yushikai.co.uk
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:68:d7:0a:b8:65:ee:21:71:b9:c9:ca:61:7d:88:0d:50:48 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): 03:68:d7:0a:b8:65:ee:21:71:b9:c9:ca:61:7d:88:0d:50:48Serial Number (int): 297012063637159791750805445775231762124872
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: 56:d0:09:9b:59:a9:2b:79:70:c6:50:d4:10:7f:d6:84:c4:56:0e:17
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): 18:4b:d7:f3:2b:0e:e6:1e:c7:86:7b:1c:a8:98:52:cf:00:9f:6d:7d
Fingerprint (sha256): 52:80:0a:73:77:7c:0b:f7:53:6f:83:68:40:df:93:4f:98:ff:99:31:0c:ab:eb:dc:a7:a4:21:17:56:45:59:42
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
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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----- MIIGaTCCBVGgAwIBAgISA2jXCrhl7iFxucnKYX2IDVBIMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xOTA0MTYwMTM2NTlaFw0x OTA3MTUwMTM2NTlaMBkxFzAVBgNVBAMTDnl1c2hpa2FpLmNvLnVrMIICIjANBgkq hkiG9w0BAQEFAAOCAg8AMIICCgKCAgEArULG2WsNaxs5omEAYCg0BkUILwGvetgL Z3Dr7mLNuQNV5f5VbzrvQ9bY0AjG63/RVS9cmUchJpWoBc2qJSrHt7U6lg5NiGdp oEVr2pJnNVQ/U03fTYgUrUTsKneMxIGb5XIzt3AtxwclfmXEl9ljofFuH/UzH9kp mMeB4q3u0+n6imdJqLmWU1VJ8cBEc3NnG2NmejKsg/z8VhlhkMWFdak2apgV532v tI10gexC3PdmvBpnxficZONx03dhThs7BQt3HobzXyZxyWyTplgagAStYgEpL0W1 Qt7OD9MuMCoaocyTTOP0q6TIbMrWn9LMD+Bt8Tddv5kHp2PZ44J0n1/RW6M93YKy iW/1Xk7Av+h8BksXb11+yA0wTXzO5wTMsUPnO4v/YYtcQGAyPineTt4OjQMnmwAC WosmRoeXkNXcPaTD8+AtlaKM2hoKNif7WqJGNsozOJ2Ekt88WeWdGphPDgeDeXG3 eNibmQBhio71UZlUD/uimtrIF75uO/q60FLhCylivJ3PmbXvZXiWv5R8fqfyk4zv s6bSbyfqCItrFFy5AAO7LPIOX6pUZpRQVIx02tb6ZSlA4FpqBUImBiirQBf+qxFB PWdjFTCehPga0KugW63cUXBzyLQ3G29d7iHSoK/WDoyLhkmKadKbUXLLdHB/SMPz KRdscOYMueUCAwEAAaOCAngwggJ0MA4GA1UdDwEB/wQEAwIFoDAdBgNVHSUEFjAU BggrBgEFBQcDAQYIKwYBBQUHAwIwDAYDVR0TAQH/BAIwADAdBgNVHQ4EFgQUVtAJ m1mpK3lwxlDUEH/WhMRWDhcwHwYDVR0jBBgwFoAUqEpqYwR93brm0Tm3pkVl7/Oo 7KEwbwYIKwYBBQUHAQEEYzBhMC4GCCsGAQUFBzABhiJodHRwOi8vb2NzcC5pbnQt eDMubGV0c2VuY3J5cHQub3JnMC8GCCsGAQUFBzAChiNodHRwOi8vY2VydC5pbnQt eDMubGV0c2VuY3J5cHQub3JnLzAtBgNVHREEJjAkghJ3d3cueXVzaGlrYWkuY28u dWuCDnl1c2hpa2FpLmNvLnVrMEwGA1UdIARFMEMwCAYGZ4EMAQIBMDcGCysGAQQB gt8TAQEBMCgwJgYIKwYBBQUHAgEWGmh0dHA6Ly9jcHMubGV0c2VuY3J5cHQub3Jn MIIBBQYKKwYBBAHWeQIEAgSB9gSB8wDxAHYAdH7agzGtMxCRIZzOJU9CcMK//V5C IAjGNzV55hB7zFYAAAFqJAEzWQAABAMARzBFAiA6K5d99MR9t1RA2ctXj/NCaL1r 7qqrBfnZ0bKq1xpCtgIhAIvnpTmqC2BDpScEIFN110JTLCtTx3FMYr3t9yk9pN8M AHcAKTxRllTIOWW6qlD8WAfUt2+/WHopctykwwz05UVH9HgAAAFqJAEzbgAABAMA SDBGAiEA7KJjdEgrL5K4RQnl3qiLWscZwln+1FMBKHGWUe8UQHoCIQDIwJo+Rg0F cGiC2LOr/9qF9znEtOu9Ih9A+CjQBwTO9DANBgkqhkiG9w0BAQsFAAOCAQEAFhyJ LN4t5PzPkm+WpzQ1Zl6xnvkFKzNJUQj3toFpaW6jCFwg8ckpua/1eTzrSO3iR4pd 8Z102tWF9SBwqu4WL9se8+chAGgqrqcQ3Cr6SqqRfhkbpyQFHH2R5FoT6ncKjzTK 0AWmU5NgyrGUuc49ZrV98ZUyR5Aoxj5T/6tKcZkGmki9C67wnpnSKdkBZhI32ggb aa84qXJuJc1R7QgafS6YiuZQfVe0wYrL6Q+czjzriq4HFQ5xPHtAxV1f1vtjlSoU /67egLr0X5NC2CFo7Q3lqni1cW9GBF8E1Lk2fZqQgYFqgnaSI6d/M8SEdoQT3LMi 5ab5a/EraGoQf89k+w== -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEArULG2WsNaxs5omEAYCg0 