yushikai.co.uk
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:8a:ae:3b:39:8e:77:5c:eb:1e:7a:e7:fe:58:94:66:3a:ab 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): 03:8a:ae:3b:39:8e:77:5c:eb:1e:7a:e7:fe:58:94:66:3a:abSerial Number (int): 308527417614536164347366016896719649127083
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: 5e:a1:b5:e1:13:2d:61:a0:c4:21:4a:c5:dd:06:c2:3a:75:c0:cf:a9
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): 98:4a:ad:f7:20:b0:95:22:e9:2c:17:ec:e6:6b:46:47:78:85:7c:3b
Fingerprint (sha256): 5d:ba:7f:25:d4:8a:d5:5c:ec:6f:8a:51:0d:d7:0b:b5:6d:49:f3:20:b8:74:07:99:42:d0:43:aa:03:5b:b9:5f
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
Certificate
The complete raw certificate details for yushikai.co.uk in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIGaTCCBVGgAwIBAgISA4quOzmOd1zrHnrn/liUZjqrMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xOTA0MjMwMTM2NTNaFw0x OTA3MjIwMTM2NTNaMBkxFzAVBgNVBAMTDnl1c2hpa2FpLmNvLnVrMIICIjANBgkq hkiG9w0BAQEFAAOCAg8AMIICCgKCAgEA0m9m5XxmN1CoI2opcZkDOI6ove3iYGPi Ai4fFHMDn4PpOYxz4VMob47GIkqYUkQwu3jfaJ9iKUmh00sDxhvCmscog43U+V5y 16onDkj2+g16IRSBQhwumx+tZSY7wJXTdgcyTglkRia0KE5UWS8e5lbHvUMOU25B iTOnfkZb5G7S1KrUrjk70NdE0EDqEUDc/5k5R/uL40e5rX0ckcxingGvKaq+1lN1 9AYUuRZog2PTyP/dNKyHhPrGMRwdx9z+GpIYcw3BrrixSHW6Xzs0NN6cVvp4ZCvv Ea0FPF1x4c6t3xR+/ETP1QkXJPv0YqruKw1AbaCSEQSAb+Faah+7Ez6lkrLD8hRZ H0VYR6hgy3v5mboH2+nVLQfwC5E/sQ5MCsyhCv7jUjMyFWEAr6FM9Q9LaNQRSUsM sSHK2CzToJN2ml4dn412Ej+NsOQk9woZfa4EzbR99lMrqf1rZ1j4XTbNZCwrrVwR PhACx/xgiNvviGiaRT3gUPbG2Gj6tufGCAPdffU6s9uhOl++7cydrXhJQWlzCrFK cxhOe8hQNC73UQ5dfT6DKx06isc3tLb8bAT5Ix8HbOqci7OnteIwCg9Vhjv/pFUd BDNGUxdRP5Nizsl7a/rAxM33kVRROVBkR+0LSniuaeiCwfmerI/53D4K3VVdr7a3 6YLubZJdiP0CAwEAAaOCAngwggJ0MA4GA1UdDwEB/wQEAwIFoDAdBgNVHSUEFjAU BggrBgEFBQcDAQYIKwYBBQUHAwIwDAYDVR0TAQH/BAIwADAdBgNVHQ4EFgQUXqG1 4RMtYaDEIUrF3QbCOnXAz6kwHwYDVR0jBBgwFoAUqEpqYwR93brm0Tm3pkVl7/Oo 7KEwbwYIKwYBBQUHAQEEYzBhMC4GCCsGAQUFBzABhiJodHRwOi8vb2NzcC5pbnQt eDMubGV0c2VuY3J5cHQub3JnMC8GCCsGAQUFBzAChiNodHRwOi8vY2VydC5pbnQt eDMubGV0c2VuY3J5cHQub3JnLzAtBgNVHREEJjAkghJ3d3cueXVzaGlrYWkuY28u dWuCDnl1c2hpa2FpLmNvLnVrMEwGA1UdIARFMEMwCAYGZ4EMAQIBMDcGCysGAQQB gt8TAQEBMCgwJgYIKwYBBQUHAgEWGmh0dHA6Ly9jcHMubGV0c2VuY3J5cHQub3Jn MIIBBQYKKwYBBAHWeQIEAgSB9gSB8wDxAHcA4mlLribo6UAJ6IYbtjuD1D7n/nSI +6SPKJMBnd3x2/4AAAFqSA2hVwAABAMASDBGAiEAtFbGR0vSt5dDsojNwDQP4mpl ijLxyjtcKfxISRqq5k0CIQDrmA5E3dUFMHEfTZQ6nkNxoNhk5MJcds/GgfDxznNw BAB2AGPy283oO8wszwtyhCdXazOkjWF3j711pjixx2hUS9iNAAABakgNoZ8AAAQD AEcwRQIgTB01JNA85IVACetMh1tsU1FselAolReudYDX6sgWSJICIQC2P4+6LotT 0PyrmuqsCivHYho7qEkcv3PnfMGA69UHWjANBgkqhkiG9w0BAQsFAAOCAQEAU6US 8KRUlEn4kLZTZT/JeMgv9mJnhmaayI2snlNgBVjia5l468wp9xU1Ykrn1f64cn2C OWyTPUc/y/Ex3lEBF++hJMEfFZZ47QYiNuspAcBj3pCHO1tsH6T8ogfY0yQgsHWj HPr9fOBQQDusbFbaPCe2wbJaJxgeBa7ZiISBJ/NowIS4eC21y1/c1/bgvxqNjaha +f9ISD+IRD27bS+wmI6WEimWeKHtZwBWo9v6UzOvW9xLVXu53fcBCGFaqghViQA6 Bw4DQ4/uE1JYajk97qgrsM43wApW+DoMH9gH6eNtDMSwT0NfOUp/1CK4zdVD4lb2 s8WIfo+X1jmBU13xfw== -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEA0m9m5XxmN1CoI2opcZkD