zulip.wtech.rub.de
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:07:42:03:2d:57:7e:7b:c3:23:b6:51:9b:5d:08:1a:20:22 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:
- Subscriber Certificate: commonName is deprecated. (BRs: 7.1.4.2.2)
Certificate Subject
CN=zulip.wtech.rub.de
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 03:07:42:03:2d:57:7e:7b:c3:23:b6:51:9b:5d:08:1a:20:22Serial Number (int): 263806579907980116269909563797972834721826
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: 03:15:a6:41:97:09:af:3d:81:ee:31:81:b0:20:01:45:b7:5a:2b:23
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): 91:64:ba:67:b2:d7:92:e4:06:84:f4:8e:c1:5d:b9:0b:28:81:df:4f
Fingerprint (sha256): 05:40:bc:90:8e:ae:9d:75:67:4b:1f:f6:6c:46:58:8f:53:29:04:a2:a6:fd:fa:56:3e:b9:e7:0a:5c:67:34:cc
Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/
Revocation information
OCSP Server: http://ocsp.int-x3.letsencrypt.orgCheck the revocation status for certificate zulip.wtech.rub.de
1
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for zulip.wtech.rub.de
Public Key Algorithm
RSA
Key Size
2048
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
zulip.wtech.rub.de
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Certificate
The complete raw certificate details for zulip.wtech.rub.de in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIFXTCCBEWgAwIBAgISAwdCAy1XfnvDI7ZRm10IGiAiMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xOTAyMTkyMjM5MjdaFw0x OTA1MjAyMjM5MjdaMB0xGzAZBgNVBAMTEnp1bGlwLnd0ZWNoLnJ1Yi5kZTCCASIw DQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBAKp4J+xqD4Vqhh8/O+qLbXw/yR+H WAtJpgCS9YkKR9VwPNzS3AuB4UKaNwSoXcJQVan0XmzaqZwU8QCa2xpTs/QB8RjZ nCX1jiWG+XuVtATPYxhf/SKnUmeTlcQO9LMDk/+zLtfEv9yxZgDiTQBiOD0Um0HS ETUi+2lNiFGyyQ+7Inaf0LkMzk8+7d+8DbCddSzLkIpt2B7zOY/CHSTCp4sHVkQb rk1w8l7vAryNOUUnkWkYQF0mp5vauw8qKHus+l6xuW8MioOtaha+x0qRN/WnYkBw djswmxb3Ei6QLZjPlDLqJKfWvyGuoqIt/Op5uwB61jGn5N6Ao5FtT/UmxtsCAwEA AaOCAmgwggJkMA4GA1UdDwEB/wQEAwIFoDAdBgNVHSUEFjAUBggrBgEFBQcDAQYI KwYBBQUHAwIwDAYDVR0TAQH/BAIwADAdBgNVHQ4EFgQUAxWmQZcJrz2B7jGBsCAB RbdaKyMwHwYDVR0jBBgwFoAUqEpqYwR93brm0Tm3pkVl7/Oo7KEwbwYIKwYBBQUH AQEEYzBhMC4GCCsGAQUFBzABhiJodHRwOi8vb2NzcC5pbnQteDMubGV0c2VuY3J5 cHQub3JnMC8GCCsGAQUFBzAChiNodHRwOi8vY2VydC5pbnQteDMubGV0c2VuY3J5 cHQub3JnLzAdBgNVHREEFjAUghJ6dWxpcC53dGVjaC5ydWIuZGUwTAYDVR0gBEUw QzAIBgZngQwBAgEwNwYLKwYBBAGC3xMBAQEwKDAmBggrBgEFBQcCARYaaHR0cDov L2Nwcy5sZXRzZW5jcnlwdC5vcmcwggEFBgorBgEEAdZ5AgQCBIH2BIHzAPEAdwB0 ftqDMa0zEJEhnM4lT0Jwwr/9XkIgCMY3NXnmEHvMVgAAAWkIIOcaAAAEAwBIMEYC IQC5b5zweWR5XAi971e592pRYW3GcxciVQoVZQm6CPJ8owIhAKSX2oOKVdqt8psz EMqifxQQM608xyzw4kQpgwdouJ5yAHYAY/Lbzeg7zCzPC3KEJ1drM6SNYXePvXWm OLHHaFRL2I0AAAFpCCDnhgAABAMARzBFAiEA6bPOFbZJolpfwJmsgNyHmGSsI+nn 7nHCkm+U9hScwwUCIC/UJkCpGYAHTz9G1EpJVKvVjH06iJwLoidRZYf+nh90MA0G CSqGSIb3DQEBCwUAA4IBAQAtQ1OTdmv7ndWerzcBRAmjZ2ydZ4xhDBrm+cSECvyr VkjUXwOnQ+QibpnlOq7bfnDlrXQu7ScVr6zXuuZFiHvFzVrKsTZltAZDlJpgcS7u x+uz7sO6gOApF3mKsjf3+ZJ7rBl2YQP4hqOMUFk3bcwo+afwzfLYmGOPZR2azwpv iVxusUSOco/1m8QrqumnokvujjovWS+ScFfzJJ0fops2SvtLhGvAC+N0utbXy/KH h8OTF08ibC5M9agPECLuygMdGdY9wrnYia+yP0RIXW2fZox0JM/LiMYs6pH4T6Ac Db5/OFIB4dP8/dUCHEyGZT0Jpt2F+TcG4pvBPSe4GpO0 -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAqngn7GoPhWqGHz876ott fD/JH4dYC0mmAJL1iQpH1XA83NLcC4HhQpo3BKhdwlBVqfRebNqpnBTxAJrbGlOz 9AHxGNmcJfWOJYb5e5W0BM9jGF/9IqdSZ5OVxA70swOT/7Mu18S/3LFmAOJNAGI4 PRSbQdIRNSL7aU2IUbLJD7sidp/QuQzOTz7t37wNsJ11LMuQim3YHvM5j8IdJMKn iwdWRBuuTXDyXu8CvI05RSeRaRhAXSanm9q7Dyooe6z6XrG5bwyKg61qFr7HSpE3 9adiQHB2OzCbFvcSLpAtmM+UMuokp9a/Ia6ioi386nm7AHrWMafk3oCjkW1P9SbG 2wIDAQAB -----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 263806579907980116269909563797972834721826 . . . . . . . . [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 'Let's Encrypt Authority X3' . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-02-19 22:39:27 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-05-20 22:39:27 +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 'zulip.wtech.rub.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 21519762952059052145558570266890811923628875554191003980555145460707146830662693515084469798104731397712435891471533782197840442570200411612065903772023983025072853660282078611827936899488176513272192788182118656263369402516756665523807866544202780925792749479995232770341824413003450932338192087923712697124350306034270968550876195026799860010866352068036815276127328296045678761096884556134151734924571868817742282078925495084829184741473271609997683337608022191544275448138723931805961549832740359297428526950620492460443318457550666760796858653905261667396901809515329451191939347034112874692252563749099668948699 . . . . . . . . . . . . . . . . . . . . [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) 0315a6419709af3d81ee3181b0200145b75a2b23 . . . . . . . . . . . . . . . . [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 a84a6a63047dddbae6d139b7a64565eff3a8eca1 . . . . . . . . . . . . . . . . [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 (99 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://ocsp.int-x3.letsencrypt.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://cert.int-x3.letsencrypt.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 (22 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'zulip.wtech.rub.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 (69 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 1.3.6.1.4.1.44947.1.1.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.2.1 (cps) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:22|false] IA5String 'http://cps.letsencrypt.org' . . . . . . . . . . . . . . . . [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 (246 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (243 bytes) 00f1007700747eda8331ad331091219cce254f4270c2bffd5e422008c6373579e6107bcc56000001690820e71a0000040300483046022100b96f9cf07964795c08bdef57b9f76a51616dc6731722550a156509ba08f27ca3022100a497da838a55daadf29b3310caa27f141033ad3cc72cf0e24429830768b89e7200760063f2dbcde83bcc2ccf0b728427576b33a48d61778fbd75a638b1c768544bd88d000001690820e7860000040300473045022100e9b3ce15b649a25a5fc099ac80dc879864ac23e9e7ee71c2926f94f6149cc30502202fd42640a91980074f3f46d44a4954abd58c7d3a889c0ba227516587fe9e1f74 . . . . [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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