greymatterlearning.co.uk

Issued by GTS CA 1P5

About this certificate

This digital certificate with serial number 2f:86:18:a7:f7:06:b5:94:13:60:75:93:2a:5c:f9:7c was issued on by Google Trust Services LLC.

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:
  • 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=greymatterlearning.co.uk

Google Trust Services LLC

Organization: Google Trust Services LLC
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 2f:86:18:a7:f7:06:b5:94:13:60:75:93:2a:5c:f9:7c
Serial Number (int): 63169983666319248911574258421444966780
Serial Number lenght: 126 bits, 16 octets

SubjectKeyId: 1d:e0:29:a0:e3:dd:ae:7a:d9:fd:5b:d3:af:f1:bb:cb:27:66:6e:29
AuthorityKeyId: d5:fc:9e:0d:df:1e:ca:dd:08:97:97:6e:2b:c5:5f:c5:2b:f5:ec:b8

Fingerprint (sha1): e0:cd:0f:3a:a5:6b:2b:92:e7:3c:e9:d0:6e:aa:85:06:f0:15:2c:5d
Fingerprint (sha256): f6:d4:79:d1:db:4e:52:29:e8:4c:d9:b7:64:8d:df:a8:63:02:f7:09:82:db:e1:cf:7f:66:ce:34:61:ae:cb:35

Issuing Certificate URL: http://pki.goog/repo/certs/gts1p5.der

Revocation information

OCSP Server: http://ocsp.pki.goog/s/gts1p5/VRBPwRRiMN8
CRL Distribution Point: http://crls.pki.goog/gts1p5/C7VLY2UpjTc.crl

Check the revocation status for certificate greymatterlearning.co.uk

2

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for greymatterlearning.co.uk

Public Key Algorithm

RSA

Key Size

2048

Signature Algorithm

SHA256 with RSA

Key Usage

Digital Signature
Key Encipherment

Extended Key Usages

Server Authentication

Extensions

10 extensions
No unhandled critical extensions

CA Certificate

This is not a CA certificate

Subject Alternative Names

greymatterlearning.co.uk
*.greymatterlearning.co.uk

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Certificate

The complete raw certificate details for greymatterlearning.co.uk in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAnXlT3eW9TDI5tU5qfHUj
PJRgpLGarNZl3cmjMi5csDezuKPfpAdXj0C9i98eOTTVPL0KXOpdctsT5TXZmPKw
F6cXXEjbYmjJw3e286Mv1wjRQSHCEL++PgxfirWDoY8TP2oHr8Ml+1qBIfSMo3cW
bn5EcS9pujrzeypo7o0f/zoKEmYdjKVHOLQ8+XM3gNvvfdGcYwVRW5tGI0jQ3cA7
2I/kCsojG7MkspZEKHoY7aEQCImdGjC0T0/R/p18jGCL2a2abbFqrc9Gw6hVxECr
ZGUHXx2ZlSoxBDuCy7ZFRG1f+DncjAQFWvg891SwJ2VYtoeVGSM8rXBoYUBuHcIy
aQIDAQAB
-----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 63169983666319248911574258421444966780
 . . . . . . . . [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 'Google Trust Services LLC'
 . . . . . . . . . . . . [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 'GTS CA 1P5'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2023-10-15 15:36:10 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-01-13 15:36:09 +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 'greymatterlearning.co.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 19879242751369761323150619088039914068677528923361975727975167376734945903166873910802101706900762476025644305681201422295258986334396453954719461808600114021135692595949855588470401713310479146088774802153799851984819051199054420430597274005075873600248587824073772666079918118458269198846833555829671546088629840509365668496215186056820037619614784884278018508927527327147591146112848367761440732884563251520379726113156730670014567270712776679129756852969244738999314781197837978726299444560105465050708375743393766342564461558233829228918583110282009997062755722193973338136367315176387586984534717627943448883817
 . . . . . . . . . . . . . . . . . . . . [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 (12 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: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)
							1de029a0e3ddae7ad9fd5bd3aff1bbcb27666e29
 . . . . . . . . . . . . . . . . [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 d5fc9e0ddf1ecadd0897976e2bc55fc52bf5ecb8
 . . . . . . . . . . . . . . . . [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 (108 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://ocsp.pki.goog/s/gts1p5/VRBPwRRiMN8'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [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://pki.goog/repo/certs/gts1p5.der'
 . . . . . . . . . . . . . . . . [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 (56 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'greymatterlearning.co.uk'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String '*.greymatterlearning.co.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 (26 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 1.3.6.1.4.1.11129.2.5.3
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.31 (cRLDistributionPoints)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (53 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|true] OtherName 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|true] OtherName 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://crls.pki.goog/gts1p5/C7VLY2UpjTc.crl'
 . . . . . . . . . . . . . . . . [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)
							00f1007600dab6bf6b3fb5b6229f9bc2bb5c6be87091716cbb51848534bda43d3048d7fbab0000018b3431f3570000040300473045022100c8590f53e5aae49e2156f6c4254b6af63b982bd1b365df6acd5eca381187b9590220512cfb52df1666faf950d92e4f6ceeb8e3b672f92a19d0e9e73ebf44783c42b8007700eecdd064d5db1acec55cb79db4cd13a23287467cbcecdec351485946711fb59b0000018b3431f31b0000040300483046022100a9299be8c0f43de63c417f469d2ce112d453cf5ad6d6c05b3f1589192f62030a022100a919386a61f546b92af45799929243e58a330170075675729209bbceb3583290
 . . . . [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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