BkUILwGvetgLZ3Dr7mLNuQNV5f5VbzrvQ9bY0AjG63/RVS9cmUchJpWoBc2qJSrH t7U6lg5NiGdpoEVr2pJnNVQ/U03fTYgUrUTsKneMxIGb5XIzt3AtxwclfmXEl9lj ofFuH/UzH9kpmMeB4q3u0+n6imdJqLmWU1VJ8cBEc3NnG2NmejKsg/z8VhlhkMWF dak2apgV532vtI10gexC3PdmvBpnxficZONx03dhThs7BQt3HobzXyZxyWyTplga gAStYgEpL0W1Qt7OD9MuMCoaocyTTOP0q6TIbMrWn9LMD+Bt8Tddv5kHp2PZ44J0 n1/RW6M93YKyiW/1Xk7Av+h8BksXb11+yA0wTXzO5wTMsUPnO4v/YYtcQGAyPine Tt4OjQMnmwACWosmRoeXkNXcPaTD8+AtlaKM2hoKNif7WqJGNsozOJ2Ekt88WeWd GphPDgeDeXG3eNibmQBhio71UZlUD/uimtrIF75uO/q60FLhCylivJ3PmbXvZXiW v5R8fqfyk4zvs6bSbyfqCItrFFy5AAO7LPIOX6pUZpRQVIx02tb6ZSlA4FpqBUIm BiirQBf+qxFBPWdjFTCehPga0KugW63cUXBzyLQ3G29d7iHSoK/WDoyLhkmKadKb UXLLdHB/SMPzKRdscOYMueUCAwEAAQ== -----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 297012063637159791750805445775231762124872 . . . . . . . . [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 2019-04-16 01:36:59 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-07-15 01:36:59 +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 706842585457218704487271603595592825660564371442482593101447278988306194232203530452062928913389762663786859918809225916241354000192585041618003626398497537376627023192888787196492766842965872363946901268405989675823142866342851273917465744517822317332078497131357075979591532831793682024764457168056015501073028168747011995129665823437184925860835786794860560486811570901685700245112109554645624079900230261921855278321710589903411126381105784703499266185838947120587944620984120586694356346919297231872134260663561633233527804082949797574520102827742450887051332762950153585296227858932434189082393893071909303508476047995837622025327206242981862621889462604859282702360799842444839828064276367336128830967864812690068631965123919985307877043548349157777004243769593244374398853496404214586558995476011635708004514269437518844877803771504401616538317987109912000455211842236206405706066015122330351752842938439985158271844368791852993480679685757822490921480055804505165969552368229177582395229672948848480076871270102359899814640588003111522384151232603313899934390858282696946321667178110178254343654516764830257282634047967235260432787297733950654181804936487062115496177390998315551679897999647542868079436951020547733866723813 . . . . . . . . . . . . . . . . . . . . [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) 56d0099b59a92b7970c650d4107fd684c4560e17 . . . . . . . . . . . . . . . . [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) 00f1007600747eda8331ad331091219cce254f4270c2bffd5e422008c6373579e6107bcc560000016a24013359000004030047304502203a2b977df4c47db75440d9cb578ff34268bd6beeaaab05f9d9d1b2aad71a42b60221008be7a539aa0b6043a52704205375d742532c2b53c7714c62bdedf7293da4df0c007700293c519654c83965baaa50fc5807d4b76fbf587a2972dca4c30cf4e54547f4780000016a2401336e0000040300483046022100eca26374482b2f92b84509e5dea88b5ac719c259fed4530128719651ef14407a022100c8c09a3e460d05706882d8b3abffda85f739c4b4ebbd221f40f828d00704cef4 . . . . [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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