yushikai.co.uk
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:52:ec:45:af:74:75:2e:b6:14:87:0c:5e:29:ce:65:bb:77 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): 03:52:ec:45:af:74:75:2e:b6:14:87:0c:5e:29:ce:65:bb:77Serial Number (int): 289554071516934586700263236405256876571511
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: 8e:63:90:f3:37:2c:6c:25:78:a1:b6:5e:c4:e9:73:31:a7:c1:31:e9
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): e2:7a:3b:83:12:cb:fd:96:13:9a:59:41:94:fe:c2:46:8e:02:b8:da
Fingerprint (sha256): 59:4e:0d:7b:2b:fd:10:e6:1e:3c:f5:d4:52:c6:7a:12:e4:30:be:b8:62:b9:c7:ee:ed:1a:fa:a4:0f:dd:93:be
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----- MIIGajCCBVKgAwIBAgISA1LsRa90dS62FIcMXinOZbt3MA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xOTA2MjcwMTM5MDVaFw0x OTA5MjUwMTM5MDVaMBkxFzAVBgNVBAMTDnl1c2hpa2FpLmNvLnVrMIICIjANBgkq hkiG9w0BAQEFAAOCAg8AMIICCgKCAgEA6XVW8FWwuBgCSDQqIw2jPigc2as2q5Es vwqtpZW/GJaBz1vEsjm3Ab4ZUOlBsoZfzGCSQ7YqAKmevEnO1ZKNc/rbaKQfXQRj XtQ25wevIBHZj/OJAhCLfa7NWXGcnPlv1aTrRFh9C7NXL0flL7ezkEb934A3yoAh xEjdaT5tDoHJ3QFrDg70UPPfmsAIk6nn1gVfVrM6WBR3RakvpQ1zYvQCcgXDOim8 rBfEPJXGhuwQ1mvSPoSBYtrPuP9++F5GMtbo1clKP7M9UYfiws0/irbV20YztRd6 NES1D+JqKBJsL+ucezXEETrQKT7Tj1FbGnw2O6grSzy6NvgYPJEOq/xHABLsQbzG dxzyld6jo5odASp1X6VMjPnfZnzYIycvtU489NL7BVZxQxeo1wYjEJ/Z+RJrEzq0 XUtuJj0s4dHylgTZiuR8P5OwqHHG2KDhAcmfnXEF6HsaXEfxcLqEBS6YX+A+aiDM zKtL1xdD5QUWMDnXDz/oCymHBCapBqnBYfO5JpRUQy+qnJXi0f/F6R2g5w0B1AVy KZHvHoAsdimxvgjRovhzFwIicw4S2PnRKhgl4NrnzpmNtTovD18atIhIM1pXNqpU k4dQixY4MHxQs5PuXiYZ/e4Z44n7tvv0sK7CO9+zWZcYs9qCWYBjPgnaEm3S1SoU xVUmiDzRHMkCAwEAAaOCAnkwggJ1MA4GA1UdDwEB/wQEAwIFoDAdBgNVHSUEFjAU BggrBgEFBQcDAQYIKwYBBQUHAwIwDAYDVR0TAQH/BAIwADAdBgNVHQ4EFgQUjmOQ 8zcsbCV4obZexOlzMafBMekwHwYDVR0jBBgwFoAUqEpqYwR93brm0Tm3pkVl7/Oo 7KEwbwYIKwYBBQUHAQEEYzBhMC4GCCsGAQUFBzABhiJodHRwOi8vb2NzcC5pbnQt eDMubGV0c2VuY3J5cHQub3JnMC8GCCsGAQUFBzAChiNodHRwOi8vY2VydC5pbnQt eDMubGV0c2VuY3J5cHQub3JnLzAtBgNVHREEJjAkghJ3d3cueXVzaGlrYWkuY28u dWuCDnl1c2hpa2FpLmNvLnVrMEwGA1UdIARFMEMwCAYGZ4EMAQIBMDcGCysGAQQB gt8TAQEBMCgwJgYIKwYBBQUHAgEWGmh0dHA6Ly9jcHMubGV0c2VuY3J5cHQub3Jn MIIBBgYKKwYBBAHWeQIEAgSB9wSB9ADyAHcAdH7agzGtMxCRIZzOJU9CcMK//V5C IAjGNzV55hB7zFYAAAFrls0BUQAABAMASDBGAiEAhjGVmnMtdvg0ZB++javf3udY 05gNnj8eXngy7vnPEDICIQCxjovmmr//kXRwrRX8rsHsRWIW8MZjqbDNTHni5CwH PwB3AGPy283oO8wszwtyhCdXazOkjWF3j711pjixx2hUS9iNAAABa5bM/0sAAAQD AEgwRgIhAPa6PGKvVZ3O1AcvNz7dqbXLzFmX0kc9Kw11eI9md55qAiEA6JM36o4b +fxZSgtnYgJMM2amDyjmTrlH/N7YXvcltdYwDQYJKoZIhvcNAQELBQADggEBAGfy zLW1ds9HyTZUVDZrCA8SO/YRfW1o6imH8QYCwOzK/gSzjfQBTpoAcKvIDXTGmMYX zZB41cQtcsKDKYzcWSkT5ky1zvE1fk/+TGyZ3tYkfJYz3jHdP7p9ZY0jI94UP9u6 jcoNssgD6cbZn0iizSrGKiyta6RWs9EcWlzZQe4lhaeBvttm5Yf+fpV0s87d0Qxf c+/mhRrgQCT0b9Hbju0HaGZdnbIW3ZzWC6rm02/NbPkGslcbNbU3Hx6z1w1K/0b4 lZ+ffhtgFvcCEiJLhK7s65Aume5ETqk5OTYVy3IAa7ETkjeYWYLcaiA8gmVfWp6H 83hOyICoXmZRtrCC5I8= -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEA6XVW8FWwuBgCSDQqIw2j Pigc2as2q5EsvwqtpZW/GJaBz1vEsjm3Ab4ZUOlBsoZfzGCSQ7YqAKmevEnO1ZKN c/rbaKQfXQRjXtQ25wevIBHZj/OJAhCLfa7NWXGcnPlv1aTrRFh9C7NXL0flL7ez