yushikai.co.uk
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:fe:1d:35:84:53:d8:8c:b5:2e:65:43:aa:e8:98:f7:de:a8 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:fe:1d:35:84:53:d8:8c:b5:2e:65:43:aa:e8:98:f7:de:a8Serial Number (int): 347807404480731398603792144371084688875176
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: c2:58:b4:3a:8d:43:0a:01:ba:95:c9:30:82:23:f7:1a:8a:98:aa:56
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): 1b:77:4c:f3:af:80:ae:8f:e4:cc:2c:de:88:af:83:7d:22:58:4b:ce
Fingerprint (sha256): 4c:1c:0f:8e:52:ae:8a:94:2b:90:cf:c7:a1:26:9e:08:c9:64:15:fc:66:53:1b:bc:6d:c8:4a:dc:0d:b1:e3:f8
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
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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+gAwIBAgISA/4dNYRT2Iy1LmVDquiY996oMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xOTA0MDQwMTM4NTFaFw0x OTA3MDMwMTM4NTFaMBkxFzAVBgNVBAMTDnl1c2hpa2FpLmNvLnVrMIICIjANBgkq hkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAv3kweWSEh1sGBLBDUO6cd2BBr6B20s2/ 3TxYQjfy0y109C8AfRvmjgk5rV8jdb61WHzPofIj8ja9Bkw97v20/JsJwkl7QkZV QCvuMw7oOCD9bq3uKxcj4bHhQgr4tNWT+0p++BMiDTwLoZdunOii5awDWMQK5hcD wBBinagDmh5X7/E+dbTnGZ0ks+r+c7bbsOI0OvkjBIoEdUiLdjTlYEjHSBRymfc3 z8bwK150xOJj1GFk3B2A/1OIUJlTw1QD4ypdMYxtPY6Jv8gSL06WZEkW+Lkvzgxb fhMxAbSgT82yYsFvN04sZAW99qB+A4xdec1QYiQ2EoUlfCBlDIXGDoaRsDK9juLU fmfDqNk2vl0uSvrnTMOPzcF3VhBgVWf4Feez/CezJEHQLl6IIzeL1CvAIELhdFFF 6jfdD6kerJ4hJD8S4sOtHnRxMrPbA+fmW3rkKmZIHrYllaK3Hx/BjVwoN+uKhLuC BnTskSH494w/LyHajcgXbhsS/Wz1fFrORoDQehJoolag+7Esdw3OjkscCxer+fQ2 XWXues5NoSw/f2WledN2NBC1vloebiNgRumWYeCRN84ymIJpbkoRnnWdWz5BVpNN TH7z7ERw1uJ35CAwM25Y0bboqSKfZ2iSmMTMyMUDJ0Ggvcpcyj7PkmH4RQKo42ak 1gogYoLlAZkCAwEAAaOCAnYwggJyMA4GA1UdDwEB/wQEAwIFoDAdBgNVHSUEFjAU BggrBgEFBQcDAQYIKwYBBQUHAwIwDAYDVR0TAQH/BAIwADAdBgNVHQ4EFgQUwli0 Oo1DCgG6lckwgiP3GoqYqlYwHwYDVR0jBBgwFoAUqEpqYwR93brm0Tm3pkVl7/Oo 7KEwbwYIKwYBBQUHAQEEYzBhMC4GCCsGAQUFBzABhiJodHRwOi8vb2NzcC5pbnQt eDMubGV0c2VuY3J5cHQub3JnMC8GCCsGAQUFBzAChiNodHRwOi8vY2VydC5pbnQt eDMubGV0c2VuY3J5cHQub3JnLzAtBgNVHREEJjAkghJ3d3cueXVzaGlrYWkuY28u dWuCDnl1c2hpa2FpLmNvLnVrMEwGA1UdIARFMEMwCAYGZ4EMAQIBMDcGCysGAQQB gt8TAQEBMCgwJgYIKwYBBQUHAgEWGmh0dHA6Ly9jcHMubGV0c2VuY3J5cHQub3Jn MIIBAwYKKwYBBAHWeQIEAgSB9ASB8QDvAHYA4mlLribo6UAJ6IYbtjuD1D7n/nSI +6SPKJMBnd3x2/4AAAFp5jaZHgAABAMARzBFAiAIrn35TshuQOthawCXqb9FWvTy guLyKQOllSINy4SfcAIhAO7TyA80gh/sEHZRl0RKxMjr7e3yzyVSUKU9IauzDriR AHUAY/Lbzeg7zCzPC3KEJ1drM6SNYXePvXWmOLHHaFRL2I0AAAFp5jabdAAABAMA RjBEAiBbtCXsL7e2cpYHDnJyiEvXmyi4LGw09bHXt1AwMXmOIwIgYIp5+ZeWDHtK 32duC+zENwViVCozeU/WSJLSIISdWlEwDQYJKoZIhvcNAQELBQADggEBADhO/ARH mS5r4nmkySqws5fvY6XCkWzIHNmmVfoakdmhMWtATT6qnm9CErW+Fy8i3C4vEqx3 gKPg+3XfSGEYtPgFya5knR2uzc5iiR7WEtBmJGJadNkLmnMOarZEXRq6uMthz1Dz IdJf/RjAWGrIqesCHiKfRaZg7VDqULCIcPznFgst+BV4t9p8W+Loneu2apBdmUa5 kwoZkItluULKXb2YqOxKrFVnd8xnG6p+5SP2jBBfgoq7WE45vZzkiJi7Gg7OwCFn hdYo/BWrlwaDWSJ81eKUFSqJYxD+hgo1Eqvjz9IooxgL1/k54FfYHH2i07s6lU05 i0z6hYGGP0kFlRA= -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAv3kweWSEh1sGBLBDUO6c