yushikai.co.uk
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:d7:b7:47:88:9b:e8:fb:91:83:c7:d7:a8:fb:e7:94:0f:46 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:d7:b7:47:88:9b:e8:fb:91:83:c7:d7:a8:fb:e7:94:0f:46Serial Number (int): 334741186830348281098171750428279240396614
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: 91:58:a5:f6:ed:32:fd:09:21:1d:d6:ca:52:40:8e:cc:e9:f9:40:77
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): 56:97:4d:bf:32:1a:db:41:7c:30:e6:fc:49:db:08:0b:4a:a5:33:b7
Fingerprint (sha256): 2e:9c:46:0d:ad:24:f0:d1:b3:f0:a8:ca:b3:d7:15:35:fb:c8:c1:2a:da:a7:ec:3b:53:b8:b6:05:72:b4:cf:56
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
Certificate
The complete raw certificate details for yushikai.co.uk in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIGaDCCBVCgAwIBAgISA9e3R4ib6PuRg8fXqPvnlA9GMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xOTA1MDMwMTM3MzdaFw0x OTA4MDEwMTM3MzdaMBkxFzAVBgNVBAMTDnl1c2hpa2FpLmNvLnVrMIICIjANBgkq hkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAy2wPru/ItaaisQizWavUAzSaThrKd/Vi MJzu2QA/yhm9hFPYIDXZ0ESlS4thity4fKVJl0yPXZByRYfdOUCA0f5xFEaulJ08 zKjGzoVTuFiVc8X8LqjGeBLUJ164lkbk+BQ8y3eN4qRt0s8jKEyv7B3mY7a9f57V DSNU1Tc8Qoi3eN/fmphcHdwpSnP7oSCzTvLEE4MAZuf1Q7WWXjx9goAmdShKjWte MtoGkx1IKI7uhwM/nb3HWpqTCZW12QXGTEg6MeQqZ8XQFo2+0SzQhcDKdsfEikJT c42A96oGeuwvgPFhKMMjoLvxGULvMU28DZ5IFh9gXcEcJIRBdre9tY9ATVV7Kor6 FrKQzS84G27wq1eXePqSMJ39Uj6O2n5/KOK6MtmtNGZ6l8a1vcnYY2KqzaHhN/+7 thtmrbSSYEyzsPKrWL3XMGH0Ea6WQRtPceTqg8FaOBwOr6LUv1+ry5KY5ygNhnBc Jxxwu2/JgXZUtsx6kBduc48wbNUmjv+vp9U40Mxm2e76HagfVR/YsR4ruo0twMCB 0WNBak0O+n8Ho6VDuc+iPhVLV5m6DZj1nXQ4NyUdSDBJEtMGsVo81AnljoyiW3MI 2aquaytpnHBTia9DZzP+j9d/w2fnfJzcOoYITKKrErigMhyK02KEiXhxwG/P8d3I KG2axsvuXlMCAwEAAaOCAncwggJzMA4GA1UdDwEB/wQEAwIFoDAdBgNVHSUEFjAU BggrBgEFBQcDAQYIKwYBBQUHAwIwDAYDVR0TAQH/BAIwADAdBgNVHQ4EFgQUkVil 9u0y/QkhHdbKUkCOzOn5QHcwHwYDVR0jBBgwFoAUqEpqYwR93brm0Tm3pkVl7/Oo 7KEwbwYIKwYBBQUHAQEEYzBhMC4GCCsGAQUFBzABhiJodHRwOi8vb2NzcC5pbnQt eDMubGV0c2VuY3J5cHQub3JnMC8GCCsGAQUFBzAChiNodHRwOi8vY2VydC5pbnQt eDMubGV0c2VuY3J5cHQub3JnLzAtBgNVHREEJjAkghJ3d3cueXVzaGlrYWkuY28u dWuCDnl1c2hpa2FpLmNvLnVrMEwGA1UdIARFMEMwCAYGZ4EMAQIBMDcGCysGAQQB gt8TAQEBMCgwJgYIKwYBBQUHAgEWGmh0dHA6Ly9jcHMubGV0c2VuY3J5cHQub3Jn MIIBBAYKKwYBBAHWeQIEAgSB9QSB8gDwAHcAb1N2rDHwMRnYmQCkURX/dxUcEdkC wQApBo2yCJo32RMAAAFqe43lqwAABAMASDBGAiEA09cz4ieLjm70lwCbb302UaQq RBxayBjM/pM4MS0BQwYCIQD5iW2aWtHbndcMfc5d3VjR10j8pWfEazmcR37VmQ77 6QB1AGPy283oO8wszwtyhCdXazOkjWF3j711pjixx2hUS9iNAAABanuN5MIAAAQD AEYwRAIgZGwd8Wtfmpx/wW+i1qhyWA3RNO3nVr3rLm5SId3G438CIArIeyTSsgqV uiH1QaiCcXvmbHMKtpGYV1FGQyxSqCrfMA0GCSqGSIb3DQEBCwUAA4IBAQADRLPI /ugM+b8ZSRRDvS+gjbzqoDHkfpQdyn0Cb0OR5NIRNB/uX2fgrk+oFs8vEvAiatpv xhRmqkBDgKtns5BiUKp8GotqH4qe1A5G4MSbII9dbYaS0e27mS5gHIQ5MGaitBlT E472RvU+Qsjp2JFSNx6LXRcOQZASG2TrlzIPZ0l9ci0RfyhGExHJ1rxm51/xvktY 7UO1Zbaue+JZeH7d4OQXNr8s0FJ7l8sutzhY2/gaD23kyXgSqG+lEncOBKokqzu3 m8cuJSpKgXwhLKVVUc6MndEu0X3hgExZGQoLltYSDc0ENlrNFbsi5koywBwULCK+ HSApiiPgJ6DN2Opd -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAy2wPru/ItaaisQizWavU AzSaThrKd/ViMJzu2QA/yhm9hFPYIDXZ0ESlS4thity4fKVJl0yPXZByRYfdOUCA 0f5xFEaulJ08zKjGzoVTuFiVc8X8LqjGeBLUJ164lkbk+BQ8y3eN4qRt0s8jKEyv 7B3mY7a9f57VDSNU1Tc8Qoi3eN/fmphcHdwpSnP7oSCzTvLEE4MAZuf1Q7WWXjx9 goAmdShKjWteMtoGkx1IKI7uhwM/nb3HWpqTCZW12QXGTEg6MeQqZ8XQFo2+0SzQ hcDKdsfEikJTc42A96oGeuwvgPFhKMMjoLvxGULvMU28DZ5IFh9gXcEcJIRBdre9 tY9ATVV7Kor6FrKQzS84G27wq1eXePqSMJ39Uj6O2n5/KOK6MtmtNGZ6l8a1vcnY Y2KqzaHhN/+7thtmrbSSYEyzsPKrWL3XMGH0Ea6WQRtPceTqg8FaOBwOr6LUv1+r y5KY5ygNhnBcJxxwu2/JgXZUtsx6kBduc48wbNUmjv+vp9U40Mxm2e76HagfVR/Y sR4ruo0twMCB0WNBak0O+n8Ho6VDuc+iPhVLV5m6DZj1nXQ4NyUdSDBJEtMGsVo8 1AnljoyiW3MI2aquaytpnHBTia9DZzP+j9d/w2fnfJzcOoYITKKrErigMhyK02KE iXhxwG/P8d3IKG2axsvuXlMCAwEAAQ== -----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 334741186830348281098171750428279240396614 . . . . . . . . [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 2019-05-03 01:37:37 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-08-01 01:37:37 +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 829889821944306728726924900191534122691570672652537283574997534935876017643206276268198413454816072521252437965568405215198431112465817840832710301089070894581405612704412055787792705882705231092299173542211617951867641552914547712989030979312719674339072325380139370822972947617742061367327270010751010235279019024454609474973543897504625208356378050612376256537864329800010128361222518265483792843000233721575478155710606717302544238468231933901537025444232607477155177213074140421044073529693292707903091577910536015791153789957931135113638379894558799025950165175036106883458431807194298399342459657611708004094984238116455690414246749666466612876942234413256924614292948171825773560711778933898072868214857436878297411998104746109679697691769936565543865733915871283853696496426064021328693749778105149238527582759236452524621090992548576194328956315617992694246145181556317093508352089196066898559043169000389363558562260465410230630040037932465811456781400476585352498870070919536907817203469879557132095508028038658550849107618790734733854617395599112237512767119610184839906097467936136753817431360028620078948247136193377172864027163080970352808150431514326245085202303619569562910237676800557733086161460608838755777666643 . . . . . . . . . . . . . . . . . . . . [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) 9158a5f6ed32fd09211dd6ca52408ecce9f94077 . . . . . . . . . . . . . . . . [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 (245 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (242 bytes) 00f00077006f5376ac31f03119d89900a45115ff77151c11d902c10029068db2089a37d9130000016a7b8de5ab0000040300483046022100d3d733e2278b8e6ef497009b6f7d3651a42a441c5ac818ccfe9338312d014306022100f9896d9a5ad1db9dd70c7dce5ddd58d1d748fca567c46b399c477ed5990efbe900750063f2dbcde83bcc2ccf0b728427576b33a48d61778fbd75a638b1c768544bd88d0000016a7b8de4c200000403004630440220646c1df16b5f9a9c7fc16fa2d6a872580dd134ede756bdeb2e6e5221ddc6e37f02200ac87b24d2b20a95ba21f541a882717be66c730ab69198575146432c52a82adf . . . . [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) 000344b3c8fee80cf9bf19491443bd2fa08dbceaa031e47e941dca7d026f4391e4d211341fee5f67e0ae4fa816cf2f12f0226ada6fc61466aa404380ab67b3906250aa7c1a8b6a1f8a9ed40e46e0c49b208f5d6d8692d1edbb992e601c84393066a2b41953138ef646f53e42c8e9d89152371e8b5d170e4190121b64eb97320f67497d722d117f28461311c9d6bc66e75ff1be4b58ed43b565b6ae7be259787edde0e41736bf2cd0527b97cb2eb73858dbf81a0f6de4c97812a86fa512770e04aa24ab3bb79bc72e252a4a817c212ca55551ce8c9dd12ed17de1804c59190a0b96d6120dcd04365acd15bb22e64a32c01c142c22be1d20298a23e027a0cdd8ea5d