yushikai.co.uk
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:fb:bc:ef:67:ce:be:fb:7a:0f:90:c5:80:b6:ee:9d:c2:cf 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:fb:bc:ef:67:ce:be:fb:7a:0f:90:c5:80:b6:ee:9d:c2:cfSerial Number (int): 346998869820061345099810989491582100423375
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: df:d2:a3:d2:22:82:2e:6b:91:6d:4f:8b:a0:80:be:23:0c:42:ff:a0
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): 9b:e9:0a:1a:07:5f:93:0b:4e:28:31:f6:2e:60:f4:b4:31:cb:c0:d6
Fingerprint (sha256): 1a:56:bc:11:40:28:28:0c:d9:53:77:37:a3:82:ca:4b:a0:48:cb:b0:7e:3b:7e:6f:6a:cf:e9:ad:e7:ae:8f:5e
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----- MIIGaTCCBVGgAwIBAgISA/u872fOvvt6D5DFgLbuncLPMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xOTAxMDIwMjQ5MjFaFw0x OTA0MDIwMjQ5MjFaMBkxFzAVBgNVBAMTDnl1c2hpa2FpLmNvLnVrMIICIjANBgkq hkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAxFFXtWK7l9hsi7iCNqM0dAzADIDFGoBm CklWXzyvsfl4d9cSmlJSXgDk9YvXfD9R/5ksEn5I6tYGjSi3CnVPKxJ/z5cHTn9b 2VMKtzjYE0b8ZbZLDWLjj62Doy8Om4waKsC/dFiYyXGCHDxai1TBf5Kdl+JWUagy gUAhN8ZS8/NXD+1wQfvN+nBAfAMArKVtSNUmoKd34Eju+OZ/4UiY9L0auIHJz1w+ eEiLk45Ny8LHbMaakxWR7VlebHaOKWIMVIUhXR3KryhOXlF+G3Tk0f/jkcEDMrPG asXQf+y606KJhiKuhZ6tkrEpEBTTTj9dot+vPSHshoXuJ1USyVledhyY+y/Mn5ey w5rDmIZru+0eOIKvVupYzAmJPTwZTFB6IkRldpJVfFMfNfkLgyIOff9AuJ9t9cOp nUqWZeNO9PJFPrmmP8dUwm41qGOsARq324qwLMCboSLa6x299Zfa3NU8LaVdQuXM HIRp1oVsWN1mjiZXupeD94KLkFUVECu91Xac72mKcAg6jj5HPOsDv5rf1o1JgdcV dnSkB6B4vMPte6kakgsA1gJxT+HoA1wVP5ii9KLJf0INwcUC6T8RvT+sP7AlqVC5 h/Sf3eqVyTAutI5XVKTGpeT0O/eGT0ZMVAfF2dHGQCebGxyWsV9c6TBrR8x22FAO aXB9zFxVJPUCAwEAAaOCAngwggJ0MA4GA1UdDwEB/wQEAwIFoDAdBgNVHSUEFjAU BggrBgEFBQcDAQYIKwYBBQUHAwIwDAYDVR0TAQH/BAIwADAdBgNVHQ4EFgQU39Kj 0iKCLmuRbU+LoIC+IwxC/6AwHwYDVR0jBBgwFoAUqEpqYwR93brm0Tm3pkVl7/Oo 7KEwbwYIKwYBBQUHAQEEYzBhMC4GCCsGAQUFBzABhiJodHRwOi8vb2NzcC5pbnQt eDMubGV0c2VuY3J5cHQub3JnMC8GCCsGAQUFBzAChiNodHRwOi8vY2VydC5pbnQt eDMubGV0c2VuY3J5cHQub3JnLzAtBgNVHREEJjAkghJ3d3cueXVzaGlrYWkuY28u dWuCDnl1c2hpa2FpLmNvLnVrMEwGA1UdIARFMEMwCAYGZ4EMAQIBMDcGCysGAQQB gt8TAQEBMCgwJgYIKwYBBQUHAgEWGmh0dHA6Ly9jcHMubGV0c2VuY3J5cHQub3Jn MIIBBQYKKwYBBAHWeQIEAgSB9gSB8wDxAHcAdH7agzGtMxCRIZzOJU9CcMK//V5C IAjGNzV55hB7zFYAAAFoDK4URwAABAMASDBGAiEAlYQkcEZ11QgY2R2uPW+seQOs WPo1sw0AMtJ1a1deJhcCIQCcxauNpisphOrI4T/o1n82UjcisdIeGZczyHcg4iMx OAB2AGPy283oO8wszwtyhCdXazOkjWF3j711pjixx2hUS9iNAAABaAyuEqoAAAQD AEcwRQIgIkrGXFmZi4sf05PPqX0mpr6MJaMsk6tx5FTg+FZEkksCIQC+ZpdLcF8F 1hrHEryv5ncYD+f08GBlENo9Gai9+MIaxDANBgkqhkiG9w0BAQsFAAOCAQEARw3f 7NFBNMZG46W0UwFu+/lvitFW480yKWaZwzS/XCIH+MERuEcor4kSdwqPqIzNeVLk xqZL69uLxTqPZTMjbrwUYiPt+GTN/KE8gTeM/6QMmkyQ9EuJsDhHNFAEgOsNVn6T qFcCB8C1QSEMHMfD1cydPhr4I5Yttb2EEOeuyEvRh1POd2yh4xorbf7FsQieMZXv /DO1cCr/c5CpVmezvn8o2W1JYIi7n4RnIN/vCnsowFQ+gCfIBx/HJreryx6BAuM0 jnrmiuP1bnSpFj74UqsjtG9q2wWvn9jdZmJbdeZOHy2BBpHS9o6QuFtuY5oliPog j1N7M3wEFDcQFXmjfw== -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAxFFXtWK7l9hsi7iCNqM0 dAzADIDFGoBmCklWXzyvsfl4d9cSmlJSXgDk9YvXfD9R/5ksEn5I6tYGjSi3CnVP