yushikai.co.uk
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:96:87:b5:2d:bd:77:b1:e8:8f:fa:8e:8a:46:5b:cc:6a:68 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): 03:96:87:b5:2d:bd:77:b1:e8:8f:fa:8e:8a:46:5b:cc:6a:68Serial Number (int): 312559599346303466579825571278974062717544
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: 41:48:51:b9:4b:05:21:42:a1:99:37:d5:19:6b:ad:a3:36:2f:a7:a5
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): e0:58:70:80:e8:b8:7f:ec:78:39:15:fe:7d:c3:e1:74:8d:2a:83:2f
Fingerprint (sha256): 2f:84:76:d7:b5:64:ce:cf:8f:f6:93:b2:97:fd:8c:8f:00:27:46:52:97:50:c1:6f:47:a2:f7:82:bc:3a:7a:2d
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
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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+gAwIBAgISA5aHtS29d7Hoj/qOikZbzGpoMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xOTA2MjAwMTM5NTdaFw0x OTA5MTgwMTM5NTdaMBkxFzAVBgNVBAMTDnl1c2hpa2FpLmNvLnVrMIICIjANBgkq hkiG9w0BAQEFAAOCAg8AMIICCgKCAgEApAO0/a7c42l1kKeCmM4jV6N5cE/3Qiih QEq4YdGNR3qsj7pW7xEi6D0l6EcvoBL3PWxlVYSdqUJozD/oxt9YQRI71WoIve6f HnSR4KbfjdNqk6kMNZRLlfOu5tz3NXpt24yoj20LGkHv7p975zclu0OjpmwisM4y T5BCHOYm0aWe95WAXSlqWfRAvVyGW/ecW9BgN27Ku0ojNgvZnvpQLYqFbEAihC6c 4aYW9tzxfxdHTUCPKb8YTGAmgiCYtJOZMsU/4XesTIuvo69eMFVqKdQUUNsp6XlH wO3AWpDFL5gKqPMYEW6Zf7AotU5pZtxR8SCmI0Bhvh0u4kieviUNsL6u9oRXt4Jv 525mzNkPq/gZhGt/y/S5qdhRPP7sJc3y4/S4wBcUso/UTADzgeCk4sDPjL410+Y5 S4DJ1by67zt85wjgj/77OaR98EJvbReM9XgZs5etrc6Ut9oCJ3J3pazCBddY+pRz zyJO5NBVcLF10vCwg+k4oQ8/hegxNPAGt3RCdGB2io41OraujddHRJgh5J4Bqrbv gCUVd6GPOfPo5xqr/0atsgzLGGC+UQl2pxLfY5+3G61/iNQDO0mFAmLikWm8oRa8 P7rHsm068hSaNZUbwL2aS5qvwLJt0S1hP7pKO0HWs0PPieSylCVW+sRCmduTLwsm DGAIHbCYQ50CAwEAAaOCAnYwggJyMA4GA1UdDwEB/wQEAwIFoDAdBgNVHSUEFjAU BggrBgEFBQcDAQYIKwYBBQUHAwIwDAYDVR0TAQH/BAIwADAdBgNVHQ4EFgQUQUhR uUsFIUKhmTfVGWutozYvp6UwHwYDVR0jBBgwFoAUqEpqYwR93brm0Tm3pkVl7/Oo 7KEwbwYIKwYBBQUHAQEEYzBhMC4GCCsGAQUFBzABhiJodHRwOi8vb2NzcC5pbnQt eDMubGV0c2VuY3J5cHQub3JnMC8GCCsGAQUFBzAChiNodHRwOi8vY2VydC5pbnQt eDMubGV0c2VuY3J5cHQub3JnLzAtBgNVHREEJjAkghJ3d3cueXVzaGlrYWkuY28u dWuCDnl1c2hpa2FpLmNvLnVrMEwGA1UdIARFMEMwCAYGZ4EMAQIBMDcGCysGAQQB gt8TAQEBMCgwJgYIKwYBBQUHAgEWGmh0dHA6Ly9jcHMubGV0c2VuY3J5cHQub3Jn MIIBAwYKKwYBBAHWeQIEAgSB9ASB8QDvAHUA4mlLribo6UAJ6IYbtjuD1D7n/nSI +6SPKJMBnd3x2/4AAAFrcsFGOQAABAMARjBEAiAMUL6RCQOGMax+OGESwzQpn+Pc IdqUzWQyU+xJjh2LgAIgdrR5dT+9ktWowNptS/sJNfN5wZB/tUvlofRpFYY8MnQA dgBj8tvN6DvMLM8LcoQnV2szpI1hd4+9daY4scdoVEvYjQAAAWtywUYrAAAEAwBH MEUCICjAUs2bL1X2zGDE4SqpOCdFhUQ4PNMUT2NUPFsR78QZAiEAqxfhXM1q5GXQ yg6tjScC28tpc9V9hbZl6igDMRrBFNowDQYJKoZIhvcNAQELBQADggEBAJSBGZn4 EcDhn04oOdUbTXrVXgyX+MZ+XPecJgtg7WNUY3pwZFeP2QP7WN5kG6nlLJkYh/U8 x61eKBJTm5j64h4GEe13SsFIUa9pdBdbezqhvv5iEeStqeLOyRbRc7Er9RJBDNmb bVswJXmBUYzaZDUfi9iICOewLgQ5GYMphXH6C1wQ4mz6f1d6b9yuIlAEFBM4mqRH VHfnNxyraTtkduHmcb5I5IVvBJPkyFSRId2nQkE8/bzcVX/hEcsS3jskxbXyJvYy rMiP0njeRjWjzITiGJ2xQo2/VGQ+RgdkMKI8QHDirJIM2Y4BFYdjn7fBDXOGx3B0 44TXcUUePcTaNcA= -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEApAO0/a7c42l1kKeCmM4j