greenhead.ac.uk

Issued by R3

About this certificate

This digital certificate with serial number 04:97:3d:41:89:62:8a:71:22:d4:56:d3:cb:2b:83:29:c3:ac 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=greenhead.ac.uk

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate will expire on

Certificate Details

Serial Number (hex): 04:97:3d:41:89:62:8a:71:22:d4:56:d3:cb:2b:83:29:c3:ac
Serial Number (int): 399913204325638700532635292411677098230700
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: 53:34:16:a6:3a:f6:ea:c7:43:19:2e:34:60:74:8c:1e:e4:ff:62:d4
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 44:59:b5:e1:be:62:44:f0:e0:6f:89:27:7e:ad:fc:e8:bd:e2:9b:a4
Fingerprint (sha256): 21:f2:b1:f2:4e:0f:9a:54:79:e7:e8:a4:75:6e:31:c7:fa:eb:4a:ae:cc:7b:e3:e8:16:d7:03:d1:6d:63:c3:11

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

Revocation information

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

Check the revocation status for certificate greenhead.ac.uk

2

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for 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 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-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAttQD3IErcnCgVl2Gt4wK
As8Gpj+yKeiStrl5r9crBk2YpO/w6X6+p2LpVqYGHu8jFcjFrOBpl+i7Lq3q44rS
N7xmjXXztC/FTn+gxtwZStOBcWU1SB8WilD3dqH5MwPS68PlHWSBRLoufJ+DNrPA
NThviyOulzpf5MCM8AuaB0H9wIKrd39H/lHXpBdEWxRMfkweyBFTy0Fv8IkOPRM+
Bco/g+Jh/KRk+hyQf/fnTIQ6htA2eN7NYoNggLCQ8ZjMHrG38nI66EmmmjgPURxJ
iMbH7XVYqT4qAVc088CrgShsJRwi3IVlJFnUljAUF64I8FODQqZSWwFZBr9MRgL0
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 399913204325638700532635292411677098230700
 . . . . . . . . [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 2024-04-29 23:00:11 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-07-28 23:00:10 +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 '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 23079920038015914299249607198783123674473902552604897667382396271837347680194224014218766325774739609775483093378031668107251190690048488345553925982173915903614955155127945131328151805006517650085888498944968965526587929175194802726627863700973059363395381855794101705738206968397733875217177605952624906017689516336787215603048458670852632573190117788087193401198685403970568373513466619051554453743345481927515741040554397770967454857951803715052379578231829158095583382540533895650866201440596854443998340260014717479670042885520342953989863116324378081224157499269133726162129857265457629767397556949088223818967
 . . . . . . . . . . . . . . . . . . . . [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)
							533416a63af6eac743192e3460748c1ee4ff62d4
 . . . . . . . . . . . . . . . . [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)
							00f00076003f174b4fd7224758941d651c84be0d12ed90377f1f856aebc1bf2885ecf8646e0000018f2c4d41630000040300473045022100daf0982da9bcc1342ded3b4367cae8913229367ffc75f9f01787e9b28b94c2e102200d7ecfce1c0ce7e70bf764463612ac4ad09c05b9fff0485cecf3fd2b042b692d00760048b0e36bdaa647340fe56a02fa9d30eb1c5201cb56dd2c81d9bbbfab39d884730000018f2c4d416a0000040300473045022100d6d7c5f075be6261b435dee33a1af8ac60f1b6b0c7805e29a7e5b9140751f1e602203c281129c7af41ca5a16390ab54b1c5a1d88ea6e75bb55fc403efa9ac19871eb
 . . . . [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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