greymatterlearning.co.uk
Issued by GTS CA 1P5
About this certificate
This digital certificate with serial number 7b:91:58:7d:fb:56:cd:1f:0d:b7:0b:6a:d3:94:1d:e6 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): 7b:91:58:7d:fb:56:cd:1f:0d:b7:0b:6a:d3:94:1d:e6Serial Number (int): 164249721359383311746955493051211193830
Serial Number lenght: 127 bits, 16 octets
SubjectKeyId: 24:68:43:ba:51:d6:5d:1b:78:09:13:17:d0:c1:8b:82:d4:04:e7:05
AuthorityKeyId: d5:fc:9e:0d:df:1e:ca:dd:08:97:97:6e:2b:c5:5f:c5:2b:f5:ec:b8
Fingerprint (sha1): af:0d:7f:90:d2:af:f5:ab:e9:8d:04:55:c9:a7:f6:b7:18:42:e3:39
Fingerprint (sha256): 34:a6:a6:ab:62:d2:62:ef:3f:3a:84:0b:5f:c7:bf:c2:2c:8b:c8:9e:8f:e0:e4:5a:e2:01:8c:aa:b4:45:ef:1b
Issuing Certificate URL: http://pki.goog/repo/certs/gts1p5.der
Revocation information
OCSP Server: http://ocsp.pki.goog/s/gts1p5/xlKA3MbIM-4CRL Distribution Point: http://crls.pki.goog/gts1p5/332NU9NogWw.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
*.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----- MIIFkDCCBHigAwIBAgIQe5FYfftWzR8Ntwtq05Qd5jANBgkqhkiG9w0BAQsFADBG MQswCQYDVQQGEwJVUzEiMCAGA1UEChMZR29vZ2xlIFRydXN0IFNlcnZpY2VzIExM QzETMBEGA1UEAxMKR1RTIENBIDFQNTAeFw0yMzEyMTMxNzAzNDRaFw0yNDAzMTIx NzAzNDNaMCMxITAfBgNVBAMTGGdyZXltYXR0ZXJsZWFybmluZy5jby51azCCASIw DQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBALhWL5u4bBo2KTWqDrasg9A+Iyuk 7gsXi8ill+/EMD0xlPqdTHdVWA3ict81o6L5AlqXiQ6WCNjsQyNFmIEGgcN/0wf5 1yi2YrcBX8AMcea3N66RJAPoO8PRV02wXpY6C5BdtNV/6xuVO7y8YFujDdatAfqP Gv2HehKj+uPt6efT0atWv/vN92sTrS8MRVF4vsnjVo2mnmlmrjb+oaS5UY+AJktF iqsSNjIjfDlTbsgpa47ALIqjjq78oV2/hCVTCRJoCNZaP0NMnquxp7ZlXxrLdfvC eeSnt/E2ABNO7luwsprsCQvsC4cSGCcqnA2xvuGV53+A3oMkURsIDfXQMNkCAwEA AaOCApswggKXMA4GA1UdDwEB/wQEAwIFoDATBgNVHSUEDDAKBggrBgEFBQcDATAM BgNVHRMBAf8EAjAAMB0GA1UdDgQWBBQkaEO6UdZdG3gJExfQwYuC1ATnBTAfBgNV HSMEGDAWgBTV/J4N3x7K3QiXl24rxV/FK/XsuDB4BggrBgEFBQcBAQRsMGowNQYI KwYBBQUHMAGGKWh0dHA6Ly9vY3NwLnBraS5nb29nL3MvZ3RzMXA1L3hsS0EzTWJJ TS00MDEGCCsGAQUFBzAChiVodHRwOi8vcGtpLmdvb2cvcmVwby9jZXJ0cy9ndHMx cDUuZGVyMD8GA1UdEQQ4MDaCGGdyZXltYXR0ZXJsZWFybmluZy5jby51a4IaKi5n cmV5bWF0dGVybGVhcm5pbmcuY28udWswIQYDVR0gBBowGDAIBgZngQwBAgEwDAYK KwYBBAHWeQIFAzA8BgNVHR8ENTAzMDGgL6AthitodHRwOi8vY3Jscy5wa2kuZ29v Zy9ndHMxcDUvMzMyTlU5Tm9nV3cuY3JsMIIBBAYKKwYBBAHWeQIEAgSB9QSB8gDw AHYA7s3QZNXbGs7FXLedtM0TojKHRny87N7DUUhZRnEftZsAAAGMZFlTFQAABAMA RzBFAiEA5WbSoD72H1I+umo4eUJo2ZjE7S6+Xkznr4kqY3WWejsCIHoOYts3Vesx FEVx4DizW2LKvHVrCCpCrF9lZy4S7/0KAHYA2ra/az+1tiKfm8K7XGvocJFxbLtR hIU0vaQ9MEjX+6sAAAGMZFlTVAAABAMARzBFAiEAvfHKEaoTLlTpjaM0FKAy0O+j eONOpkywTjRUQfsJy2QCIBSqfp2zD1TGQH9r7kONMiPLEZpZodmXoyBzxejMpqGJ MA0GCSqGSIb3DQEBCwUAA4IBAQBy0D1N1QLq2th/Q1U+1EiXp5JwaQZ+mo/3OovC HKf14lRR3uujA2uwNY3f9Qk2CHqc9y9yoUJzEC4D2tfaIJGed+SI55h7bqWmGn1n hjLLw5f2xJxglUZtSWqAln70ImPh7cvh0GBFi4B6TzRHTy81ed09O6I/K9dy0rHm czp3bRWU8zockCQNlHui5F2T7xUCsCHHfzT56zuUf7dQkj/JYWhXmfHcM3e/YZXg