kEb934A3yoAhxEjdaT5tDoHJ3QFrDg70UPPfmsAIk6nn1gVfVrM6WBR3RakvpQ1z YvQCcgXDOim8rBfEPJXGhuwQ1mvSPoSBYtrPuP9++F5GMtbo1clKP7M9UYfiws0/ irbV20YztRd6NES1D+JqKBJsL+ucezXEETrQKT7Tj1FbGnw2O6grSzy6NvgYPJEO q/xHABLsQbzGdxzyld6jo5odASp1X6VMjPnfZnzYIycvtU489NL7BVZxQxeo1wYj EJ/Z+RJrEzq0XUtuJj0s4dHylgTZiuR8P5OwqHHG2KDhAcmfnXEF6HsaXEfxcLqE BS6YX+A+aiDMzKtL1xdD5QUWMDnXDz/oCymHBCapBqnBYfO5JpRUQy+qnJXi0f/F 6R2g5w0B1AVyKZHvHoAsdimxvgjRovhzFwIicw4S2PnRKhgl4NrnzpmNtTovD18a tIhIM1pXNqpUk4dQixY4MHxQs5PuXiYZ/e4Z44n7tvv0sK7CO9+zWZcYs9qCWYBj PgnaEm3S1SoUxVUmiDzRHMkCAwEAAQ== -----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 289554071516934586700263236405256876571511 . . . . . . . . [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 2019-06-27 01:39:05 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-09-25 01:39:05 +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 952427004654655174259374856694682870354136228531404398626669559352706019205568130718677046250182824745446676326345233243877697917583924049171371924557569078560836181182725816685499592075675518434535547236223854818377963363827316712084168805174553531140453211401792300291588987910651695178680828133968055901705368076819302439388313236538432978714928270991136459184320352638817523419583044848415039107057140049951206361192738933892271098406695777226355415178859237166287410886290677517349938445051464611412560860832856765323552677831118555618392459464034881368439520699643733814434284773673286705723167787054751080535774419692178913732324062998885524753041198801903141824786204541733704034014048576132429482128119782928571307261352099982108209805274286462027434312409993787891340002548041871991229239899559361575550615692683110649933894017885038891393777966730265494765922385893563666272539066958534925375033495372414666276097797206378682060492370413886236613637739539913865795183352488000177794725155854360834368704597504894233493560782392588028822257425348120887201712787303026424041737652518550256099327431966909081165841183695220610217083654195228522045160328794748729180663319689778929981132839417286273942802681175806365226048713 . . . . . . . . . . . . . . . . . . . . [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) 8e6390f3372c6c2578a1b65ec4e97331a7c131e9 . . . . . . . . . . . . . . . . [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 (247 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (244 bytes) 00f2007700747eda8331ad331091219cce254f4270c2bffd5e422008c6373579e6107bcc560000016b96cd015100000403004830460221008631959a732d76f834641fbe8dabdfdee758d3980d9e3f1e5e7832eef9cf1032022100b18e8be69abfff917470ad15fcaec1ec456216f0c663a9b0cd4c79e2e42c073f00770063f2dbcde83bcc2ccf0b728427576b33a48d61778fbd75a638b1c768544bd88d0000016b96ccff4b0000040300483046022100f6ba3c62af559dced4072f373edda9b5cbcc5997d2473d2b0d75788f66779e6a022100e89337ea8e1bf9fc594a0b6762024c3366a60f28e64eb947fcded85ef725b5d6 . . . . [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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