www.greenhead.ac.uk

Issued by R3

About this certificate

This digital certificate with serial number 04:e3:d2:d3:e7:c5:4b:7e:f4:ea:51:bd:5b:67:02:15:35:8a 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:e3:d2:d3:e7:c5:4b:7e:f4:ea:51:bd:5b:67:02:15:35:8a
Serial Number (int): 425973479172713932290436717973527059576202
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: 2c:4a:26:19:40:8b:5f:3a:fd:5e:c5:2f:a8:39:94:25:74:22:31:c4
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 86:6e:c9:22:cb:13:f0:e3:29:e1:fa:50:d6:79:a5:81:5d:d5:da:5d
Fingerprint (sha256): da:70:a1:eb:39:3c:2d:32:d3:45:0d:19:b7:8a:f9:1c:de:17:e4:cc:f9:70:e2:82:95:dd:69:50:6b:1f:b8:df

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-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAvg9Il5E1aZwOJ23y9+bR
UKU+pa0fVWVTuvyym1QGSikZZpoqH8vTyAIRWUWYYXROE3q4XZKrGTC1P3F3Q7uP
aFJA53lo+2fou2cc2PcwiUqiSqZa7tM41uLH0VhlGFBk5wJvzxQzQbQvcoShiynB
cQgqy5Gq8bACGeDRO5F56BWutlZL8+9uCn3t15kwjpN0uLjJyid6bAlrzRdykUTC
fxDxh6ceCy3hr7UztjMky181iPpszT9GWC70chPO0ekA9k2aW05xDWt5ESFb7U04
RMLc8XzxQ6t6gDm9JxnPxEN65nkMcszPWNaeBceO31o6dp4Vt/IaYPmiPoEpYa9s
nQIDAQAB
-----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 425973479172713932290436717973527059576202
 . . . . . . . . [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 2023-08-29 22:58:30 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2023-11-27 22:58:29 +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 23992814549227554927287215317086139100963653823670456439711628604579336752476703743188659893657669754658071739390651609355473508361420061369069660261443398043481495067498069249794402416219140029469190041449935264571889267960416563605211433393925201374594577496393389274423285356802501478784579429350310235700005216678324409579666095237360885848540328905753519028860797479926004399200372859496679701590590333258627150411882870723830900188884215079007072714354925659507871347856982037602119458159797203147929044996699802925848403042848362986249477422933278168536379343676857346731121183749602475203417734137212172201117
 . . . . . . . . . . . . . . . . . . . . [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)
							2c4a2619408b5f3afd5ec52fa8399425742231c4
 . . . . . . . . . . . . . . . . [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 (244 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (241 bytes)
							00ef0076007a328c54d8b72db620ea38e0521ee98416703213854d3bd22bc13a57a352eb520000018a43bc077c0000040300473045022100d4fd60a7658aa27965a9c7d63043e7a3fc96044eea60f4b2e1d96973ce6186f602207a0f34673148e55df9177cd49f6ff77c43d2d5ffe9b5af3abd652d7447c38f62007500b73efb24df9c4dba75f239c5ba58f46c5dfc42cf7a9f35c49e1d098125edb4990000018a43bc07840000040300463044022014a90d4d691fab932270c5fc42a98ffa2bd7f11a59fb1b69012c58be53a0f5a70220663e873dbf3513661f86cd6afe99810599bd35b00f0d26464c5df004356e88ab
 . . . . [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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