yushikai.co.uk
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:f4:50:91:7c:ab:f4:fe:b0:f9:de:c3:fa:82:5c:93:54:28 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:f4:50:91:7c:ab:f4:fe:b0:f9:de:c3:fa:82:5c:93:54:28Serial Number (int): 344472848975339634732820261026619911787560
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: f8:ee:f3:c5:32:29:d7:fb:43:ac:c4:eb:4a:a0:ae:82:c8:9e:ad:54
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): b4:b3:64:ec:b1:d3:09:c8:5b:01:1e:79:17:2f:ba:e4:3a:8b:07:dd
Fingerprint (sha256): 4d:6d:81:b7:e4:43:1f:83:95:2d:d7:06:2c:9e:7d:73:4c:ce:e0:63:b6:e1:fd:9f:ff:12:1b:29:f8:31:c3:b9
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
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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----- MIIGaDCCBVCgAwIBAgISA/RQkXyr9P6w+d7D+oJck1QoMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xOTA4MTUwMTUzMzdaFw0x OTExMTMwMTUzMzdaMBkxFzAVBgNVBAMTDnl1c2hpa2FpLmNvLnVrMIICIjANBgkq hkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAxYZfQcTQO9wo+mSI/GNf48A16i80KaEt 1B0VO4qTpKQ/jIN4oEcstH3N1BgJdLgWtJDQ45ljTxKETvEpdpvfwuxSWZa5GiI+ z1w2elZa45Ov1XW67DArGmHqRNDOFfrp1hlNons3348jyXFkH/XCn5BPweEWbKGW JxfJD4o0DyZ87/5tXdtzcW7UcMe0GGFi2SUF0lha2ND9itQCsmXsvx8zzG76363E r1BrQyxRqpdF3hS3kEz3rWq6jOIpz2BXSu8TMngaOSfXs9VX4t5oit19GzI6vVe2 U2hqAnHSL3t+k/YLtx8eHjLpqvM8MVpKzwdV6IQfb8qTkLySO4CVNWApJEi1tS34 mdfqXCNRZu+aVy/eN9rrbeHj5H4vfoQb2UAuJkT7hZRxQvAWbsKJDPcN99Fybo5M hLqtzrV2gZ6TymiQx5T1l9ElSzsxh/0xvDQyOnCmu0bsmUQN3R9gc8fU4zrZ2QTl DgrbBsKCxZ00tLfTUH+ZGe6jD+doTIXbOdqOyuWYtBnZ0NpdU2EPOFIsIlERgoEl rx4ibHJIS8qd17ixsaZEQl8LvaUwIHyQ/rDLQzNzBkN9hSxBaivBnyp7DDlmHV+z DVKhT0qFBwM3Q94U0ZDgvaLRLZyZ6HdNwAfFohIJ5zcpUVzUspVLFlfAW17sz3zN 5G+QiIppnq0CAwEAAaOCAncwggJzMA4GA1UdDwEB/wQEAwIFoDAdBgNVHSUEFjAU BggrBgEFBQcDAQYIKwYBBQUHAwIwDAYDVR0TAQH/BAIwADAdBgNVHQ4EFgQU+O7z xTIp1/tDrMTrSqCugsierVQwHwYDVR0jBBgwFoAUqEpqYwR93brm0Tm3pkVl7/Oo 7KEwbwYIKwYBBQUHAQEEYzBhMC4GCCsGAQUFBzABhiJodHRwOi8vb2NzcC5pbnQt eDMubGV0c2VuY3J5cHQub3JnMC8GCCsGAQUFBzAChiNodHRwOi8vY2VydC5pbnQt eDMubGV0c2VuY3J5cHQub3JnLzAtBgNVHREEJjAkghJ3d3cueXVzaGlrYWkuY28u dWuCDnl1c2hpa2FpLmNvLnVrMEwGA1UdIARFMEMwCAYGZ4EMAQIBMDcGCysGAQQB gt8TAQEBMCgwJgYIKwYBBQUHAgEWGmh0dHA6Ly9jcHMubGV0c2VuY3J5cHQub3Jn MIIBBAYKKwYBBAHWeQIEAgSB9QSB8gDwAHYAb1N2rDHwMRnYmQCkURX/dxUcEdkC wQApBo2yCJo32RMAAAFskzHp8gAABAMARzBFAiEA9mX/2xyT9UvnhZwKK/pOD5hx G5WpAtiWblRSxLNTt0cCIFw07IMKgkgEnZ/X2vN0ae1/ijcm6SmsgxkD6q0E0Bkz AHYAKTxRllTIOWW6qlD8WAfUt2+/WHopctykwwz05UVH9HgAAAFskzHp8QAABAMA RzBFAiBbvsVjp21zJImYA85O9p0AdNYdhyoQDy09tUjtevz/BAIhAKdErEZtCLfb d8RfJqxmuK4G9QQvf7PeG6G+RBWvfztwMA0GCSqGSIb3DQEBCwUAA4IBAQCS71a3 nYCOixmybnPcGm3L9t/cdEKKgSyS0SL6V6et9lz8r0PK0SebEWcmgTM05xsOy8P2 Yxr6UqrlMcFaF0VXbYMZU6qJFjT753RtR9n7TlS1gJ72Z8614o70YjCDqqF06CeV BAUowC2g6VgqTaWAGd2GkXoqWcnuZRns0gpP2hgwlIj4zx/n0elkhMJxQ0JZXN2c sY1/0+X9RzRPTQmMXa7CEfzyhDJbkqxbPKD2IU9quxc9ncP2j9/C2YUJylHWdtfa q9DdXThAafFUeJ8mKNXCn5pkK4aXloTc3gg1ZSkfm8WUGFpLoiT+2zSkxO3pmfbc 2yIshZRPUW42jK6+ -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAxYZfQcTQO9wo+mSI/GNf 