www.selby.ac.uk

Issued by R3

About this certificate

This digital certificate with serial number 04:8d:12:57:96:ab:90:6e:cf:0c:23:ec:ca:84:a5:8b:63:dd 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:
  • 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=www.selby.ac.uk

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 04:8d:12:57:96:ab:90:6e:cf:0c:23:ec:ca:84:a5:8b:63:dd
Serial Number (int): 396453338352598287089245376507422916174813
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: d1:3f:4c:95:50:95:a7:d7:53:44:be:a3:46:c8:0d:dd:2d:11:01:7f
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): b9:81:72:ab:8f:34:e7:03:7f:fe:be:39:04:c7:a8:84:03:6f:fc:09
Fingerprint (sha256): bf:fd:97:a3:55:fa:37:b5:2a:ae:51:69:02:24:61:5c:c3:f1:b9:28:95:44:8b:5b:8b:56:15:c8:80:bf:36:8b

Issuing Certificate URL: http://r3.i.lencr.org/

Revocation information

OCSP Server: http://r3.o.lencr.org

Check the revocation status for certificate www.selby.ac.uk

2

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for www.selby.ac.uk

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

selby.ac.uk
www.selby.ac.uk

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(limited to 100 certificates)
moodle2.selby.ac.uk
moodle2.selby.ac.uk
moodle2.selby.ac.uk
moodle2.selby.ac.uk
moodle2.selby.ac.uk
selby.ac.uk
moodle2.selby.ac.uk
remote2.selby.ac.uk
mail.selby.ac.uk
moodle2.selby.ac.uk
moodle.selby.ac.uk
remote2.selby.ac.uk
selby.ac.uk
www.selby.ac.uk
remote2.selby.ac.uk
www.selby.ac.uk
www.selby.ac.uk
moodle2.selby.ac.uk
www.selby.ac.uk
selby.ac.uk
selby.ac.uk
etracker.selby.ac.uk
moodle2.selby.ac.uk
selbycp.selby.ac.uk
etracker.selby.ac.uk
selby.ac.uk
mail.selby.ac.uk
moodle2.selby.ac.uk
etracker.selby.ac.uk
selbycp.selby.ac.uk
selbycp.selby.ac.uk
selby.ac.uk
moodle2.selby.ac.uk
selby.ac.uk
selby.ac.uk
selby.ac.uk
www.selby.ac.uk
selby.ac.uk
selby.ac.uk
shibboleth.selby.ac.uk
moodle2.selby.ac.uk
selbycp.selby.ac.uk
selbycp.selby.ac.uk
selby.ac.uk
moodle2.selby.ac.uk
remote.selby.ac.uk
selby.ac.uk
www.selby.ac.uk
www.selby.ac.uk
selbycp.selby.ac.uk
selby.ac.uk
www.selby.ac.uk
selby.ac.uk
selbycp.selby.ac.uk
shibboleth.selby.ac.uk
shibboleth.selby.ac.uk
moodle2.selby.ac.uk
www.selby.ac.uk
www.selby.ac.uk
remote2.selby.ac.uk
shibboleth.selby.ac.uk
mail.selby.ac.uk
www.selby.ac.uk
remote2.selby.ac.uk
etracker.selby.ac.uk
selby.ac.uk
moodle2.selby.ac.uk
moodle2.selby.ac.uk

Certificate

The complete raw certificate details for www.selby.ac.uk in PEM and ASN.1 format.

Certificate (PEM)

