greymatterlearning.co.uk

Issued by GTS CA 1P5

About this certificate

This digital certificate with serial number 4d:98:12:b3:04:53:a9:ff:11:a8:6d:c2:47:34:4f:70 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): 4d:98:12:b3:04:53:a9:ff:11:a8:6d:c2:47:34:4f:70
Serial Number (int): 103140164064488855463954965216812617584
Serial Number lenght: 127 bits, 16 octets

SubjectKeyId: a5:b0:5d:09:4b:47:c8:d9:a1:4e:66:27:60:46:c5:f1:e8:13:41:3b
AuthorityKeyId: d5:fc:9e:0d:df:1e:ca:dd:08:97:97:6e:2b:c5:5f:c5:2b:f5:ec:b8

Fingerprint (sha1): 5b:a3:8e:f9:1e:12:5e:3f:54:fa:aa:7c:ff:35:26:5f:04:47:71:fe
Fingerprint (sha256): c5:ef:84:f6:26:87:eb:86:45:a0:50:39:01:52:e0:57:15:94:fa:3c:f8:08:ac:5d:88:46:07:2a:52:c3:93:d5

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

Revocation information

OCSP Server: http://ocsp.pki.goog/s/gts1p5/dx1zijcnK4s
CRL Distribution Point: http://crls.pki.goog/gts1p5/QAbdIRPj4FY.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-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAt80wxgNnLG/UIcMRWA7G
uq6aiOUzyMkIvzmfdsP/eeOKLr0ERKjyFbpvKRE/mwmxDGTrbsk3Z1C9cFeNYhRP
UgcpgI10eaouNws0G2CiWVyww03vlGwTfcwlPbK9hmzAcJzZ1IIWUm5PW2qME80F
dBcRpJ/rxM9s/nvJbBLS8nV3HLW6LSniAVf2eV5ogiAJB9mwOQmkmLduZezd8zD6
g7YpSC9nyLorGls3krurCmWRY0nRzcZuw/NxwJr5H//rV9wUwOmmHLJKKXurluf2
52AilJfuK1bgNTZ12n6xIvrYglJsEHG5F/Bn9zOk4WIy0tbpFWo+kVF0rYnTo7i5
UQIDAQAB
-----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 103140164064488855463954965216812617584
 . . . . . . . . [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 2024-02-13 20:13:09 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-05-13 20:13:08 +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 23202793026062457942441691908203666293268830861706165685801965485510831816914642636209882261249423153541507546409594555833270696419912120196284774782414554808687991869671548956052616108262620988686584952793808653231656236829037895982290544794322481710819503620537461768909969971710350313314015804661270807689291521213741337977382993132371029934608925252208563093894355489297809941735419882064745381494782814795323517450560120061262408828723458970718087092124808553378274564849424608704848152710606926036941756882599294251667664790706553604972356404149306721158015908638275314967635949696218431311592085731049658169681
 . . . . . . . . . . . . . . . . . . . . [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)
							a5b05d094b47c8d9a14e66276046c5f1e813413b
 . . . . . . . . . . . . . . . . [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/dx1zijcnK4s'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [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/QAbdIRPj4FY.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 (244 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (241 bytes)
							00ef00750076ff883f0ab6fb9551c261ccf587ba34b4a4cdbb29dc68420a9fe6674c5a3a740000018da4510790000004030046304402201102e95dbcb1626ce72c0c8cf5aa3884d341520b12d8a6507507e2fc585b6f7802201e63a1a3c0333194b50d8dfabaf89540d76ea9fed89822a16ebb3f12677c526a00760048b0e36bdaa647340fe56a02fa9d30eb1c5201cb56dd2c81d9bbbfab39d884730000018da4510782000004030047304502202ce1dab7d2b1bca0a14c41eaba09b94da63f7080e0b21811fc4be8fba29b2400022100821b541bd12561784e90cea635ede7f820d6f56349a483772cecdf7b8453e792
 . . . . [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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