V6N5cE/3QiihQEq4YdGNR3qsj7pW7xEi6D0l6EcvoBL3PWxlVYSdqUJozD/oxt9Y QRI71WoIve6fHnSR4KbfjdNqk6kMNZRLlfOu5tz3NXpt24yoj20LGkHv7p975zcl u0OjpmwisM4yT5BCHOYm0aWe95WAXSlqWfRAvVyGW/ecW9BgN27Ku0ojNgvZnvpQ LYqFbEAihC6c4aYW9tzxfxdHTUCPKb8YTGAmgiCYtJOZMsU/4XesTIuvo69eMFVq KdQUUNsp6XlHwO3AWpDFL5gKqPMYEW6Zf7AotU5pZtxR8SCmI0Bhvh0u4kieviUN sL6u9oRXt4Jv525mzNkPq/gZhGt/y/S5qdhRPP7sJc3y4/S4wBcUso/UTADzgeCk 4sDPjL410+Y5S4DJ1by67zt85wjgj/77OaR98EJvbReM9XgZs5etrc6Ut9oCJ3J3 pazCBddY+pRzzyJO5NBVcLF10vCwg+k4oQ8/hegxNPAGt3RCdGB2io41OraujddH RJgh5J4BqrbvgCUVd6GPOfPo5xqr/0atsgzLGGC+UQl2pxLfY5+3G61/iNQDO0mF AmLikWm8oRa8P7rHsm068hSaNZUbwL2aS5qvwLJt0S1hP7pKO0HWs0PPieSylCVW +sRCmduTLwsmDGAIHbCYQ50CAwEAAQ== -----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 312559599346303466579825571278974062717544 . . . . . . . . [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 2019-06-20 01:39:57 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-09-18 01:39:57 +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 669120702248341430869687273921352680577919635306308772451365120490109448188708072574321356896200022661978893390641609977345826424356749806745264043573505794466002731055445877343851969648662554615168554384086601655311922321579812411636644445531314235735254779971129357738200325226308957922768695004964695969362566789094359997500264450796458111045313487066308925104674816605621691609387585065112092072583054499295775688873180804676749043937731250807349323264954328705635684919563720624380716432413179955714075794437763474628471787626699929702094228740081446183992792500590160337261140296242866284123989793382022163992642163204178737520809640735393118807530839586883165522092024868697475394307001613948343507708318820552340636406445321403753587627089072174231632193816120387439591311152055512056613450853502018522112906394362713524249178405310398318190884575077979039231687350603702465261623853121859474086205780302536620958034454444623763208978138548846791813271739534961842008979824305306330749660844983653821272811665491855342203517011531378448254240035323930008977052045035362066387955363636147248492905014666249816683216690465788547053082011543964425437458195630144974106317415558438204531697378278140810505071469030496654176306077 . . . . . . . . . . . . . . . . . . . . [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) 414851b94b052142a19937d5196bada3362fa7a5 . . . . . . . . . . . . . . . . [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) 00ef007500e2694bae26e8e94009e8861bb63b83d43ee7fe7488fba48f2893019dddf1dbfe0000016b72c14639000004030046304402200c50be9109038631ac7e386112c334299fe3dc21da94cd643253ec498e1d8b80022076b479753fbd92d5a8c0da6d4bfb0935f379c1907fb54be5a1f46915863c327400760063f2dbcde83bcc2ccf0b728427576b33a48d61778fbd75a638b1c768544bd88d0000016b72c1462b0000040300473045022028c052cd9b2f55f6cc60c4e12aa93827458544383cd3144f63543c5b11efc419022100ab17e15ccd6ae465d0ca0ead8d2702dbcb6973d57d85b665ea2803311ac114da . . . . [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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