-----BEGIN CERTIFICATE-----
MIIE+TCCA+GgAwIBAgISBI0SV5arkG7PDCPsyoSli2PdMA0GCSqGSIb3DQEBCwUA
MDIxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MQswCQYDVQQD
EwJSMzAeFw0yMzEwMTgxMjQzNThaFw0yNDAxMTYxMjQzNTdaMBoxGDAWBgNVBAMT
D3d3dy5zZWxieS5hYy51azCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEB
AI6O4BXV5kX7nHMXvy9GmSMtSp2AZM6zckGKBAJpoUuqckdPIhbJ5qXsEQ5kyOhJ
UAiWGqIHRXQVx4KX2YQETfyMTRGwYpY2dW5x/KSppy1QGaveFCghzscrsjtHzJIr
k8zqd++5g8PdMWcbIk2rO9eV9ofXP9tamgxRk60vIFtBHqpy94088F6ScHf3ORaV
y6AvlyW/tJ+TMZoSagnrZi/x6rwCtmhM0UkenIHjnDxf4ciX8hLs2TJMeDWEJJ0g
mCy6XiYwBN35rFEScBgB9a6hK1Si0qN3SLcA5wRbxlSQxuMqOYWq/OkaCUdm7Hd1
16lCLy/SzboaLkqfC5SmIZ8CAwEAAaOCAh8wggIbMA4GA1UdDwEB/wQEAwIFoDAd
BgNVHSUEFjAUBggrBgEFBQcDAQYIKwYBBQUHAwIwDAYDVR0TAQH/BAIwADAdBgNV
HQ4EFgQU0T9MlVCVp9dTRL6jRsgN3S0RAX8wHwYDVR0jBBgwFoAUFC6zF7dYVsuu
UAlA5h+vnYsUwsYwVQYIKwYBBQUHAQEESTBHMCEGCCsGAQUFBzABhhVodHRwOi8v
cjMuby5sZW5jci5vcmcwIgYIKwYBBQUHMAKGFmh0dHA6Ly9yMy5pLmxlbmNyLm9y
Zy8wJwYDVR0RBCAwHoILc2VsYnkuYWMudWuCD3d3dy5zZWxieS5hYy51azATBgNV
HSAEDDAKMAgGBmeBDAECATCCAQUGCisGAQQB1nkCBAIEgfYEgfMA8QB3ANq2v2s/
tbYin5vCu1xr6HCRcWy7UYSFNL2kPTBI1/urAAABi0MHYM4AAAQDAEgwRgIhAO8E
EH3A4aAwTTEte3/d663mA6bH4YNmPTk+H3kZJ0WRAiEA655OAaA6TC5CSaKSkVlY
cHRp0HiKUP92jAFKYbEKL2YAdgA7U3d1Pi25gE6LMFsG/kA7Z9hPw/THvQANLXJv
4frUFwAAAYtDB2C8AAAEAwBHMEUCIQCWZby0f1v/5oIeZ3OMYSIDEWEiufgKRNYR
8RJw3EYIhgIgJmIBKAZNBpVrKLd5zSlpFy7qip+IaM0rt9vcB2sBXoEwDQYJKoZI
hvcNAQELBQADggEBAGqDfCPg1Q9MXQgmm28+U926KE3USx0EYmYcK2vdevFc7hDo
MgJlgE1xARpY66uCfd7aHYkguHQbxBujjg5+7A2lgmG3dKQQGfcfwdC3YGEYDvwF
M3uvv7wWMqt1ZhxQLiAVhGepKIfSAfmzED4bT9a33ZewJE15sGyJZjHP+xquTBTy
6S21KCglMCfouW+CuNBK1CgCKmhGgnreGRQF3TEFhrpW4mJiQas/SGIynsQhFZgS
bCfQO5uB0zDxrbQUpsyOl/LNuZhU+xL2nsyviePJ8dBIy7GqQEm0padJTTJtwiXQ
1NaT1FtGhPPtzq9X9N5R/xpiG2Vo+fHaIDo5ons=
-----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAjo7gFdXmRfuccxe/L0aZ
Iy1KnYBkzrNyQYoEAmmhS6pyR08iFsnmpewRDmTI6ElQCJYaogdFdBXHgpfZhARN
/IxNEbBiljZ1bnH8pKmnLVAZq94UKCHOxyuyO0fMkiuTzOp377mDw90xZxsiTas7
15X2h9c/21qaDFGTrS8gW0EeqnL3jTzwXpJwd/c5FpXLoC+XJb+0n5MxmhJqCetm
L/HqvAK2aEzRSR6cgeOcPF/hyJfyEuzZMkx4NYQknSCYLLpeJjAE3fmsURJwGAH1
rqErVKLSo3dItwDnBFvGVJDG4yo5har86RoJR2bsd3XXqUIvL9LNuhouSp8LlKYh
nwIDAQAB
-----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 396453338352598287089245376507422916174813
 . . . . . . . . [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 2023-10-18 12:43:58 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-01-16 12:43:57 +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 'www.selby.ac.uk'
 . . . . . . . . [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 17996293757846753225565386571799329612916848426268691839972942804357726445156770476224030428704284667270349315843370480946029801458724773498775926548415743530350236653832626482731962359428056302663983072283197277237724427394354392617205640608531592779052800086221218643714318685979547166563423831420766812681032165427346778443962995021955369226981384793654222731736128506587883256130528339411342406709312596500855303225792572256477214116566867277684542983071705329261226179699815930447013533682619380649688253893535361769971381347478278338163510456652175597038665804076908189380965629606377446782177743631948227944863
 . . . . . . . . . . . . . . . . . . . . [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)
							d13f4c955095a7d75344bea346c80ddd2d11017f
 . . . . . . . . . . . . . . . . [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 (32 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'selby.ac.uk'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.selby.ac.uk'
 . . . . . . . . . . . . . . . . [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 (246 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (243 bytes)
							00f1007700dab6bf6b3fb5b6229f9bc2bb5c6be87091716cbb51848534bda43d3048d7fbab0000018b430760ce0000040300483046022100ef04107dc0e1a0304d312d7b7fddebade603a6c7e183663d393e1f7919274591022100eb9e4e01a03a4c2e4249a292915958707469d0788a50ff768c014a61b10a2f660076003b5377753e2db9804e8b305b06fe403b67d84fc3f4c7bd000d2d726fe1fad4170000018b430760bc00000403004730450221009665bcb47f5bffe6821e67738c612203116122b9f80a44d611f11270dc460886022026620128064d06956b28b779cd2969172eea8a9f8868cd2bb7dbdc076b015e81
 . . . . [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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