www.greenhead.ac.uk

Issued by R3

About this certificate

This digital certificate with serial number 04:44:74:69:a2:13:6f:76:6d:2c:53:51:ac:91:ce:d0:95:8f was issued on by Let's Encrypt.

With 2 subject alternative names this certificate can be used to secure multiple fqdn's. This certificate is currently not expired, we haven't checked the revocation status of this certificate but you can do this simply on revocationcheck.com. 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.greenhead.ac.uk

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate will expire on

Certificate Details

Serial Number (hex): 04:44:74:69:a2:13:6f:76:6d:2c:53:51:ac:91:ce:d0:95:8f
Serial Number (int): 371743083603636185384397030700756134565263
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: 37:67:92:ee:12:9a:ab:9f:17:78:0e:a9:3e:12:27:e9:9c:32:e5:22
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 5b:1d:2b:c3:0e:19:44:c5:40:40:71:20:d0:97:09:b2:da:2b:95:4d
Fingerprint (sha256): a6:08:fb:7e:ef:86:63:68:e8:32:de:12:6a:ee:de:03:61:06:10:6e:2b:41:63:ee:08:bc:d6:36:77:4f:60:32

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
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-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA48c9+9y7oNmvt6FXloVb
5tbP76HwZZJ3TdCDFY+98xJZ/eHJ9IC3CiMejJ2qqX3rqSqhlzmo1WX/2kmKUNDi
SLm3oEZs8cd8jTkSDttbv1yPb9yySIWIy+DNeCARmZPB7X2ZngKjKAoHCP5cY00U
LvM7AdsugDDSXuvqFU17rjfoMIFL14GhPdwy9sSGbYCdg7K95330r5L3zhWUb4l7
k6NZlhqmxu6Xl+EivpNIHuQrsdrXt5mu1WP+tKzm5v4j800pY2Sxupor/sjbw1qY
D14kh1GaRz4jDD9uIVigcFs2B+xD2lQlZJ6JsKl2ndvhY4QAp+SJ0D6lvK0i4lbA
1wIDAQAB
-----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 371743083603636185384397030700756134565263
 . . . . . . . . [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 2024-02-28 23:59:02 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-05-28 23:59:01 +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 28754345180644493771013105058527534713619346190620855040790943943512537348271287795540625805147127813750597587700544482042055342038862531007682782497488187983287975538094637054733526433587694860925632394992456837172227726780919144403638069513360814714960939381872338222046443085581419243797680575843517134482464265938666806708724427988973505863944899279723983223947691675299245414470800902016634210356984643922475744611882803032652814689580944492468611798237900566337935776246161239629012277086439072530090579439673684620414352606263477067079688687174336549249729114057267930174362697293851267877698760869938130763991
 . . . . . . . . . . . . . . . . . . . . [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)
							376792ee129aab9f17780ea93e1227e99c32e522
 . . . . . . . . . . . . . . . . [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 (245 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (242 bytes)
							00f000760048b0e36bdaa647340fe56a02fa9d30eb1c5201cb56dd2c81d9bbbfab39d884730000018df25f383d0000040300473045022100f70e594eb000ed0959701758e431890dd4ba32e9efdd41217e08406b892337d502203a12285cbfb5e304c7db88d0df4e2e133814dba2a5aecf1406e38d669cfd269500760076ff883f0ab6fb9551c261ccf587ba34b4a4cdbb29dc68420a9fe6674c5a3a740000018df25f39160000040300473045022100c5146ea024ae6e719954b00379fa7428b83ad95e64985d322a51c8100cd47e6e02203317a3502effe589983542057a822f44fdf5a32b825bff570dac1ba4bcbe13b6
 . . . . [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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