yushikai.co.uk
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:61:88:af:f5:c5:2f:1f:2a:41:1b:be:89:cf:78:82:7a:51 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): 03:61:88:af:f5:c5:2f:1f:2a:41:1b:be:89:cf:78:82:7a:51Serial Number (int): 294525936030801647431040715502399439141457
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: d5:74:11:f2:6a:cd:31:d6:54:01:c3:15:e0:5b:52:56:24:00:47:23
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): 50:24:92:e1:99:50:2c:75:d4:78:e2:e7:4e:33:8b:62:9f:43:12:4d
Fingerprint (sha256): 4b:27:86:2c:17:ab:d1:85:64:77:28:bc:59:06:fb:3a:fe:81:e8:f1:69:8d:a5:65:03:5c:2b:3d:b2:d9:f1:7c
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+gAwIBAgISA2GIr/XFLx8qQRu+ic94gnpRMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xOTAzMTgwMjM5MjZaFw0x OTA2MTYwMjM5MjZaMBkxFzAVBgNVBAMTDnl1c2hpa2FpLmNvLnVrMIICIjANBgkq hkiG9w0BAQEFAAOCAg8AMIICCgKCAgEA8uu2EcyfONu14+4CNv5p6qHEy3K4FGLr NLBuNZ/zz627LXJJQn9bQsr5UERCy+TkVtHmocCb8RIQ5cflTeO73MCGknIKuIbj pAHwlO7u2p4XHvo1oP3E67wLR6QSqSEITYKqzJXG8jElMOulW+4UosmSwK+KmXUh yyM28C4i6K8IAoXersR/s65NaNLsKRphCXog5NB4RBuuviYAuCc1tibKylV/DUwp nAMCiYY+4FXHelD6t/+oYg2dm4pm11x+eA1c7L+AeGg0frYviR3Ni0F9Bs/9QE/a Zj0SiQ7mcb8HKux2GaU52xtSYcpFcLyX00e+tbUaMf49aDdXtFjV5GzraXTKZ2+a X7Om4nJgtoGO7CDplKv+FXEggHF5mJZjqA+Y+yjbcjjH6y6DR0MxtlqEsunlZvND dffurt9tSYj6OxbjhnzWGmQyj0msRic9GPiTuszfBtU9FQTdPmez67okk/wQL4/F bR/nW2e0Q+J3x+hO5HPXtUAYKxScmkgsb27irGB6MyB05VXF7Ogmc47dJo2Piyb3 EQ/zArFIVFmSBkxNBu6HIEuIbIiAUF7fTGGOBYUyuOHsrdBUWT04jzjR9rhgolEd S/mNxCK+IVv/vjiD8/D2C/P6OZH4r1wt2OeiCImOC+vOkvWyUGqPiIilY5QRXk1K 9iPKYy5k8hMCAwEAAaOCAnYwggJyMA4GA1UdDwEB/wQEAwIFoDAdBgNVHSUEFjAU BggrBgEFBQcDAQYIKwYBBQUHAwIwDAYDVR0TAQH/BAIwADAdBgNVHQ4EFgQU1XQR 8mrNMdZUAcMV4FtSViQARyMwHwYDVR0jBBgwFoAUqEpqYwR93brm0Tm3pkVl7/Oo 7KEwbwYIKwYBBQUHAQEEYzBhMC4GCCsGAQUFBzABhiJodHRwOi8vb2NzcC5pbnQt eDMubGV0c2VuY3J5cHQub3JnMC8GCCsGAQUFBzAChiNodHRwOi8vY2VydC5pbnQt eDMubGV0c2VuY3J5cHQub3JnLzAtBgNVHREEJjAkghJ3d3cueXVzaGlrYWkuY28u dWuCDnl1c2hpa2FpLmNvLnVrMEwGA1UdIARFMEMwCAYGZ4EMAQIBMDcGCysGAQQB gt8TAQEBMCgwJgYIKwYBBQUHAgEWGmh0dHA6Ly9jcHMubGV0c2VuY3J5cHQub3Jn MIIBAwYKKwYBBAHWeQIEAgSB9ASB8QDvAHUAdH7agzGtMxCRIZzOJU9CcMK//V5C IAjGNzV55hB7zFYAAAFpjuHzHwAABAMARjBEAiBQzAqlUp6fL3V+VjgEYx644typ 1VWSma7VyF/n3lcsiwIgSeKd7z84UFqfX3VNZrFjRVulC4+tqbuZOJgggXrb6esA dgBj8tvN6DvMLM8LcoQnV2szpI1hd4+9daY4scdoVEvYjQAAAWmO4fNwAAAEAwBH MEUCIFsHklqclRvquRrLOMeucBoBcja6pYClF0m6Uysv2FErAiEApRvb8heEbg4p xoTtfLjPQHlyRax/F3M/rHXgdBY43TwwDQYJKoZIhvcNAQELBQADggEBAEmeszNm YHkRrI01mA2PqHtKrGa5LTb4z0ghdA/V/s3Xflup8swiDjLN7Bkz4/WyHTiduDd0 0XSppjdpmlagwVWAw/KRuaweUSOudQsKAahSi5WZAxd8odb0eQYzZxPmBbcNvDni QKGTXG5Jau5RC5cdG8Jhl77uArEU2LxFIreoXP8hGaNILPz0ehQC+kOn/rPYArgP +kr6m+rqTNsqyiRn2vmdKt1W/7bK3fWlpAJlnVw/iONT/jVYOlwnpSSqxubh1PAq 76Xw+pH1dUKKmtMuWaQ5k+ehwPNQXtAT4f2eq0P2EercqpKD1JQfPBE7rOoMh7Vw nyLIBCFRpnUZhPw= -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEA8uu2EcyfONu14+4CNv5p 6qHEy3K4FGLrNLBuNZ/zz627LXJJQn9bQsr5UERCy+TkVtHmocCb8RIQ5cflTeO7 