OI6ove3iYGPiAi4fFHMDn4PpOYxz4VMob47GIkqYUkQwu3jfaJ9iKUmh00sDxhvC mscog43U+V5y16onDkj2+g16IRSBQhwumx+tZSY7wJXTdgcyTglkRia0KE5UWS8e 5lbHvUMOU25BiTOnfkZb5G7S1KrUrjk70NdE0EDqEUDc/5k5R/uL40e5rX0ckcxi ngGvKaq+1lN19AYUuRZog2PTyP/dNKyHhPrGMRwdx9z+GpIYcw3BrrixSHW6Xzs0 NN6cVvp4ZCvvEa0FPF1x4c6t3xR+/ETP1QkXJPv0YqruKw1AbaCSEQSAb+Faah+7 Ez6lkrLD8hRZH0VYR6hgy3v5mboH2+nVLQfwC5E/sQ5MCsyhCv7jUjMyFWEAr6FM 9Q9LaNQRSUsMsSHK2CzToJN2ml4dn412Ej+NsOQk9woZfa4EzbR99lMrqf1rZ1j4 XTbNZCwrrVwRPhACx/xgiNvviGiaRT3gUPbG2Gj6tufGCAPdffU6s9uhOl++7cyd rXhJQWlzCrFKcxhOe8hQNC73UQ5dfT6DKx06isc3tLb8bAT5Ix8HbOqci7OnteIw Cg9Vhjv/pFUdBDNGUxdRP5Nizsl7a/rAxM33kVRROVBkR+0LSniuaeiCwfmerI/5 3D4K3VVdr7a36YLubZJdiP0CAwEAAQ== -----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 308527417614536164347366016896719649127083 . . . . . . . . [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 2019-04-23 01:36:53 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-07-22 01:36:53 +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 858500567801145828494512178483137738528785302287701254966965299680512754028373620608754685462130580285676351330138334058165530031168557485599160735557522593806753342514082798314459467831241236588738666026812915855655305728155654447936094623395815985065620112537793389497318395226980839264887774059780939320014415038967906535402427811383007173930672058261387175288695707395159670636368482491542480349596550730841502779425556656200262088107556002189117865578366817645440227517127016422350742532253643932402358200185298215904812401657258891469145992257567936341094993568494366955711029317478760202671507567365021609597242018806965398605778578335352372409489453914653666975384662901045113080991732383674696872167780397695989437277430843788829608362612413572075913792878401295196313451032493823929946823230100555954274929885291474434534037616417874416777374278344481834433417970047229494513325738526241083749617108784361907598207012830554190004460341009131267751846761179201035651575559449600907224084084186814725991675419885483052628259990663186164098500587850766271279902669271378927993731154244014781067857777040664982906338386160183612030361256807212128769445378187640968455028745783550618873923712659915772194655858821124395661887741 . . . . . . . . . . . . . . . . . . . . [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) 5ea1b5e1132d61a0c4214ac5dd06c23a75c0cfa9 . . . . . . . . . . . . . . . . [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) 00f1007700e2694bae26e8e94009e8861bb63b83d43ee7fe7488fba48f2893019dddf1dbfe0000016a480da1570000040300483046022100b456c6474bd2b79743b288cdc0340fe26a658a32f1ca3b5c29fc48491aaae64d022100eb980e44ddd50530711f4d943a9e4371a0d864e4c25c76cfc681f0f1ce73700400760063f2dbcde83bcc2ccf0b728427576b33a48d61778fbd75a638b1c768544bd88d0000016a480da19f000004030047304502204c1d3524d03ce4854009eb4c875b6c53516c7a50289517ae7580d7eac8164892022100b63f8fba2e8b53d0fcab9aeaac0a2bc7621a3ba8491cbf73e77cc180ebd5075a . . . . [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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