yushikai.co.uk
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:b4:6b:97:d9:7d:9e:1e:89:30:81:14:ac:48:64:22:aa:38 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:b4:6b:97:d9:7d:9e:1e:89:30:81:14:ac:48:64:22:aa:38Serial Number (int): 322730699684659627974532581578429050300984
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: 2e:9d:1c:2f:36:49:a3:6c:d5:e3:51:92:d6:51:76:00:bc:e2:13:9d
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): 8f:69:fc:71:3e:4f:27:a5:d5:eb:eb:3c:cc:a8:66:c0:d5:60:ee:fb
Fingerprint (sha256): 4e:32:68:5a:cf:63:ca:b2:02:c9:fd:7d:c6:63:2a:ab:ff:8a:be:6c:b3:c8:e2:52:fc:73:0c:7c:02:46:e9:82
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
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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----- MIIGZjCCBU6gAwIBAgISA7Rrl9l9nh6JMIEUrEhkIqo4MA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xOTA1MjkwMTM5MTlaFw0x OTA4MjcwMTM5MTlaMBkxFzAVBgNVBAMTDnl1c2hpa2FpLmNvLnVrMIICIjANBgkq hkiG9w0BAQEFAAOCAg8AMIICCgKCAgEA8jKpo02R4sRNQ+t/YAaLoYoWcNDa0i11 2Cgpx+k6EzB8XHIXuRN0wupWNyneGqZar629NwAhPoX7tHRYvSi4/1D52+ZVdZ0W vZiytFruDS47XgWdqbhQj9YOpkNQvKZDjO+2V4trRxZovJp03Wuw+rtxFj6S+BFs 8I6+QxRSxCMYXt1wGJvNkb/Bgu4obv4WBelbTVv0YRuetgtprczJ+Dyzno7vtMd1 JMD9/VckOzeYLWsBOrlbN4pqKd+Iy3sHBUGvJfAVDX6hi0uLYYv+1YTSkrI+ROyo aORzMxBKJvx0iop1CAIj72VvwOE1D2EGXYnmERHm0yHkH0xYnZxywb2CN23e5WYK ePBVyBsRrASO9tzmcGFpGeLPkivs/Lp1Uuo2yvFGnEAz3v7lpochqURbX9FOPQ4d T2rUOdjzqhiADpTOSoGchk2od/bJjB+zw+YnXQJR7I32Ep6R4ifX7UYpvlp8dPaf BymaS6KaEr/AQ+320PNHzZ4qk1dJEyWG2Zkm2rpEKDJPe9CvEYnt80lhzT6rQAd9 e8wJZS3A7EHe1Y+UDg6SqmkVFswUpjqjJ+srCfv2tpy4eu6SXSWD1aKdTYGl/z51 Zbd89M3o8XOCzUwlsRX2hKJXWxzC/VLA854LZrJlUiPnZ8CTRfjcxB1T2yJAv3aP UykkzxIugV0CAwEAAaOCAnUwggJxMA4GA1UdDwEB/wQEAwIFoDAdBgNVHSUEFjAU BggrBgEFBQcDAQYIKwYBBQUHAwIwDAYDVR0TAQH/BAIwADAdBgNVHQ4EFgQULp0c LzZJo2zV41GS1lF2ALziE50wHwYDVR0jBBgwFoAUqEpqYwR93brm0Tm3pkVl7/Oo 7KEwbwYIKwYBBQUHAQEEYzBhMC4GCCsGAQUFBzABhiJodHRwOi8vb2NzcC5pbnQt eDMubGV0c2VuY3J5cHQub3JnMC8GCCsGAQUFBzAChiNodHRwOi8vY2VydC5pbnQt eDMubGV0c2VuY3J5cHQub3JnLzAtBgNVHREEJjAkghJ3d3cueXVzaGlrYWkuY28u dWuCDnl1c2hpa2FpLmNvLnVrMEwGA1UdIARFMEMwCAYGZ4EMAQIBMDcGCysGAQQB gt8TAQEBMCgwJgYIKwYBBQUHAgEWGmh0dHA6Ly9jcHMubGV0c2VuY3J5cHQub3Jn MIIBAgYKKwYBBAHWeQIEAgSB8wSB8ADuAHUAb1N2rDHwMRnYmQCkURX/dxUcEdkC wQApBo2yCJo32RMAAAFrAXTLuAAABAMARjBEAiBU6JhlC5PpOV/U2BaWrv8xCUxv /CE/QveXbYOcuTL4zgIgB++mSTRbYx9nNC9Ro0xnnEagOrRQGL7phHzizxLpZQEA dQBj8tvN6DvMLM8LcoQnV2szpI1hd4+9daY4scdoVEvYjQAAAWsBdMxIAAAEAwBG MEQCIB+Gh3m6QXG08uIamOmzhLHiIt0ogU74l5fSntG2BvX0AiA56b8Xtb0eyjPf w7s4gSx2J62vJLJLNH0FFAt0qZCm4jANBgkqhkiG9w0BAQsFAAOCAQEAY8h0c+ND 1Ie8qd15uwEPtjAEZh77MHcsHsbDhcaQfL/85dHBEBZoHWppN6R4VdShmKDAgpqH odqjhGUfw3/+7VBmQ3eRqCbKPpcaUR0HxSbn8WP7JLPZBv8NbQfkBEB1txPBEnsi EPxWJ5nb7jdaJ1WFLnCCRP02IrsZKukEcy+fjpgZM8OGBvPjYRhqiX0D+7feT/Tx j2Uz4BRxW8asdokQ/q59KFofowtusQKL8y5D2PH4iu8IFR2dlXe4ndMgmH4ikEZt lfeJkL3nswUNeBh5jyhT9s3Fq+F5tUviKiKOqvKq14KASbnBFHWGTLxhkQzpuLd+ A89UroyUfRPJNg== -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEA8jKpo02R4sRNQ+t/YAaL oYoWcNDa0i112Cgpx+k6EzB8XHIXuRN0wupWNyneGqZar629NwAhPoX7tHRYvSi4 /1D52+ZVdZ0WvZiytFruDS47XgWdqbhQj9YOpkNQvKZDjO+2V4trRxZovJp03Wuw +rtxFj6S+BFs8I6+QxRSxCMYXt1wGJvNkb/Bgu4obv4WBelbTVv0YRuetgtprczJ +Dyzno7vtMd1JMD9/VckOzeYLWsBOrlbN4pqKd+Iy3sHBUGvJfAVDX6hi0uLYYv+ 1YTSkrI+ROyoaORzMxBKJvx0iop1CAIj72VvwOE1D2EGXYnmERHm0yHkH0xYnZxy wb2CN23e5WYKePBVyBsRrASO9tzmcGFpGeLPkivs/Lp1Uuo2yvFGnEAz3v7lpoch qURbX9FOPQ4dT2rUOdjzqhiADpTOSoGchk2od/bJjB+zw+YnXQJR7I32Ep6R4ifX 7UYpvlp8dPafBymaS6KaEr/AQ+320PNHzZ4qk1dJEyWG2Zkm2rpEKDJPe9CvEYnt 80lhzT6rQAd9e8wJZS3A7EHe1Y+UDg6SqmkVFswUpjqjJ+srCfv2tpy4eu6SXSWD 1aKdTYGl/z51Zbd89M3o8XOCzUwlsRX2hKJXWxzC/VLA854LZrJlUiPnZ8CTRfjc xB1T2yJAv3aPUykkzxIugV0CAwEAAQ== -----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 322730699684659627974532581578429050300984 . . . . . . . . [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 2019-05-29 01:39:19 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-08-27 01:39:19 +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 988081229974981780451612733396181385671636843441841313931606524438827474765517533104257178426971626935469923158068158286808231977672454643485720617038606407782071683860363603601962750853755517193179566778588872728695472467549246133824389129526808223254114511219654280225278818050345683442884030009305986109915646213673230349220282236285606362670372988132853029741724646644438020699061386185398684684583802773592756989444819907824977616874595835436439289243141801567045544164001879088606977294762437989737731391171149214192891824930458825607626145723326253358739168000184401812533187244559126711027401039717915956468935766767642262361714930369147736401653380311916664928366019625005331305205544630438383933049170322891704898894056689737031112830581880476791870145880528151026981040483339255608172362597107441051147446624269422766247684331639310011115958393021428137133639278735160840820865188136447227227809819310512330349310166125867501409092526350404498495238153397660222570414349636961960362563978541132085750651947514367205591602514212650230823309970326375119673584428817150925204739707602337271981708756763209156512145913079925343164518093379885224094588102481139588799427859824937156323916574188821187607455630106653302148989277 . . . . . . . . . . . . . . . . . . . . [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) 2e9d1c2f3649a36cd5e35192d6517600bce2139d . . . . . . . . . . . . . . . . [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 (243 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (240 bytes) 00ee0075006f5376ac31f03119d89900a45115ff77151c11d902c10029068db2089a37d9130000016b0174cbb80000040300463044022054e898650b93e9395fd4d81696aeff31094c6ffc213f42f7976d839cb932f8ce022007efa649345b631f67342f51a34c679c46a03ab45018bee9847ce2cf12e9650100750063f2dbcde83bcc2ccf0b728427576b33a48d61778fbd75a638b1c768544bd88d0000016b0174cc48000004030046304402201f868779ba4171b4f2e21a98e9b384b1e222dd28814ef89797d29ed1b606f5f4022039e9bf17b5bd1eca33dfc3bb38812c7627adaf24b24b347d05140b74a990a6e2 . . . . [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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