greenhead.ac.uk

Issued by R3

About this certificate

This digital certificate with serial number 04:06:43:00:6f:31:c9:a4:02:e8:0b:85:a3:a1:bb:eb:23:4a 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=greenhead.ac.uk

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 04:06:43:00:6f:31:c9:a4:02:e8:0b:85:a3:a1:bb:eb:23:4a
Serial Number (int): 350579898459576257463828485326448183944010
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: ff:b2:4a:6e:26:55:d6:46:a1:00:44:e1:5b:60:d5:42:76:79:34:c6
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): e1:f8:5e:7f:7d:c0:a5:18:c5:4b:7d:f4:bb:8a:2a:a0:d3:10:6b:47
Fingerprint (sha256): 78:48:cc:b7:4f:3f:d1:6a:9a:0a:cc:ae:1c:d5:d4:c8:87:d2:a3:7f:41:5e:55:88:90:2d:c6:eb:43:f0:a7:d3

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)

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-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAunA9EsOGc0TiMEpZrvdM
tFw9a4IlZnUgE3ebLDkEx843VSCctYGQ4Ybtv13ww+WnKch+p9wBWR4eeel0yNFj
c60IpvadccKA/nNS4h3EjpZMzSJhVLda53SI1VfQogPD2+8htoIQ8jfcLUmaNBu3
cDrkiy8jHeJssIbEcE2FYC8K9aFtWTyB49hrGcn7dkGp7PIZmx9vrcossWDmK0ef
uUpsliQZ8UF+bJQpbSfb1HeIa2nTSmCnIuTKejV6etAFB6iPE2cNwb3EA//JrNxd
E50klHn6ueGoOLWRbqBd8UmEq4rcgpATiYRGFd2Wt+Nl2KvinNui+KojJR8ipXZz
RQIDAQAB
-----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 350579898459576257463828485326448183944010
 . . . . . . . . [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 2023-02-28 00:04:54 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2023-05-29 00:04:53 +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 '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 23535671624159159472762556496842981056207285679575809258938686930254979268750786863309064549373127934994365289961547021408953887256566940107849088533548511044158377712512193678260153025268958592375287363062792240378713874927511083550059120130389722563893820582846592724058715468851694848788608879474308125231600654630459873887626448603583435001623892149937307750003699642116407831944546557592084936539177122909881426506301549493159674309023036460648272157528157980630578577221846995449603693390659307673689143247640170187763098688900616042596310409217046030374546773929936162326674108343067485703346754295340226474821
 . . . . . . . . . . . . . . . . . . . . [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)
							ffb24a6e2655d646a10044e15b60d542767934c6
 . . . . . . . . . . . . . . . . [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 (69 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 1.3.6.1.4.1.44947.1.1.1
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.2.1 (cps)
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:22|false] IA5String 'http://cps.letsencrypt.org'
 . . . . . . . . . . . . . . . . [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 (243 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (240 bytes)
							00ee007500b73efb24df9c4dba75f239c5ba58f46c5dfc42cf7a9f35c49e1d098125edb49900000186958d0d5b000004030046304402203e0518dc34d374379da6d6882dba3b15b4227618f65f5df4b810f57c9d0c40fc022026dee8202e73dcd4e506b178631ea72a18585e72ca355eaf2df27a1ff69a05500075007a328c54d8b72db620ea38e0521ee98416703213854d3bd22bc13a57a352eb5200000186958d0d6a00000403004630440220156399aa18f681feee28511f7bcb3c4e774254637a17a76e49cecf547759afef02203b638e1d5522aae7448a1ce70fcdeda113023077b5af68b032269816db903cc0
 . . . . [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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