data.greymatterlearning.co.uk

Issued by R3

About this certificate

This digital certificate with serial number 04:ae:37:33:09:a9:e2:2a:f7:14:6c:90:7f:c1:96:e1:5a:95 was issued on by Let's Encrypt.

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=data.greymatterlearning.co.uk

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 04:ae:37:33:09:a9:e2:2a:f7:14:6c:90:7f:c1:96:e1:5a:95
Serial Number (int): 407731648114193476330022577858976591993493
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: 66:ae:f8:dc:06:77:47:94:0e:29:fb:c7:1e:db:6d:27:57:d7:6f:c5
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 0c:14:72:9a:56:7c:21:a5:fb:02:46:15:54:10:56:41:d5:44:15:d0
Fingerprint (sha256): 99:84:a2:59:39:55:97:e6:21:5d:4f:87:1e:3a:0e:b0:b4:9f:f5:b6:df:d5:1f:cc:93:66:80:35:7d:a2:b1:5b

Issuing Certificate URL: http://r3.i.lencr.org/

Revocation information

OCSP Server: http://r3.o.lencr.org

Check the revocation status for certificate data.greymatterlearning.co.uk

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for data.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
Client Authentication

Extensions

9 extensions
No unhandled critical extensions

CA Certificate

This is not a CA certificate

Subject Alternative Names

data.greymatterlearning.co.uk

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Certificate

The complete raw certificate details for data.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-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAz5NbGYlx8j3tUQ1lDMsn
lbQiRH5Kpf4jVY0BIkj1pHn3nF1obBY5hCiMorwwL/mNs7ZzfA8vGmMT8pdHhdIA
xynGsgYmyerRisLj0pC3RtkPNDeXGP2fHiCjd8qBcsDeDrOGkpFD3M+8agFvhyVA
XwAd8uGG8TKa2GAmsi0KdGVW+cOnT9bqE0tr+E7rD4L0RBgRO+A9mKc+Rgor2fK0
1WvTG67GDpUCTKTBBlnGVk98xAtvJuK3ww9sH2Wt61xq/zgMXBdZvPdKEKbuyqWk
b1+nzqr1cw5VuV9pC8TZsbswBZN2a9i0GbIrWyebKXfYrjGCt6X1Pt659VhFtRGj
wwIDAQAB
-----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 407731648114193476330022577858976591993493
 . . . . . . . . [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 2023-11-11 23:52:23 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-02-09 23:52:22 +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 'data.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 26203993009977108093605957230818798276627336525382620048719504150791154588679016399268741789218595035158624096429867342948664948757322811159955105445624112206986712251739946014142491008184359368139441905206129292848013006802927175783136636603400889774585252166743430829034253786476185225466197170939704142477355401647699690849022349623196431600065658325145095885104747868327140361941056210268849436769767403222168615274055286163712475643501604643543946648064748098282126432023095318216573425222916201198535855628572114241988472422547069089670200777751970970405209161267565364207084313194761983689446636189224113644483
 . . . . . . . . . . . . . . . . . . . . [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)
							66aef8dc067747940e29fbc71edb6d2757d76fc5
 . . . . . . . . . . . . . . . . [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 (33 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'data.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 (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 (243 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (240 bytes)
							00ee00750048b0e36bdaa647340fe56a02fa9d30eb1c5201cb56dd2c81d9bbbfab39d884730000018bc103f5560000040300463044022036903e96f91429974380395669e18d9f22a799b157b813b8564479668fd7418902207fe1e02b386c4b64f0543f23d44456a16f22999c8d1e09c1253ad91485eb5b1b0075003b5377753e2db9804e8b305b06fe403b67d84fc3f4c7bd000d2d726fe1fad4170000018bc103f570000004030046304402205ef6430e871a4dbc70591d93b59c917cf5267052ef054d1164c7c823b13050de022007fcc8442f6c9dcdd94a02b4b91c90e987ecaee1e4c41f4cc759ae3a4c3dc8ca
 . . . . [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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