption) . . . . . . . . . . . . [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 'US' . . . . . . . . . . . . [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 'Let's Encrypt' . . . . . . . . . . . . [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 'R3' . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-01-18 09:29:16 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-04-17 09:29:15 +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 2.5.4.3 (commonName) . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'arachne.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 (4208 bits) . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 641962173995682847355739381906815343765461121148534361047759902619008354818281923146954833550359330697691726833687725646396507947594128221468213936602339894559654640677824421184821853731311148910301265900783926001899589979032246985661984038754743283353383241369156965480884898142968074525611347772477575793920376370408569889197242704837537105541580731884109747435783629130940211569253496515690610801105286868566730202011976893498694230173395409009986288781065833156022214645636223020657052568354293971554228511019634161108133643124040177255454894588418758524207137295023428750330566881617150230794536162947766684904288767284500203076025211461802561352482059529828696890320067974476514112577911720299749837189678391834701495250831791486626247009356093205833816727457003679900491512578685542642017069462484095161037685423169360884402696391613211323470615797605376328581938740876481861182878964777829671172943448993869928851629137474452655446357234695705779046907452341293928830322174264733478500265456050015262523311725099343652706161467728737187981232017441691819242023672664904805151162148366623721969183558712079263131323629756687498796456077137807321423205152696885703554626121165342834668812398121456117673328590343256479169362429 . . . . . . . . . . . . . . . . . . . . [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 2.5.29.15 (keyUsage) . . . . . . . . . . . . . . . . . . . . [c:0|t:1|false] BOOLEAN true . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (4 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:3|false] BIT STRING (3 bits) 05a0 . . . . . . . . . . . . . . . . [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 (22 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:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.3.2 (clientAuth) . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.19 (basicConstraints) . . . . . . . . . . . . . . . . . . . . [c:0|t:1|false] BOOLEAN true . . . . . . . . . . . . . . . . . . . . [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 2.5.29.14 (subjectKeyIdentifier) . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (22 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (20 bytes) 6d6aeb08ed1af57552bbc3932c5e64b45c78f8b2 . . . . . . . . . . . . . . . . [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 142eb317b75856cbae500940e61faf9d8b14c2c6 . . . . . . . . . . . . . . . . [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 (73 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.48.1 (ocsp) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://r3.o.lencr.org' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [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://r3.i.lencr.org/' . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.17 (subjectAltName) . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (24 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'arachne.uni-koeln.de' . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.32 (certificatePolicies) . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (12 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.23.140.1.2.1 (Domain Validation Certificates Policy) . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.4.1.11129.2.4.2 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (245 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (242 bytes) 00f000760076ff883f0ab6fb9551c261ccf587ba34b4a4cdbb29dc68420a9fe6674c5a3a740000018d1c1e2f100000040300473045022100c6178498f2b6f29487d32e2fe76794e0e607555eca124ace994e2bc8e58b8b8602207c471980b69ea0682d57dc7924c46b9d8485f1f6d5f3e7fcaafc497aa60a2d19007600a2e2bfd61ede2f2f07a0d64e6d37a7dc6543b0c6b52ea2dab78af89a6df517d80000018d1c1e2ee50000040300473045022100e663ab53e5298f07ab14cc9f1ee9577ba49955a6dcd7422c31bf73bcc0782ae7022057215fa55b9de85c9bc474ba392a2a0f17c3d0fe435910c2670a531217ad3ff6 . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.113549.1.1.11 (sha256WithRSAEncryption) . . . . . . . . [c:0|t:5|false] NULL . . . . [c:0|t:3|false] BIT STRING (2048 bits) 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