chailab.uni-koeln.de
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:f0:5e:a2:3b:9b:6b:c5:d9:62:6f:c0:59:e8:35:b6:f4:48 was issued on by Let's Encrypt.
With 2 subject alternative names this certificate can be used to secure multiple fqdn's. 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=chailab.uni-koeln.de
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 03:f0:5e:a2:3b:9b:6b:c5:d9:62:6f:c0:59:e8:35:b6:f4:48Serial Number (int): 343130415648976721791376619676406304404552
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: 6d:90:ec:4e:c8:cf:75:cb:25:66:c8:6a:c9:7e:5f:43:e8:45:49:50
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): 5b:cb:a9:df:bb:e9:2a:29:a0:89:a6:e6:0b:3a:54:b8:91:5f:34:e7
Fingerprint (sha256): 02:6d:5b:40:14:63:0c:4a:83:88:77:8f:4f:c2:ed:10:5f:78:6d:cf:16:b9:bc:73:65:9a:f7:e8:3a:aa:9e:eb
Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/
Revocation information
OCSP Server: http://ocsp.int-x3.letsencrypt.orgCheck the revocation status for certificate chailab.uni-koeln.de
2
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for chailab.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
chailab.uni-koeln.de
www.chailab.uni-koeln.de
www.chailab.uni-koeln.de
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Certificate
The complete raw certificate details for chailab.uni-koeln.de in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIGezCCBWOgAwIBAgISA/Beojuba8XZYm/AWeg1tvRIMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xOTA3MDcxOTI2MTVaFw0x OTEwMDUxOTI2MTVaMB8xHTAbBgNVBAMTFGNoYWlsYWIudW5pLWtvZWxuLmRlMIIC IjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAp8XONU9CnGHAdilSsaO1QTaQ bu8Ma0/RCQCRAMCIYx8C2VKK/xtLtwj2PyClFoozcbflIdEUD7TmK6E2DOB0vBMF f1P3RdUMZrCjaT8OJ/WvOVMe6G3I6JHJQQDMG97lzKGwyV0g/7Q/DM2Xstyi0Ne2 cpn47hTkedG7iqGfYwmJqMB3E0jRtdAYtUMVOEfgO9iKS8JfRWAyv8hD5x+MHi00 yM9aKTqGgQyKjaHMm6miOSbcQJSycQJRtPpS4mZEOy4Q4TsdP2NDXipRErzLse54 OuiZrosS+/b1EXnW3XBxYk8w4HEq3UjdVxFSw2SrY2vje3t0B7giFW9ZSbPN6S3C 9KnIvZmK78NCqft+jaAqbZZKVhVbXq3L1uGgYJHyzzFBX1LL3Vwy/7q3dhO/PdhS qEEiViITwXJ99StAFhVysfxqFLPzuDmJpmagxhPiQo3Q8v7ExJ7qn82C/k72qIvK f4KcBaZ2I1jlEUs2biYcaO/9mSHn9OjLcmuAwiuFQnWuAX0/Bv4lbKP0mi2Ch7cS rl9JpoxEivrMUhyLM/fW5ku+kjiWulj2hnjVOx360xYWfjN3V3t0C08gazTfrkZG Txrv4MXHhCI6P+3iiS12lDX2QdH+5jTgb7jNpxPnTzsJT9Nti+n4TfFQrQb9IDY3 Gtfk602g8orIve8ECp8CAwEAAaOCAoQwggKAMA4GA1UdDwEB/wQEAwIFoDAdBgNV HSUEFjAUBggrBgEFBQcDAQYIKwYBBQUHAwIwDAYDVR0TAQH/BAIwADAdBgNVHQ4E FgQUbZDsTsjPdcslZshqyX5fQ+hFSVAwHwYDVR0jBBgwFoAUqEpqYwR93brm0Tm3 pkVl7/Oo7KEwbwYIKwYBBQUHAQEEYzBhMC4GCCsGAQUFBzABhiJodHRwOi8vb2Nz cC5pbnQteDMubGV0c2VuY3J5cHQub3JnMC8GCCsGAQUFBzAChiNodHRwOi8vY2Vy dC5pbnQteDMubGV0c2VuY3J5cHQub3JnLzA5BgNVHREEMjAwghRjaGFpbGFiLnVu aS1rb2Vsbi5kZYIYd3d3LmNoYWlsYWIudW5pLWtvZWxuLmRlMEwGA1UdIARFMEMw CAYGZ4EMAQIBMDcGCysGAQQBgt8TAQEBMCgwJgYIKwYBBQUHAgEWGmh0dHA6Ly9j cHMubGV0c2VuY3J5cHQub3JnMIIBBQYKKwYBBAHWeQIEAgSB9gSB8wDxAHcA4mlL ribo6UAJ6IYbtjuD1D7n/nSI+6SPKJMBnd3x2/4AAAFrzh2agwAABAMASDBGAiEA 15DeAZik10HosskUGi6Rshcv3onkISXb/6Y+6g76yAoCIQDCcQ86oYi0tvDpQR8Q PEggcr9CPLJSNeZyjxgLOfLINwB2AGPy283oO8wszwtyhCdXazOkjWF3j711pjix x2hUS9iNAAABa84dmqMAAAQDAEcwRQIgNTx8xj/hnuhjtZeKsYFgqDhlS2aqfW0o LdH9G1Q8IRICIQC0IET6pmVxKeRdH2HQiT8Ci6sqObhzeDn+TA2lfX+TyDANBgkq hkiG9w0BAQsFAAOCAQEAGbyyGtdrOIRlMFhjg18g3tg331WVw51FlNttC3w8DFlj hOOcSMW35nMKj2YLn4kGsBEOrJO1TgrP7PCZU4LEyqBELKYtEuMJtJZuiBZfivF9 IFaPSS6YAIXF0kfCU+Pbjd1GOSPYq6RvlD7aEDH7B8pIQk3AG777j9nWhof6Asfg A6Q8fI/npDmHFER8oKCLfX/saaYbqQGuJAF6W0q2RlpCUoxeC+f+6gPglC4de5uk RN6NmUjRcgHQYYoW/QjXNOMMC9VtrFp9yC7Jf4Cl4zrnUqxO/DWG0MLwjYouXmbv Y7ID3s6wjTpRQCVq5q2nDOuXIteSAGqEOO0ux49geQ== -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAp8XONU9CnGHAdilSsaO1 QTaQbu8Ma0/RCQCRAMCIYx8C2VKK/xtLtwj2PyClFoozcbflIdEUD7TmK6E2DOB0 