www.greenhead.ac.uk

Issued by R3

About this certificate

This digital certificate with serial number 04:72:80:d6:39:52:27:d5:d7:87:95:f2:9f:a8:c9:87:16:1b 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=www.greenhead.ac.uk

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 04:72:80:d6:39:52:27:d5:d7:87:95:f2:9f:a8:c9:87:16:1b
Serial Number (int): 387412587053622552274871905449568777999899
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: 69:b2:bc:47:e6:a2:ba:9a:e2:a7:50:90:be:e5:c0:92:d4:7a:a9:76
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): cf:11:26:4d:01:e2:95:aa:27:c3:cf:f9:90:bf:95:1d:09:cc:a2:43
Fingerprint (sha256): 47:06:2e:f5:13:97:6b:61:1d:82:18:be:ce:5f:da:50:41:eb:30:75:65:c3:19:c3:cd:7c:f1:57:68:12:3d:12

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

Revocation information

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

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

2

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for www.greenhead.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

greenhead.ac.uk
www.greenhead.ac.uk

Other certificates including the domain name greenhead.ac.uk

(limited to 100 certificates)
fortinet.greenhead.ac.uk
cedar.greenhead.ac.uk
gatekeeper.greenhead.ac.uk
Moondoor.academic.greenhead.ac.uk
www.greenhead.ac.uk
exams.greenhead.ac.uk
*.greenhead.ac.uk
svn.dev.greenhead.ac.uk
*.dev.greenhead.ac.uk
*.mx.greenhead.ac.uk
moodle.greenhead.ac.uk
exams.greenhead.ac.uk
viper.greenhead.ac.uk
gmis.greenhead.ac.uk
xibo.greenhead.ac.uk
www.greenhead.ac.uk
library.greenhead.ac.uk
viper.greenhead.ac.uk
greenhead.ac.uk
moodle.greenhead.ac.uk
Parallels.greenhead.ac.uk
cas.greenhead.ac.uk
cas.greenhead.ac.uk
webmail.greenhead.ac.uk
assets.greenhead.ac.uk
exams.greenhead.ac.uk
greenhead.ac.uk
mail.greenhead.ac.uk
netman.greenhead.ac.uk
www.greenhead.ac.uk
www.greenhead.ac.uk
viper.greenhead.ac.uk
jira.dev.greenhead.ac.uk
mail.greenhead.ac.uk
www.greenhead.ac.uk
cedar.greenhead.ac.uk
netman.greenhead.ac.uk
www.greenhead.ac.uk
*.dev.greenhead.ac.uk
exams.greenhead.ac.uk
webmail.greenhead.ac.uk
cedar.greenhead.ac.uk
www.greenhead.ac.uk
gmis.greenhead.ac.uk
www.greenhead.ac.uk
netman.greenhead.ac.uk
assets.greenhead.ac.uk
gatekeeper.greenhead.ac.uk
jira.dev.greenhead.ac.uk
netman.greenhead.ac.uk
mail.greenhead.ac.uk
mail.greenhead.ac.uk
pholden.dev.greenhead.ac.uk
cedar.greenhead.ac.uk
www.greenhead.ac.uk
gcintranet.greenhead.ac.uk
greenhead.ac.uk
exams.greenhead.ac.uk
gatekeeper.greenhead.ac.uk
moodle.greenhead.ac.uk
autodiscover.greenhead.ac.uk
moodle.greenhead.ac.uk
svn.dev.greenhead.ac.uk

Certificate

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

Certificate (PEM)

-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAquPLvGXob5U7qa2eXXbc
bhAbVxNoUGQxLyNM8OOIw5HOyjwQT12bUBS284XyatDMc72zZ24ZZLwiw7kR9UB9
Zvu4crZ4esYlAHGZ4lQu0lBuHW+tc4tKLVV7QU9bnGEOYkGdxJebFSdI+zpUh0xA
h97oWxJrA3PoP9DUicKRE5kAGwKKs55vOKl2eTgNJwSAiQqsgZlo7wetLo6dOQZM
X1Q8yYWIt80WCWjhzg10ZP+PdfFZtsVVHzX3HBhjg4q8K8hW88PHOxj/43ea0RvS
2e62WODUpSoCUf+STWMJddbs9nmhqoEO2yLqJIyNQF4CuWiCMyZLcEa8+bdYQnyu
jQIDAQAB
-----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 387412587053622552274871905449568777999899
 . . . . . . . . [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 2023-06-29 23:52:54 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2023-09-27 23:52:53 +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.greenhead.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 21572842161256492677229730570942859804365462028231491891853021320822342719374145919246378376737034185032542787222436934872260309922943853620342329253571963676179022271163877104883663268712892150581042171158658654914126267520045327471068283935900065891053837579008494526290303432328990962045576875813398343301424200966135832605339749739797521035321187923667811516997881029125220652294858530781975938581467398674015521560964635795727684075515690650120094958350949433150044363236346758914344943588463893681668223273957245647101629390953980784951432737318872909728727170377759998272680916380489295104276620794275179572877
 . . . . . . . . . . . . . . . . . . . . [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)
							69b2bc47e6a2ba9ae2a75090bee5c092d47aa976
 . . . . . . . . . . . . . . . . [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 (40 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'greenhead.ac.uk'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.greenhead.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)
							00f10076007a328c54d8b72db620ea38e0521ee98416703213854d3bd22bc13a57a352eb520000018909c9e76c000004030047304502200fa4a6dba7ab76dad2e09119d6556fb7c0e85968e51c351a9910a2468b760074022100f4a1fa22180742806f0e2c9dc938b12af49ad08b9f7ee3db49ef3391fe568853007700adf7befa7cff10c88b9d3d9c1e3e186ab467295dcfb10c24ca858634ebdc828a0000018909c9e7c40000040300483046022100841ab5a4f051bd113398dc5b94d3cf1a2b0190561216d60d7af113ea332375cc022100861939edc398bdeea7af10aae849b9862fce5e30dca355af998d6e9514794e49
 . . . . [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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