yushikai.co.uk
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:43:b2:70:45:ff:bf:ee:15:42:16:63:43:3a:ab:af:aa:bc was issued on by Let's Encrypt.
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=yushikai.co.uk
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 03:43:b2:70:45:ff:bf:ee:15:42:16:63:43:3a:ab:af:aa:bcSerial Number (int): 284372961919230331472701475262567466117820
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: 18:9a:5d:59:e9:7e:4d:08:b3:86:2b:86:de:32:46:c5:16:0f:5d:2f
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): 79:19:84:4c:04:8c:b1:26:9c:d3:08:5c:57:ef:b7:54:2d:e1:de:92
Fingerprint (sha256): 46:c0:53:c3:90:0d:e5:c4:17:b8:88:bd:32:e5:a3:c3:d2:04:1a:49:27:d2:6f:6c:22:4c:1e:b7:8e:ab:4d:4c
Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/
Revocation information
OCSP Server: http://ocsp.int-x3.letsencrypt.orgCheck the revocation status for certificate yushikai.co.uk
2
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for yushikai.co.uk
Public Key Algorithm
RSA
Key Size
4096
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
www.yushikai.co.uk
yushikai.co.uk
yushikai.co.uk
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yushikai.co.uk
yushikai.co.uk
www.yushikai.co.uk
yushikai.co.uk
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yushikai.co.uk
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yushikai.co.uk
Certificate
The complete raw certificate details for yushikai.co.uk in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIGaTCCBVGgAwIBAgISA0OycEX/v+4VQhZjQzqrr6q8MA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xOTAxMDYwMjUyNTFaFw0x OTA0MDYwMjUyNTFaMBkxFzAVBgNVBAMTDnl1c2hpa2FpLmNvLnVrMIICIjANBgkq hkiG9w0BAQEFAAOCAg8AMIICCgKCAgEA0fALp00P34Z8Bpfdf3L9b6RMifeDUpxZ sTRdGDZmvFwSSxbIVLPPpHP4eqne4BOCRdYEgbVze4jZ5lzUJrIERNowN/Uukl0R 5f/fNEh6Pc+Atfj3wNu5FkQ340nkYCB5XUuhmkymEP5rfuXdhdaoq+Xr7XQ++kbV 3BU2nRSo5gIRgXiC6B0pjEsMc6rv3YxvVHeLR2Pa0s7an78Sc0Mq6B0hQQK3NLal Hkvt8vBkr0TgdJPjFQBbxZPIvaxTOu/oIh3yGJ1ahG5kPOzXLWr9TvNU56qyHiOc VaP0El8YFRsxRbQuKfIDsgNU2BEj+/UIyz7nV9lK8XVqpoL+pgRvJGKwMSpb5tgm sAxKRSZuRMDrkhXXuv0y8Dq8ezxXz65MuK3c4I+qD6S4QT/huBe9i/wnxVd7z59P FfSXEVOLlxwOv3xuLxJBVfp24d5JFBThhWZbQ/q3kr58a6Buyn2GiAAxK5KnlW+6 FsHyqhhuuLEd0zWr40rjC5O2YWo3+m4khT2XElioG2LkPw9oLl68MLDj6lZPZKy+ Syk/iW5ydDDtJoqCxDr7a2a5nkzDoZvm4wZbkW6HsGqK8Vrl5SPdGPxD+f+JqqJz cQV8vxMYF60562xhoq4G7X/rsutHfY9dZmELAXo89U1mmMOcOqQzOor3gmbkNwlp prZEStkQan8CAwEAAaOCAngwggJ0MA4GA1UdDwEB/wQEAwIFoDAdBgNVHSUEFjAU BggrBgEFBQcDAQYIKwYBBQUHAwIwDAYDVR0TAQH/BAIwADAdBgNVHQ4EFgQUGJpd Wel+TQizhiuG3jJGxRYPXS8wHwYDVR0jBBgwFoAUqEpqYwR93brm0Tm3pkVl7/Oo 7KEwbwYIKwYBBQUHAQEEYzBhMC4GCCsGAQUFBzABhiJodHRwOi8vb2NzcC5pbnQt eDMubGV0c2VuY3J5cHQub3JnMC8GCCsGAQUFBzAChiNodHRwOi8vY2VydC5pbnQt eDMubGV0c2VuY3J5cHQub3JnLzAtBgNVHREEJjAkghJ3d3cueXVzaGlrYWkuY28u dWuCDnl1c2hpa2FpLmNvLnVrMEwGA1UdIARFMEMwCAYGZ4EMAQIBMDcGCysGAQQB gt8TAQEBMCgwJgYIKwYBBQUHAgEWGmh0dHA6Ly9jcHMubGV0c2VuY3J5cHQub3Jn MIIBBQYKKwYBBAHWeQIEAgSB9gSB8wDxAHcA4mlLribo6UAJ6IYbtjuD1D7n/nSI +6SPKJMBnd3x2/4AAAFoIUq6iQAABAMASDBGAiEAuhRdfTHYfpIpIZM045IDQX+a baQlVF24KsxPqjQlTtECIQC3bFznnh2yPj4Ywn/Er0pubmVRU2Un8bFraJJTvcso MgB2ACk8UZZUyDlluqpQ/FgH1Ldvv1h6KXLcpMMM9OVFR/R4AAABaCFKuooAAAQD AEcwRQIgU79zzU3fWoG9X2lxmyfBOMY75l/jFA0lj6+kjfi3+esCIQCdzfHM/6u8 hJdBD24lt8a/farrRS3LBuruNGQGpRGeSzANBgkqhkiG9w0BAQsFAAOCAQEAH61M wwwlohdJmzJYaeB6wLbfHMwTdaI9H5O0vEo1I5ATyABEpfysx8Oy1YWh0PtHzetl TU6NNPGjMaGqddlT+nL1g649+toKdstB8lX+QAXGlUey15jtaYR5zolFu0jha4sC tDDPeB9TT1pUPM8BrKaAPRxNsGHXWTb/UPl8GNuGR14dNfkGKdCqGnMnQWV30LKS uNkBu5GZbAQJBSupuPzTEuYDts+RsdUz7j1tJeKNfS7V4OFxPd/MrbdR+sK0VgVr /66MEx3le+6zd2H/ZsBHs/5s8IAjTrdnWZQ0tUHcdOw42CTThDj4qo+kXMuMdS/V v/HK7HuCfDiBSq/l0g== -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEA0fALp00P34Z8Bpfdf3L9 b6RMifeDUpxZsTRdGDZmvFwSSxbIVLPPpHP4eqne4BOCRdYEgbVze4jZ5lzUJrIE