yushikai.co.uk
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:50:02:cb:ec:b2:b8:e2:1f:36:ca:49:f1:41:30:39:e6:ef 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): 03:50:02:cb:ec:b2:b8:e2:1f:36:ca:49:f1:41:30:39:e6:efSerial Number (int): 288563164442018167414475760544926368655087
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: b8:79:95:6c:3f:e2:6d:4c:93:e4:7e:3f:0a:fb:ef:73:92:69:14:d2
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): 98:75:ba:8f:d4:86:08:90:57:48:0f:fd:12:05:38:20:cd:a1:f8:e2
Fingerprint (sha256): 20:01:79:d3:9b:2c:0a:cf:d0:85:23:85:d9:b8:13:bc:51:71:5b:3e:19:d9:d1:8d:73:f5:a4:46:3c:a2:ab:f5
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
Certificate
The complete raw certificate details for yushikai.co.uk in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIGZzCCBU+gAwIBAgISA1ACy+yyuOIfNspJ8UEwOebvMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xOTAxMTAwMjUyNTRaFw0x OTA0MTAwMjUyNTRaMBkxFzAVBgNVBAMTDnl1c2hpa2FpLmNvLnVrMIICIjANBgkq hkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAv0XffHVOhMTtSY+lKkiHsuNTAXRuURxX Pcy7g6Uja9lIvl3rWkSg/vEJJpSNHKLS5FUXBLtAYbft8FaBqJ5kNiSj2Xo/vWFA mRMxWJlIqnw0LPiEjP6sEpPlSILH3zwP9eKgB49pWxqgFVeFLQp3wIiNMeLj21Qq ETzlEOeh/IBjT5TauTWmm4UQaBNpgE6Cq9q32g+IBa75aaD9FGSmYxSnLdq61b3K 4VF384k4dX/JNZn8yjIIVbXNJufGQaZMStmBm6+7o0JCD1aXhVC63w3BTJ4Sqn0R Amn1RIBb+GE4zajh4m9YtYVde8kV7hB/kM1i7bivtet0v37SDUkfgRTuYQSSdTPT eoZ0cvX/os61ni+XQO1VevwK838HYVfW+lxOv4g3yR4RspYuuvelMclmOqNOKOlC 4HjBXF8w/tc+ULzLgwZw8ixJCMWQ/rfCPEyiNw54N43hZ2ZVXOFu5LFA+zCErvqE I+e+vJlMZ6BEJ0ipDu70QJWBddltB+HFCuYR05DLORQcUKVwnxgRRmHyPHH1lFF9 hsTApyAWdiJU1k3GZiKGtNN2A1AezmSZXNctwy5JF6/hP/4nSzC954uZgNGbLq1e 4OzhBAoOxQjNwGcFefW+M7yyN0aSO1Iv7MVejszNHjrmDLOvgU1anNCxqOA1SREE nU5qEXkhmgUCAwEAAaOCAnYwggJyMA4GA1UdDwEB/wQEAwIFoDAdBgNVHSUEFjAU BggrBgEFBQcDAQYIKwYBBQUHAwIwDAYDVR0TAQH/BAIwADAdBgNVHQ4EFgQUuHmV bD/ibUyT5H4/Cvvvc5JpFNIwHwYDVR0jBBgwFoAUqEpqYwR93brm0Tm3pkVl7/Oo 7KEwbwYIKwYBBQUHAQEEYzBhMC4GCCsGAQUFBzABhiJodHRwOi8vb2NzcC5pbnQt eDMubGV0c2VuY3J5cHQub3JnMC8GCCsGAQUFBzAChiNodHRwOi8vY2VydC5pbnQt eDMubGV0c2VuY3J5cHQub3JnLzAtBgNVHREEJjAkghJ3d3cueXVzaGlrYWkuY28u dWuCDnl1c2hpa2FpLmNvLnVrMEwGA1UdIARFMEMwCAYGZ4EMAQIBMDcGCysGAQQB gt8TAQEBMCgwJgYIKwYBBQUHAgEWGmh0dHA6Ly9jcHMubGV0c2VuY3J5cHQub3Jn MIIBAwYKKwYBBAHWeQIEAgSB9ASB8QDvAHUAdH7agzGtMxCRIZzOJU9CcMK//V5C IAjGNzV55hB7zFYAAAFoNeQ1uAAABAMARjBEAiAV3zSHsE2Pay6841yGuSFogxPY 1a/MUBr4UysaW6p8/gIgTtrOHOdtld0zUDc2cRYh1gHO0EO9Bg+pwvpBcP+gEGgA dgBj8tvN6DvMLM8LcoQnV2szpI1hd4+9daY4scdoVEvYjQAAAWg15DQBAAAEAwBH MEUCIQDM0T94oyGpozcHzCImEqaFYeqTil9rpM/2jOGGOQXtmAIgBSA72yT4axJR EpBUV/BqEnxilxkGDJ34eEv9uh+i0PgwDQYJKoZIhvcNAQELBQADggEBAIsYKUeN Jv6U18xiQeC7JjNqfHOdjIyteJoCbc8ATk2JGOt/1GcngKYElI0kPoU+CPxjm1Qf ulGjj8hxCACW61TC4EnNkkH3bnyAm0Z+yejO18sGxu7ydRKWHU/y9od2Z4+bz57Q ndeVWxsB3zdUgs4UTQ2q8YsnWzKB86YAat0gHbV5sleCRbLFBu4k1PUsmfWHsnWg 06QmOVir3VU5/jDySPmptW2L5iYp1MAnAQPGdRdIoHBsAhtUHlQwBOkCZYCPXfpq 5i/miqq1XC2uBFGOUlw5VjCgXSJj1so8Yq+Zh8/8P+7re2IVaZHzDbyItHuxExR/ ZbvxsdtyKZc9LhA= -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAv0XffHVOhMTtSY+lKkiH