48A16i80KaEt1B0VO4qTpKQ/jIN4oEcstH3N1BgJdLgWtJDQ45ljTxKETvEpdpvf wuxSWZa5GiI+z1w2elZa45Ov1XW67DArGmHqRNDOFfrp1hlNons3348jyXFkH/XC n5BPweEWbKGWJxfJD4o0DyZ87/5tXdtzcW7UcMe0GGFi2SUF0lha2ND9itQCsmXs vx8zzG76363Er1BrQyxRqpdF3hS3kEz3rWq6jOIpz2BXSu8TMngaOSfXs9VX4t5o it19GzI6vVe2U2hqAnHSL3t+k/YLtx8eHjLpqvM8MVpKzwdV6IQfb8qTkLySO4CV NWApJEi1tS34mdfqXCNRZu+aVy/eN9rrbeHj5H4vfoQb2UAuJkT7hZRxQvAWbsKJ DPcN99Fybo5MhLqtzrV2gZ6TymiQx5T1l9ElSzsxh/0xvDQyOnCmu0bsmUQN3R9g c8fU4zrZ2QTlDgrbBsKCxZ00tLfTUH+ZGe6jD+doTIXbOdqOyuWYtBnZ0NpdU2EP OFIsIlERgoElrx4ibHJIS8qd17ixsaZEQl8LvaUwIHyQ/rDLQzNzBkN9hSxBaivB nyp7DDlmHV+zDVKhT0qFBwM3Q94U0ZDgvaLRLZyZ6HdNwAfFohIJ5zcpUVzUspVL FlfAW17sz3zN5G+QiIppnq0CAwEAAQ== -----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 344472848975339634732820261026619911787560 . . . . . . . . [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 2019-08-15 01:53:37 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-11-13 01:53:37 +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 805831249875225486554050857856912822261270869516445451482917009521662972989353923118591815853937412623985272575732862886451148671268785630971620414862428993542670852737717497119387971289932340626193260602481059815244179847101313224199562437041357069174635087358635412436549938471555447277350078818839940228325571492293610292769906599891496519113859228743009511648437493375517262528213653601887022800515316602026446274769707268575294259441648243915851712352178438540215886800608881207195999060607323374888571775269867673698994164260055395037407830773559626002922249162491635313329227102034465607690808925549889452443166475185434712543575564001816763293519214611283896154088953841079343968849521858496523469538143681609539951515880918909526626652201119933848273348177255353674692129426302314026012615978058479681284913563277011522188748056140301751426385846016740365139135552599828380176055061689156300406733526530578351889395690432736419025364484545295733741015744553633329420586327315480489006470279728365741546812172751627873102913474046611840233648190252196937807826535601562764561170580178194353575253661870634870410248098593746763427971721111275951486298403440497463457456506164749107531273743737816145348786895197858219220901549 . . . . . . . . . . . . . . . . . . . . [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) f8eef3c53229d7fb43acc4eb4aa0ae82c89ead54 . . . . . . . . . . . . . . . . [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) 00f00076006f5376ac31f03119d89900a45115ff77151c11d902c10029068db2089a37d9130000016c9331e9f20000040300473045022100f665ffdb1c93f54be7859c0a2bfa4e0f98711b95a902d8966e5452c4b353b74702205c34ec830a8248049d9fd7daf37469ed7f8a3726e929ac831903eaad04d01933007600293c519654c83965baaa50fc5807d4b76fbf587a2972dca4c30cf4e54547f4780000016c9331e9f1000004030047304502205bbec563a76d7324899803ce4ef69d0074d61d872a100f2d3db548ed7afcff04022100a744ac466d08b7db77c45f26ac66b8ae06f5042f7fb3de1ba1be4415af7f3b70 . . . . [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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