KxJ/z5cHTn9b2VMKtzjYE0b8ZbZLDWLjj62Doy8Om4waKsC/dFiYyXGCHDxai1TB f5Kdl+JWUagygUAhN8ZS8/NXD+1wQfvN+nBAfAMArKVtSNUmoKd34Eju+OZ/4UiY 9L0auIHJz1w+eEiLk45Ny8LHbMaakxWR7VlebHaOKWIMVIUhXR3KryhOXlF+G3Tk 0f/jkcEDMrPGasXQf+y606KJhiKuhZ6tkrEpEBTTTj9dot+vPSHshoXuJ1USyVle dhyY+y/Mn5eyw5rDmIZru+0eOIKvVupYzAmJPTwZTFB6IkRldpJVfFMfNfkLgyIO ff9AuJ9t9cOpnUqWZeNO9PJFPrmmP8dUwm41qGOsARq324qwLMCboSLa6x299Zfa 3NU8LaVdQuXMHIRp1oVsWN1mjiZXupeD94KLkFUVECu91Xac72mKcAg6jj5HPOsD v5rf1o1JgdcVdnSkB6B4vMPte6kakgsA1gJxT+HoA1wVP5ii9KLJf0INwcUC6T8R vT+sP7AlqVC5h/Sf3eqVyTAutI5XVKTGpeT0O/eGT0ZMVAfF2dHGQCebGxyWsV9c 6TBrR8x22FAOaXB9zFxVJPUCAwEAAQ== -----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 346998869820061345099810989491582100423375 . . . . . . . . [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 2019-01-02 02:49:21 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-04-02 02:49:21 +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 800906522106883643255455722049336596434386652823694770543023131986254312742425232254647816847405362926029570634737418992273131746532904775233275918075047598913266489526028173951108004621955244467665672227156159045913955487641871393305610963555741091253842166666327882153200364426903247147198609358245726035745764585975579937492594487222183780680844552156217387376735924029705119810012268627032939440218137066482170402264619372957407965195315254072353331765864756521717149726861242928401015510777643960676934795640103252191156541021598376823234743354954169510057153888525885986338308793134992754469617250136299700361062696136428127837443627753421460820116083187820854892236111126416784588215934879745966508784360676392570166758607268973352533389108515645760426493000063551994214520954260642209420461483549146438813692107116121096992364661255207847645241162589418965288375611104552028557129888863739629690535731769604236053057223288406329712099801865232293370730232242934515861235227766455363126125844929373262055405341265328089740334946579209682074774594618490541581221917298512733772544806791857249937582952685200776539102258736771600090099802034016238471713072867298673425415325692926439040962757339135138356659410458248234902299893 . . . . . . . . . . . . . . . . . . . . [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) dfd2a3d222822e6b916d4f8ba080be230c42ffa0 . . . . . . . . . . . . . . . . [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) 00f1007700747eda8331ad331091219cce254f4270c2bffd5e422008c6373579e6107bcc56000001680cae14470000040300483046022100958424704675d50818d91dae3d6fac7903ac58fa35b30d0032d2756b575e26170221009cc5ab8da62b2984eac8e13fe8d67f36523722b1d21e199733c87720e223313800760063f2dbcde83bcc2ccf0b728427576b33a48d61778fbd75a638b1c768544bd88d000001680cae12aa00000403004730450220224ac65c59998b8b1fd393cfa97d26a6be8c25a32c93ab71e454e0f85644924b022100be66974b705f05d61ac712bcafe677180fe7f4f0606510da3d19a8bdf8c21ac4 . . . . [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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