RNowN/Uukl0R5f/fNEh6Pc+Atfj3wNu5FkQ340nkYCB5XUuhmkymEP5rfuXdhdao q+Xr7XQ++kbV3BU2nRSo5gIRgXiC6B0pjEsMc6rv3YxvVHeLR2Pa0s7an78Sc0Mq 6B0hQQK3NLalHkvt8vBkr0TgdJPjFQBbxZPIvaxTOu/oIh3yGJ1ahG5kPOzXLWr9 TvNU56qyHiOcVaP0El8YFRsxRbQuKfIDsgNU2BEj+/UIyz7nV9lK8XVqpoL+pgRv JGKwMSpb5tgmsAxKRSZuRMDrkhXXuv0y8Dq8ezxXz65MuK3c4I+qD6S4QT/huBe9 i/wnxVd7z59PFfSXEVOLlxwOv3xuLxJBVfp24d5JFBThhWZbQ/q3kr58a6Buyn2G iAAxK5KnlW+6FsHyqhhuuLEd0zWr40rjC5O2YWo3+m4khT2XElioG2LkPw9oLl68 MLDj6lZPZKy+Syk/iW5ydDDtJoqCxDr7a2a5nkzDoZvm4wZbkW6HsGqK8Vrl5SPd GPxD+f+JqqJzcQV8vxMYF60562xhoq4G7X/rsutHfY9dZmELAXo89U1mmMOcOqQz Oor3gmbkNwlpprZEStkQan8CAwEAAQ== -----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 284372961919230331472701475262567466117820 . . . . . . . . [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 'Let's Encrypt Authority X3' . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-01-06 02:52:51 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-04-06 02:52:51 +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 'yushikai.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 (4208 bits) . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 856471001966562947411937795332365848298980927990322587610794194812936796090066877218516279572975598982494077009503414885750549292648198866292858742757696858945198738660849124028623541560940284457964295393983320997496679406685857828843393187723758802648811710429890084391611000197832422656655947170097857744781985458908624937156317114416726704249709655908188784324281622113058825884920960050174082730218186263670042339182359043412769226384686386887649996912799407502749653706320537042353598273776522863582350344753748633365027965623203136818373803230975200400625405537178497352236354203319341791646229413053192640098466277187484222955399901985919383804081332342593038786095346937170209679637451162267668616397753203814942825645867526797463203009852208530702622383892901605348131328789640381516458814138289286289243578116302878418287059812366429602307036568928425644063014179409679158150715068612676796584515782908470764025884538191726029661493633646325732711914446936420752074253055315307255461353781238647231800822696240920109541497963569420078226647180674810982388343935404752944434219487886860899131964054771640008913937073222217045607339253159633173318945229638708229642960849866515559387651903642562605847303516522011349457332863 . . . . . . . . . . . . . . . . . . . . [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) 189a5d59e97e4d08b3862b86de3246c5160f5d2f . . . . . . . . . . . . . . . . [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 a84a6a63047dddbae6d139b7a64565eff3a8eca1 . . . . . . . . . . . . . . . . [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 (99 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.int-x3.letsencrypt.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://cert.int-x3.letsencrypt.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 (38 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.yushikai.co.uk' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'yushikai.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 (246 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (243 bytes) 00f1007700e2694bae26e8e94009e8861bb63b83d43ee7fe7488fba48f2893019dddf1dbfe00000168214aba890000040300483046022100ba145d7d31d87e9229219334e39203417f9a6da425545db82acc4faa34254ed1022100b76c5ce79e1db23e3e18c27fc4af4a6e6e6551536527f1b16b689253bdcb2832007600293c519654c83965baaa50fc5807d4b76fbf587a2972dca4c30cf4e54547f47800000168214aba8a0000040300473045022053bf73cd4ddf5a81bd5f69719b27c138c63be65fe3140d258fafa48df8b7f9eb0221009dcdf1ccffabbc8497410f6e25b7c6bf7daaeb452dcb06eaee346406a5119e4b . . . . [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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