3MCGknIKuIbjpAHwlO7u2p4XHvo1oP3E67wLR6QSqSEITYKqzJXG8jElMOulW+4U osmSwK+KmXUhyyM28C4i6K8IAoXersR/s65NaNLsKRphCXog5NB4RBuuviYAuCc1 tibKylV/DUwpnAMCiYY+4FXHelD6t/+oYg2dm4pm11x+eA1c7L+AeGg0frYviR3N i0F9Bs/9QE/aZj0SiQ7mcb8HKux2GaU52xtSYcpFcLyX00e+tbUaMf49aDdXtFjV 5GzraXTKZ2+aX7Om4nJgtoGO7CDplKv+FXEggHF5mJZjqA+Y+yjbcjjH6y6DR0Mx tlqEsunlZvNDdffurt9tSYj6OxbjhnzWGmQyj0msRic9GPiTuszfBtU9FQTdPmez 67okk/wQL4/FbR/nW2e0Q+J3x+hO5HPXtUAYKxScmkgsb27irGB6MyB05VXF7Ogm c47dJo2Piyb3EQ/zArFIVFmSBkxNBu6HIEuIbIiAUF7fTGGOBYUyuOHsrdBUWT04 jzjR9rhgolEdS/mNxCK+IVv/vjiD8/D2C/P6OZH4r1wt2OeiCImOC+vOkvWyUGqP iIilY5QRXk1K9iPKYy5k8hMCAwEAAQ== -----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 294525936030801647431040715502399439141457 . . . . . . . . [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 2019-03-18 02:39:26 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-06-16 02:39:26 +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 991030184132564746373157568818708526192658559666843403452976321878128474236657972185084502604125728263656933093699363191483754181787684557631714511976227743421293412118498040860550817626769035000778546390258130858593388603367960245192982543333284950229156733406050049060376202340514011587411346290320559240388783531373493949552414851187276837146119505241790908951168011633720193160568099316244736577762257992116874937175965520465831644451065474758925793218162422773833614095538371539298195220049305176626304281047662816534236589698724608609943162424674200801174697131992082091602318888746249692003763616534661020544691626269668787445852268125705380299802357450732542524070624598462614118132191644176347997122968399274493374906881053206683493170729910160472565789102761693983122626766698861317030548174483074392348087028613538018553415616140129409673169368076334212759331745658404923092909678966702462769209763277506460973452649640170186533656694128918090436084544829471306829194168146926003996887764181842259492821728524272609497752904359392226536663956398442699230892017870835918937642800198288124267925911184527232431401635287947033824987995709825669775730859654406900227046463197447009505295467276398847117392290332005357093974547 . . . . . . . . . . . . . . . . . . . . [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) d57411f26acd31d65401c315e05b525624004723 . . . . . . . . . . . . . . . . [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) 00ef007500747eda8331ad331091219cce254f4270c2bffd5e422008c6373579e6107bcc56000001698ee1f31f0000040300463044022050cc0aa5529e9f2f757e563804631eb8e2dca9d5559299aed5c85fe7de572c8b022049e29def3f38505a9f5f754d66b163455ba50b8fada9bb99389820817adbe9eb00760063f2dbcde83bcc2ccf0b728427576b33a48d61778fbd75a638b1c768544bd88d000001698ee1f370000004030047304502205b07925a9c951beab91acb38c7ae701a017236baa580a51749ba532b2fd8512b022100a51bdbf217846e0e29c684ed7cb8cf40797245ac7f17733fac75e0741638dd3c . . . . [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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