suNTAXRuURxXPcy7g6Uja9lIvl3rWkSg/vEJJpSNHKLS5FUXBLtAYbft8FaBqJ5k NiSj2Xo/vWFAmRMxWJlIqnw0LPiEjP6sEpPlSILH3zwP9eKgB49pWxqgFVeFLQp3 wIiNMeLj21QqETzlEOeh/IBjT5TauTWmm4UQaBNpgE6Cq9q32g+IBa75aaD9FGSm YxSnLdq61b3K4VF384k4dX/JNZn8yjIIVbXNJufGQaZMStmBm6+7o0JCD1aXhVC6 3w3BTJ4Sqn0RAmn1RIBb+GE4zajh4m9YtYVde8kV7hB/kM1i7bivtet0v37SDUkf gRTuYQSSdTPTeoZ0cvX/os61ni+XQO1VevwK838HYVfW+lxOv4g3yR4RspYuuvel MclmOqNOKOlC4HjBXF8w/tc+ULzLgwZw8ixJCMWQ/rfCPEyiNw54N43hZ2ZVXOFu 5LFA+zCErvqEI+e+vJlMZ6BEJ0ipDu70QJWBddltB+HFCuYR05DLORQcUKVwnxgR RmHyPHH1lFF9hsTApyAWdiJU1k3GZiKGtNN2A1AezmSZXNctwy5JF6/hP/4nSzC9 54uZgNGbLq1e4OzhBAoOxQjNwGcFefW+M7yyN0aSO1Iv7MVejszNHjrmDLOvgU1a nNCxqOA1SREEnU5qEXkhmgUCAwEAAQ== -----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 288563164442018167414475760544926368655087 . . . . . . . . [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 2019-01-10 02:52:54 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-04-10 02:52:54 +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 780325520666537011342399463343646047180586620276153834402977657058570473060050262738444964840324639125788246848670087712951252221432431993668556656164701983642520747300332810994056047697367526170428173505822732283797669962919720368876155857420428057558947398107865741491264948958656089316269937755358458473848135012516018332327818338492991877593729338429230704237603363627111408307608317818787085283864095619195845534116145285490322540170297195501850121083265898338234255685477618275326865299297416355214015205312339097130598899645875375403126721435498650272434333323964408466136386734742471876307842954315660413812029378690289811495576795068551619630803747823187116615409997778139235385733342571759809813361209383665126143624068433100026361093745323130088094523218655504633889587632882153466035325529445239383952421563256253163436796535251471566966340631355255731373055004407080568035834809212509698185898620782850361847707293691685693982688595269453636478334294092636198231603991969691617341715026786125394893557830580888096052482003329238610960040700045970061323838505519346428373706150505742756499164718525199409974633372169030931737182797139350541933626474291516259939033954755165703631105341450224608847202192430308133024406021 . . . . . . . . . . . . . . . . . . . . [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) b879956c3fe26d4c93e47e3f0afbef73926914d2 . . . . . . . . . . . . . . . . [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 (244 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (241 bytes) 00ef007500747eda8331ad331091219cce254f4270c2bffd5e422008c6373579e6107bcc560000016835e435b80000040300463044022015df3487b04d8f6b2ebce35c86b921688313d8d5afcc501af8532b1a5baa7cfe02204edace1ce76d95dd33503736711621d601ced043bd060fa9c2fa4170ffa0106800760063f2dbcde83bcc2ccf0b728427576b33a48d61778fbd75a638b1c768544bd88d0000016835e434010000040300473045022100ccd13f78a321a9a33707cc222612a68561ea938a5f6ba4cff68ce1863905ed98022005203bdb24f86b125112905457f06a127c629719060c9df8784bfdba1fa2d0f8 . . . . [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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