sTqt1d6tG4fYiU/k7pWYvvxyikLeO8mPBV6HqIR2b7uUKDeg4nY0vIJGGEqBCqhT +TWWxcKIO09ay7NfcRntDrlRkdseg8i/JKTIStYU66X6lE5R -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAuFYvm7hsGjYpNaoOtqyD 0D4jK6TuCxeLyKWX78QwPTGU+p1Md1VYDeJy3zWjovkCWpeJDpYI2OxDI0WYgQaB w3/TB/nXKLZitwFfwAxx5rc3rpEkA+g7w9FXTbBeljoLkF201X/rG5U7vLxgW6MN 1q0B+o8a/Yd6EqP64+3p59PRq1a/+833axOtLwxFUXi+yeNWjaaeaWauNv6hpLlR j4AmS0WKqxI2MiN8OVNuyClrjsAsiqOOrvyhXb+EJVMJEmgI1lo/Q0yeq7GntmVf Gst1+8J55Ke38TYAE07uW7CymuwJC+wLhxIYJyqcDbG+4ZXnf4DegyRRGwgN9dAw 2QIDAQAB -----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 164249721359383311746955493051211193830 . . . . . . . . [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 2023-12-13 17:03:44 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-03-12 17:03:43 +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 23270347999482586492906048508332859797978470264227878569671892281984902465556643130731212344234631553184532074776836121836049272386386980179800039839644936622611494890053599853306950479242792212273886258325465764172730392002665021938283618342891173297650835750710947057498176857496797735530983211547628268112537453227149953950768034284768791731520433039073867965981179945045345729094375360032130731731557795632071670028472821094352664070938237555207685233657638076150525683613194345766294950159629530067268408208603091970217949514150413090959743707907934837407779224115755509096882877965805327309366332336097520005337 . . . . . . . . . . . . . . . . . . . . [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) 246843ba51d65d1b78091317d0c18b82d404e705 . . . . . . . . . . . . . . . . [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/xlKA3MbIM-4' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [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/gts1p5/332NU9NogWw.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) 00f0007600eecdd064d5db1acec55cb79db4cd13a23287467cbcecdec351485946711fb59b0000018c645953150000040300473045022100e566d2a03ef61f523eba6a38794268d998c4ed2ebe5e4ce7af892a6375967a3b02207a0e62db3755eb31144571e038b35b62cabc756b082a42ac5f65672e12effd0a007600dab6bf6b3fb5b6229f9bc2bb5c6be87091716cbb51848534bda43d3048d7fbab0000018c645953540000040300473045022100bdf1ca11aa132e54e98da33414a032d0efa378e34ea64cb04e345441fb09cb64022014aa7e9db30f54c6407f6bee438d3223cb119a59a1d997a32073c5e8cca6a189 . . . . [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) 0072d03d4dd502eadad87f43553ed44897a7927069067e9a8ff73a8bc21ca7f5e25451deeba3036bb0358ddff50936087a9cf72f72a14273102e03dad7da20919e77e488e7987b6ea5a61a7d678632cbc397f6c49c6095466d496a80967ef42263e1edcbe1d060458b807a4f34474f2f3579dd3d3ba23f2bd772d2b1e6733a776d1594f33a1c90240d947ba2e45d93ef1502b021c77f34f9eb3b947fb750923fc961685799f1dc3377bf6195e0b13aadd5dead1b87d8894fe4ee9598befc728a42de3bc98f055e87a884766fbb942837a0e27634bc8246184a810aa853f93596c5c2883b4f5acbb35f7119ed0eb95191db1e83c8bf24a4c84ad614eba5fa944e51