yushikai.co.uk
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:38:6a:b8:c2:12:59:6e:ab:25:2f:52:b3:da:79:b5:9b:85 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): 03:38:6a:b8:c2:12:59:6e:ab:25:2f:52:b3:da:79:b5:9b:85Serial Number (int): 280534527829269713374237815413322947074949
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: 19:da:37:3a:7b:1a:b8:d4:19:ca:6c:05:f8:0b:67:9d:95:6c:b8:24
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): 62:be:fc:16:f3:c8:03:f0:32:ce:34:fb:88:81:be:18:b5:bf:43:f5
Fingerprint (sha256): 1e:b1:86:c2:8b:78:09:23:fd:7b:e5:a1:98:70:05:69:0d:b8:a9:87:bf:7a:c0:e9:a2:9c:fe:d8:61:6f:04:69
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
yushikai.co.uk
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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----- MIIGaTCCBVGgAwIBAgISAzhquMISWW6rJS9Ss9p5tZuFMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xOTA3MTIwMTM4MDBaFw0x OTEwMTAwMTM4MDBaMBkxFzAVBgNVBAMTDnl1c2hpa2FpLmNvLnVrMIICIjANBgkq hkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAu41a9w4k2SxgiwkMMYFZjllbvTG1/1u0 92wnnzG64zb2UCLpR2b938vQ+/qBZgjJBpn2LP40nA/m4M+VTLsarAIjyDxkkNmy PteoFWDbnncIsy1YopQfQnXRZ3he43HoeVQ5pT7K11kqd5KuYFfHwJ2GwFG+oW7l kwmICzecxCQw6d/jU7Q0W2g4PK1kXuTvNGcoXT2MM6etdVnEtx/iqswSaExmLske 8xI5H74ncFNqCcR7OwgsowNGh+RuLgzezaWOXILzgc6DvN/NHDJjKFNzHGCxxdh5 6puWDeXtkbAyqLCEIrCNTzyJVPpEK1ognBu511lPOvrIq9ssIZmbG63Pnbi/MErL oGDVJhYQGeTRf5bH2bLgCkW1/tchZ7j6v+AVdJbO4HIwwWx/2IAqmlW8eM30phZd txORR53ooZtCNbipZoj4jrozl9PI7TVrxGsYMxDP4YCYFPM5+KzbrfADC5BdIzal OTPgwZI7PtYp45jxTfO1EUenxp4MimwmUKBDtGpNvjI1acLIhRkc6fNMkWX4K6qh ku35eocAevv+F5DtiRlKPTnMcUTBvD50mdmmiv5mGeKJEvS9F2+WjJR/3rJdyP/N ZMsHdgMV2PyiKkwMTMzr/Y0D3SWmZm1glKva4RPVCcDK1x4VVWUJiyj93iAactfj BauXWTK+8H0CAwEAAaOCAngwggJ0MA4GA1UdDwEB/wQEAwIFoDAdBgNVHSUEFjAU BggrBgEFBQcDAQYIKwYBBQUHAwIwDAYDVR0TAQH/BAIwADAdBgNVHQ4EFgQUGdo3 OnsauNQZymwF+AtnnZVsuCQwHwYDVR0jBBgwFoAUqEpqYwR93brm0Tm3pkVl7/Oo 7KEwbwYIKwYBBQUHAQEEYzBhMC4GCCsGAQUFBzABhiJodHRwOi8vb2NzcC5pbnQt eDMubGV0c2VuY3J5cHQub3JnMC8GCCsGAQUFBzAChiNodHRwOi8vY2VydC5pbnQt eDMubGV0c2VuY3J5cHQub3JnLzAtBgNVHREEJjAkghJ3d3cueXVzaGlrYWkuY28u dWuCDnl1c2hpa2FpLmNvLnVrMEwGA1UdIARFMEMwCAYGZ4EMAQIBMDcGCysGAQQB gt8TAQEBMCgwJgYIKwYBBQUHAgEWGmh0dHA6Ly9jcHMubGV0c2VuY3J5cHQub3Jn MIIBBQYKKwYBBAHWeQIEAgSB9gSB8wDxAHcAY/Lbzeg7zCzPC3KEJ1drM6SNYXeP vXWmOLHHaFRL2I0AAAFr5AtkmQAABAMASDBGAiEA1jYHAClchMiPL3fZqSzLwmCf z8CTG90Q345awSe0eFACIQDeTlsdgTmAJ3fERKqzniJxMPjgp9l5nYfsAkK6/iSo yAB2AG9Tdqwx8DEZ2JkApFEV/3cVHBHZAsEAKQaNsgiaN9kTAAABa+QLZO8AAAQD AEcwRQIhAMzdIt7IOMFrPvNop6oori1uaqnjLgttKuFPwYMxbxcEAiBKiXVLIoBd fPQQu9Ah0dEYcGjTCR2N9jLzLUl1BB0sejANBgkqhkiG9w0BAQsFAAOCAQEAXLHR oVaVQuU0BglVcVye1akAvT4pBVzL2UczJ4obEy0Ihccb8EQ3vAF+45B9vtYMfLQ2 qHpvNeDGrqX84yXxfaMTu8Q8Ezgd8sBp3VlcUU0+ByDKtZ2NT8CsOzJCkWAEztBk mGZsWzLUP7AnOAx/87LTTCcMenwgMKyGUkm8UttYs1idrj7HxCvT+IPbcJSXmuMX fiEhrweTRvYz88Q2xmGzFRZNELqRo8MIPRMXUzjhUOAmvRVHj1/ESmaUFqKL6azV pyWrR6TwTeaZyZVo8JVt6YFOu3Xp+GiFY7yv1bREH7KUbmTp0pGZ2V3bmEQRU+Fj rBaYp2JYHkmnFDWdnw== -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAu41a9w4k2SxgiwkMMYFZ jllbvTG1/1u092wnnzG64zb2UCLpR2b938vQ+/qBZgjJBpn2LP40nA/m4M+VTLsa rAIjyDxkkNmyPteoFWDbnncIsy1YopQfQnXRZ3he43HoeVQ5pT7K11kqd5KuYFfH wJ2GwFG+oW7lkwmICzecxCQw6d/jU7Q0W2g4PK1kXuTvNGcoXT2MM6etdVnEtx/i qswSaExmLske8xI5H74ncFNqCcR7OwgsowNGh+RuLgzezaWOXILzgc6DvN/NHDJj KFNzHGCxxdh56puWDeXtkbAyqLCEIrCNTzyJVPpEK1ognBu511lPOvrIq9ssIZmb G63Pnbi/MErLoGDVJhYQGeTRf5bH2bLgCkW1/tchZ7j6v+AVdJbO4HIwwWx/2IAq mlW8eM30phZdtxORR53ooZtCNbipZoj4jrozl9PI7TVrxGsYMxDP4YCYFPM5+Kzb rfADC5BdIzalOTPgwZI7PtYp45jxTfO1EUenxp4MimwmUKBDtGpNvjI1acLIhRkc 6fNMkWX4K6qhku35eocAevv+F5DtiRlKPTnMcUTBvD50mdmmiv5mGeKJEvS9F2+W jJR/3rJdyP/NZMsHdgMV2PyiKkwMTMzr/Y0D3SWmZm1glKva4RPVCcDK1x4VVWUJ iyj93iAactfjBauXWTK+8H0CAwEAAQ== -----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 280534527829269713374237815413322947074949 . . . . . . . . [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 2019-07-12 01:38:00 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-10-10 01:38:00 +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 765146094793020028947144394701543515573299816887295953259425473193925030309413640835783747028502752120524092949344949130022299170988249046847808312190965395391370080234613149770703362407808943136004006928997863631710354921289575387989958513842577577345887880761384773481761875866578540597955855903369789772785239224615350063626507720695433887430653156312614213475586347138543298390444672387649535945264525614344736024842711636953074617499051944023490644301780983638054985597760092376612120326179798420970864306893283604187638949449144824593832340798672886069817368199040559343190973095580054942502827327023583300791701759892378111319021052479334993991821484110866392784559795140279757439167298982438876066238275350580641737047193859362946853169303677695523137248879981463376279339528212534779180852448617929298985651000873727969139673547216334214700810267670244696981326355379640589923601880794327878574096680767259766883090462271606502222208302397638337055554402489333963883625297717599429035285484197484146476846968395732897088998370715574616746919056196800224906795014039137570500019325167570302499236853458570037981689663047092665935945822619267222231251215178739458799921040913198714025179156961434877569823824975887194273017981 . . . . . . . . . . . . . . . . . . . . [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) 19da373a7b1ab8d419ca6c05f80b679d956cb824 . . . . . . . . . . . . . . . . [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) 00f100770063f2dbcde83bcc2ccf0b728427576b33a48d61778fbd75a638b1c768544bd88d0000016be40b64990000040300483046022100d6360700295c84c88f2f77d9a92ccbc2609fcfc0931bdd10df8e5ac127b47850022100de4e5b1d8139802777c444aab39e227130f8e0a7d9799d87ec0242bafe24a8c80076006f5376ac31f03119d89900a45115ff77151c11d902c10029068db2089a37d9130000016be40b64ef0000040300473045022100ccdd22dec838c16b3ef368a7aa28ae2d6e6aa9e32e0b6d2ae14fc183316f170402204a89754b22805d7cf410bbd021d1d1187068d3091d8df632f32d4975041d2c7a . . . . [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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