vBMFf1P3RdUMZrCjaT8OJ/WvOVMe6G3I6JHJQQDMG97lzKGwyV0g/7Q/DM2Xstyi 0Ne2cpn47hTkedG7iqGfYwmJqMB3E0jRtdAYtUMVOEfgO9iKS8JfRWAyv8hD5x+M Hi00yM9aKTqGgQyKjaHMm6miOSbcQJSycQJRtPpS4mZEOy4Q4TsdP2NDXipRErzL se54OuiZrosS+/b1EXnW3XBxYk8w4HEq3UjdVxFSw2SrY2vje3t0B7giFW9ZSbPN 6S3C9KnIvZmK78NCqft+jaAqbZZKVhVbXq3L1uGgYJHyzzFBX1LL3Vwy/7q3dhO/ PdhSqEEiViITwXJ99StAFhVysfxqFLPzuDmJpmagxhPiQo3Q8v7ExJ7qn82C/k72 qIvKf4KcBaZ2I1jlEUs2biYcaO/9mSHn9OjLcmuAwiuFQnWuAX0/Bv4lbKP0mi2C h7cSrl9JpoxEivrMUhyLM/fW5ku+kjiWulj2hnjVOx360xYWfjN3V3t0C08gazTf rkZGTxrv4MXHhCI6P+3iiS12lDX2QdH+5jTgb7jNpxPnTzsJT9Nti+n4TfFQrQb9 IDY3Gtfk602g8orIve8ECp8CAwEAAQ== -----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 343130415648976721791376619676406304404552 . . . . . . . . [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 2019-07-07 19:26:15 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-10-05 19:26:15 +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 'chailab.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 684452809509876883364126052113384546505843029551249141838842005611069719868278483019474905155777440078155699069312025850631542925631607919452726942178663475002113510709988270929686177471997227825141598158625073917906304419476126381979832183362987256111764341048086796776190445322379998286377642241099370976321072890099939420419234585174608920828104630681324152249432176954063649683909880591644532091834242819604925255919609495390127611354318122427511632973622345532723703154760059304909023314841995505217007208381203029291948460679515416163393179045232765345523434127282758525689617079009716918168565782983047622369090535084430932288463241349732270872104810590407713753589815272077547947821474141509906560979623362206944208553166745444907158469808476824805182489148218222792703622093691779477864741788900494801786702046649295438085946439621389394881044414828460544405249250145363402870085740540532087785499175288923396210990839154181885961516362284600622188925289586656231744054715538583035888797211478653014337557799037605795892750639772845370778874264627146926880481305835186649301048987499184165099410002234999624256719531563212105430644784203706379343681997299087035264215064350105264102588928287232765119368700431822304412175007 . . . . . . . . . . . . . . . . . . . . [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) 6d90ec4ec8cf75cb2566c86ac97e5f43e8454950 . . . . . . . . . . . . . . . . [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 (50 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'chailab.uni-koeln.de' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.chailab.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 (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) 00f1007700e2694bae26e8e94009e8861bb63b83d43ee7fe7488fba48f2893019dddf1dbfe0000016bce1d9a830000040300483046022100d790de0198a4d741e8b2c9141a2e91b2172fde89e42125dbffa63eea0efac80a022100c2710f3aa188b4b6f0e9411f103c482072bf423cb25235e6728f180b39f2c83700760063f2dbcde83bcc2ccf0b728427576b33a48d61778fbd75a638b1c768544bd88d0000016bce1d9aa300000403004730450220353c7cc63fe19ee863b5978ab18160a838654b66aa7d6d282dd1fd1b543c2112022100b42044faa6657129e45d1f61d0893f028bab2a39b8737839fe4c0da57d7f93c8 . . . . [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) 0019bcb21ad76b388465305863835f20ded837df5595c39d4594db6d0b7c3c0c596384e39c48c5b7e6730a8f660b9f8906b0110eac93b54e0acfecf0995382c4caa0442ca62d12e309b4966e88165f8af17d20568f492e980085c5d247c253e3db8ddd463923d8aba46f943eda1031fb07ca48424dc01bbefb8fd9d68687fa02c7e003a43c7c8fe7a4398714447ca0a08b7d7fec69a61ba901ae24017a5b4ab6465a42528c5e0be7feea03e0942e1d7b9ba444de8d9948d17201d0618a16fd08d734e30c0bd56dac5a7dc82ec97f80a5e33ae752ac4efc3586d0c2f08d8a2e5e66ef63b203deceb08d3a5140256ae6ada70ceb9722d792006a8438ed2ec78f6079