greymatterlearning.co.uk

Issued by GTS CA 1P5

About this certificate

This digital certificate with serial number 04:87:0d:44:f2:00:88:f6:0e:32:81:80:98:2f:b1:28 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:
  • Subscriber Certificate: commonName is deprecated. (BRs: 7.1.4.2.2)

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): 04:87:0d:44:f2:00:88:f6:0e:32:81:80:98:2f:b1:28
Serial Number (int): 6018141192777782820686554411192791336
Serial Number lenght: 123 bits, 16 octets

SubjectKeyId: c7:75:a7:74:53:c3:f7:ee:06:4d:f5:f8:66:f0:cc:82:1f:fb:67:cb
AuthorityKeyId: d5:fc:9e:0d:df:1e:ca:dd:08:97:97:6e:2b:c5:5f:c5:2b:f5:ec:b8

Fingerprint (sha1): 59:2c:b9:08:0a:48:c3:a9:ae:29:db:ac:3b:8e:33:4f:ed:b2:de:44
Fingerprint (sha256): b1:80:26:77:57:26:8a:9a:1a:95:eb:f5:cf:6d:1b:67:df:b0:26:de:98:45:23:ce:3a:65:78:12:96:3d:e8:e3

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

Revocation information

OCSP Server: http://ocsp.pki.goog/s/gts1p5/nZFLOSSDvic
CRL Distribution Point: http://crls.pki.goog/gts1p5/1eLAQ7_rI1Q.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-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAwFTa6jO6d9YTdsA+r2fP
TeXKA0mM0dFAO0UyvfJ5UK9MTRStlB5ky3wlIOnSJA1hO4fGpi6GMplSUEsBgcp1
lTbXCtpjtQr0RhAs4T9Km5tCAQQLyJB8oJKmGHdmTw48bBElzyzuIG8VE5mxABvR
e0aE0/dHKwjFIFgxhpUiR0w1QLHqAPqkIeL5SJ8mjiOmbNYwULlJxEvyZ4dnoC+C
zq+ACNiV9deEr3Ik4uA4rqdwFiBCrpu4zrKpsBe/Vk6r+zOVj01PEQGA1oFdeoAW
U+DyXZ86o9xbvOQXqMdM6uLHU+lx2Lvli7skzb3/bJLFZD7IwqYdvIuwybbLhHaN
vQIDAQAB
-----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 6018141192777782820686554411192791336
 . . . . . . . . [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 2023-08-17 13:41:43 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2023-11-15 13:41:42 +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 24279598180647178267751624117573651893979583340333989837050870119244346352629101149303538539558155225720821083548480643166685123281407398335039503033455402157199501804702776079012360023591495692112188882009025331902107135481704352661084862963575292803067815455443457146876444635177815462264410286113101064036602045710615006531000821486478456828611466020377575013340240266165833095228393307565740678454846429154077471081650494274798623155995516865782373475018339943534770000013922842001120307377971725839053602417735266126860157985197533071543572626719523540111435993531841479391050126536024751868048876428836998647229
 . . . . . . . . . . . . . . . . . . . . [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)
							c775a77453c3f7ee064df5f866f0cc821ffb67cb
 . . . . . . . . . . . . . . . . [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/nZFLOSSDvic'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [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/gts1p5/1eLAQ7_rI1Q.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 (245 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (242 bytes)
							00f00077007a328c54d8b72db620ea38e0521ee98416703213854d3bd22bc13a57a352eb520000018a03f1f64d00000403004830460221009fa1d8facb1278403a5b161e5130ec14a8f404dd2bee5dbb2ff7fee4ce883a80022100dff7636eb3f5cf72ef7dacdf3c79acffdf518dab5ec8351ddff9a0771088a6db007500e83ed0da3ef5063532e75728bc896bc903d3cbd1116beceb69e1777d6d06bd6e0000018a03f1f618000004030046304402206563e601ab6431df2b55964bf771d33cf25da96422a23427d222cc61c71973e002203ca46b5456457b44f912a7a866a15d152de1db4a5e3bd28c14a3bd38a70d75e2
 . . . . [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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