d2BBr6B20s2/3TxYQjfy0y109C8AfRvmjgk5rV8jdb61WHzPofIj8ja9Bkw97v20 /JsJwkl7QkZVQCvuMw7oOCD9bq3uKxcj4bHhQgr4tNWT+0p++BMiDTwLoZdunOii 5awDWMQK5hcDwBBinagDmh5X7/E+dbTnGZ0ks+r+c7bbsOI0OvkjBIoEdUiLdjTl YEjHSBRymfc3z8bwK150xOJj1GFk3B2A/1OIUJlTw1QD4ypdMYxtPY6Jv8gSL06W ZEkW+LkvzgxbfhMxAbSgT82yYsFvN04sZAW99qB+A4xdec1QYiQ2EoUlfCBlDIXG DoaRsDK9juLUfmfDqNk2vl0uSvrnTMOPzcF3VhBgVWf4Feez/CezJEHQLl6IIzeL 1CvAIELhdFFF6jfdD6kerJ4hJD8S4sOtHnRxMrPbA+fmW3rkKmZIHrYllaK3Hx/B jVwoN+uKhLuCBnTskSH494w/LyHajcgXbhsS/Wz1fFrORoDQehJoolag+7Esdw3O jkscCxer+fQ2XWXues5NoSw/f2WledN2NBC1vloebiNgRumWYeCRN84ymIJpbkoR nnWdWz5BVpNNTH7z7ERw1uJ35CAwM25Y0bboqSKfZ2iSmMTMyMUDJ0Ggvcpcyj7P kmH4RQKo42ak1gogYoLlAZkCAwEAAQ== -----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 347807404480731398603792144371084688875176 . . . . . . . . [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 2019-04-04 01:38:51 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-07-03 01:38:51 +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 781143303797459368696477710005219010332122366418430403492979852331469709088995659398985407894323062044983830892102362356246818732462802794246469827121135281772691232711828836247711498518315345671518588174006870045972509601721127170699128206385194577523227509846393369422325677645654848037322184070328707672521739960277353725410164172621531458437413931632498916557139270881314265187879475046023618243441085490722351125097359044270829278615904703283330470363202379717075430054287673482136686742849032926109037348838140446893586867558878891573221441747114643113050249736061772307566815155316776554560656228186006722495981237539197504243525224766854559979738588747803323470870361881291595407169736855972191584714165671766506532388169067970732098582912881390148304800585807584246355769205683184309570686031093308141096158182139049783680527671684631899985421072882180776223664816073997142784404073198308144788060374862146248668496447151655703331726245091322580843145905670346746410021812920892099212341591947826514436104791934118161825606039602505734360192686505274188981173559294607104196292967594901601881430525653688768852271752514373067422099830320286453821067204337851390087540427241926146589941810475625438529981291746144096516112793 . . . . . . . . . . . . . . . . . . . . [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) c258b43a8d430a01ba95c9308223f71a8a98aa56 . . . . . . . . . . . . . . . . [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) 00ef007600e2694bae26e8e94009e8861bb63b83d43ee7fe7488fba48f2893019dddf1dbfe00000169e636991e0000040300473045022008ae7df94ec86e40eb616b0097a9bf455af4f282e2f22903a595220dcb849f70022100eed3c80f34821fec10765197444ac4c8ebededf2cf255250a53d21abb30eb89100750063f2dbcde83bcc2ccf0b728427576b33a48d61778fbd75a638b1c768544bd88d00000169e6369b74000004030046304402205bb425ec2fb7b67296070e7272884bd79b28b82c6c34f5b1d7b7503031798e230220608a79f997960c7b4adf676e0becc4370562542a33794fd64892d220849d5a51 . . . . [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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