app.staging.greymatterlearning.co.uk

Issued by R3

About this certificate

This digital certificate with serial number 04:0c:58:ab:6b:ed:2c:ef:f5:cd:7f:5e:ba:bc:c3:5e:c3:d1 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:
  • Subscriber Certificate: commonName is deprecated. (BRs: 7.1.4.2.2)

Certificate Subject

CN=app.staging.greymatterlearning.co.uk

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 04:0c:58:ab:6b:ed:2c:ef:f5:cd:7f:5e:ba:bc:c3:5e:c3:d1
Serial Number (int): 352650394265492939741479066303495340475345
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: 96:4b:c5:1d:f7:55:2a:f0:7d:94:d7:0b:47:30:1a:cb:cd:94:54:5f
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): a4:89:e2:91:23:80:71:7c:de:9d:ed:13:ff:47:a5:b0:26:ef:ae:1c
Fingerprint (sha256): d0:41:9a:34:8c:5b:b2:48:6a:81:29:0b:79:10:40:b6:e4:87:05:3e:ca:f6:11:81:6c:71:f8:98:46:39:1d:b1

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

Revocation information

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

Check the revocation status for certificate app.staging.greymatterlearning.co.uk

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for app.staging.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

app.staging.greymatterlearning.co.uk

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Certificate

The complete raw certificate details for app.staging.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-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAs0bHG0X71xrpAmZVDvxD
l9No24ISeC+dGb67HBPRE3L0HEJVwR4l6dVvFmE11/Eh51rZR9l7OT1FbDdbluKt
va7UOngaym2jkd/eblkcD/oi7HtVpXvUE0m8a3C/Et2kbfGH9miPdP6Su2LqqJxm
RrfRlr7kHPY4VTvWFlYshAnr0YapvEZKw1VXQJKuvfC6FATXX7tp7OOmsctm/aRQ
ox5ZXFtMEXd5lLSbe/UGpWIITbVjMogP9dRb2akRQUrVUXsBO4fxmTDYICa47lyW
lAnXEAp8t+GvoAXH8NGAPqpHDOHOsmmvU0Jl2RBL0zml2+mlN4z0BHtgKYPrB0jo
HQIDAQAB
-----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 352650394265492939741479066303495340475345
 . . . . . . . . [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 2023-03-24 01:23:38 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2023-06-22 01:23:37 +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 'app.staging.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 22631558403143884258485803257942454374819505425866133603331001450893872905177983348033720126572381898337329668912362449183488742602679668462353225849299786746317574625470812956442264442225974402900384042632776234403791950993758401059036564659525018343422674688496462959791447009630144152753451245652571988125921569034948716055498951120241778083578487132830074555605124322042249871677938769979228031422527621122558316408812504121808414451672774805390506810385690609813899351419071956845046336068502602143876218790488210222077194798473621749232316383610753417041352004443199347547660099814665225153309474811217005045789
 . . . . . . . . . . . . . . . . . . . . [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)
							964bc51df7552af07d94d70b47301acbcd94545f
 . . . . . . . . . . . . . . . . [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 'app.staging.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 (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)
							00ee0075007a328c54d8b72db620ea38e0521ee98416703213854d3bd22bc13a57a352eb5200000187116dc33600000403004630440220614aa3546b3b97afa93143e23e3bdc1e89bfe4b5b41db38f9a4504c4f422f570022061ebf47a59a8c816e8f4ca0af947e4bac3fe7994307cbc6cc09969c4960354b6007500adf7befa7cff10c88b9d3d9c1e3e186ab467295dcfb10c24ca858634ebdc828a00000187116dc354000004030046304402200c3bc0b0a17efda7f7bea82aaaa6aafe66d8937eff3610fa4ea8f0c8c90f331402205ef4e638a4302b84c5d3d3acc379b7fbeb2e0563644226c43a8db8d3f986de21
 . . . . [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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