www.selby.ac.uk

Issued by R3

About this certificate

This digital certificate with serial number 03:7b:4e:1e:31:54:f6:10:7a:09:b0:fc:88:4e:97:75:4a:ee 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): 03:7b:4e:1e:31:54:f6:10:7a:09:b0:fc:88:4e:97:75:4a:ee
Serial Number (int): 303295425479702539890448832764419354479342
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: c7:1e:5f:f0:7a:5c:c4:f4:6c:85:10:23:12:9f:93:e1:9c:62:7a:b2
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 4d:cb:65:47:49:e7:4f:c4:37:a4:51:5c:34:e4:87:9a:cb:f3:9c:1f
Fingerprint (sha256): df:b6:0b:b1:e6:b5:ab:ff:1c:b6:a1:23:8b:0f:b3:21:e4:8d:d4:ff:56:3f:56:15:03:50:41:c4:57:5f:e9:7b

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-----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-----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAzbp882Z9TfvoJJYmy9tu
Ar3sIy8NC3GXS0knws29hsTe5FTJynT5g+9T93Kxer4v0/T+2ryDssd9fcQRBQuB
pm13kcwqnT+LGMC0kq/8q2XbKCDuBvehhvr7VYbpAr6C8jfTMeDdq6OlNoaEPUUi
u0CEHXgRb9YxvAh0N1eqbdJBOEay/1LyLJjpRInTEzCzrE7NHmgylsJVR5yyXAIX
XS/k9zgyJEMmP26i3JBHWSKOKR+F/9+7YUf3+8UdHBde0SgoeRSmvNntaTsPxNnb
FwJd9k/V+IvBo9yHwYLvjg2Eqm28X0w1cOojsgQ7Avod4265qvDb+1W+f4W2RV6z
4QIDAQAB
-----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 303295425479702539890448832764419354479342
 . . . . . . . . [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 2023-12-17 14:25:23 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-03-16 14:25:22 +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 25970813222147629373095560684364138607088545452186152098769011312178801110383443518277384657458869575232130932199901370724204727710320916946646876391220118318579467669669615273709375972893695210465686978791036866476567229055503114863237227921286091037678454809515372238005821436053641603142003985770365907787579842724310746543165666475290210500453259078383818371661919537693600030570189758451785886434629152282704076117691293297555441178003711336710737525691503316572751225650721728979301157464795458353724304380093551098511007674238060112792312457324819435525852946487124828170440678918185170019825519899959625692129
 . . . . . . . . . . . . . . . . . . . . [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)
							c71e5ff07a5cc4f46c851023129f93e19c627ab2
 . . . . . . . . . . . . . . . . [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 (245 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (242 bytes)
							00f000760048b0e36bdaa647340fe56a02fa9d30eb1c5201cb56dd2c81d9bbbfab39d884730000018c7861ca9800000403004730450221009e3ab841e09cb9b39d85cea4fbf0b4a47c8cb2b53a3c195bb814765198e1bc0902200d99ea3c1a720392995513bfcf88012ad675900ebb1e0b048da469be591c3e5300760076ff883f0ab6fb9551c261ccf587ba34b4a4cdbb29dc68420a9fe6674c5a3a740000018c7861cacf0000040300473045022018cbd9b05e59562efd89a89114fdd1d59d46a677d7f3b9729c81f84ae8ef5189022100a9fa9ff1bb61941204a70433441e74616136971a294b1c238bfae5f633bf47df
 . . . . [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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