yushikai.co.uk
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:7d:db:7b:de:ca:27:ea:3f:66:65:b4:33:04:db:03:e3:39 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): 03:7d:db:7b:de:ca:27:ea:3f:66:65:b4:33:04:db:03:e3:39Serial Number (int): 304163897762699918174732804879807322252089
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: a1:39:cb:20:a9:82:4f:f4:3c:04:b6:10:9c:f8:4b:04:da:f5:77:d2
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): 28:02:27:0e:9b:ad:72:71:2c:dd:21:3d:fe:1e:e9:f5:91:99:0b:be
Fingerprint (sha256): 61:f8:c6:35:83:f0:cd:be:f9:d1:e3:b8:b9:d3:4d:a1:a6:0b:f9:6a:80:ac:32:37:f4:83:78:a4:d6:c2:f2: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
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----- MIIGaDCCBVCgAwIBAgISA33be97KJ+o/ZmW0MwTbA+M5MA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xOTA3MDQwMTM4MDVaFw0x OTEwMDIwMTM4MDVaMBkxFzAVBgNVBAMTDnl1c2hpa2FpLmNvLnVrMIICIjANBgkq hkiG9w0BAQEFAAOCAg8AMIICCgKCAgEA4R5rVkoy2A3BHk17eP789VQUQFuK9jwl pbKXZ8dMlXz3EmruSYkNEgDzRd9AdLoGm/0iW2pURE9C4h+2cmV4vrqmCopw55hN elyFei8NYbnffflHMQ1Um2L7YBqNyDgLWMxwnjJ/4J/GPS/SFvHKkafZlpimmDpz yHioqHzwn39W9pd2yckON1RhwmSbVTkoBz9N1UWNQXdpimPlGtRC5dViCMYsnJ4S MLoR1G+t7gKZuDvCirdBKmed/ThSvDgZEDa5tmXcjLltss3rPpqkmIxTgiaPABlm MAlBiKr+/MUgyfFl/3M1/qPVDSlljT2UwrQFXjBfnnGjGWvzTRb7I32m1JzZ7VWD o419lJ2It0xC/UrdhepHif9ErCPUY3+vxoiIaNQEIl+zkkNLGrpi7pSC3ssTR40K qB9MwQwQFUJUrxGxBIyJM1x8unZ+p9u8bljhdRjUnoK9k7/5zwBDr8/bwrc33xND 2JNILnMNi8yxWOYdFWV2pyhNkInu56bwagTJpqEevzcH0ciJ9UHkZQixI7Vq7Lo8 DetFt8Tq7LZIHlg2PhphO9qoVZ062nM2FqCtRRIj6/6DtgR22GgX+aAiG3M5PxJO TRymmU/rYXwa1mAXXZ4WsHszYwaoFkr0V5ILWQZoJ0+X5YvRoqjBI4rhZyWXPqVD n4l/loyKhkUCAwEAAaOCAncwggJzMA4GA1UdDwEB/wQEAwIFoDAdBgNVHSUEFjAU BggrBgEFBQcDAQYIKwYBBQUHAwIwDAYDVR0TAQH/BAIwADAdBgNVHQ4EFgQUoTnL IKmCT/Q8BLYQnPhLBNr1d9IwHwYDVR0jBBgwFoAUqEpqYwR93brm0Tm3pkVl7/Oo 7KEwbwYIKwYBBQUHAQEEYzBhMC4GCCsGAQUFBzABhiJodHRwOi8vb2NzcC5pbnQt eDMubGV0c2VuY3J5cHQub3JnMC8GCCsGAQUFBzAChiNodHRwOi8vY2VydC5pbnQt eDMubGV0c2VuY3J5cHQub3JnLzAtBgNVHREEJjAkghJ3d3cueXVzaGlrYWkuY28u dWuCDnl1c2hpa2FpLmNvLnVrMEwGA1UdIARFMEMwCAYGZ4EMAQIBMDcGCysGAQQB gt8TAQEBMCgwJgYIKwYBBQUHAgEWGmh0dHA6Ly9jcHMubGV0c2VuY3J5cHQub3Jn MIIBBAYKKwYBBAHWeQIEAgSB9QSB8gDwAHYA4mlLribo6UAJ6IYbtjuD1D7n/nSI +6SPKJMBnd3x2/4AAAFrutiYEAAABAMARzBFAiEAh0iDQCDbLkLfgkz/Ib+3NcSi PLZuc6LXn6HtqG4HfwICIBbNXtonKEw3Q+cMgnj9l6/TDSvJPTFxQ1yuoT4ys9WC AHYAY/Lbzeg7zCzPC3KEJ1drM6SNYXePvXWmOLHHaFRL2I0AAAFrutiYNAAABAMA RzBFAiA+PPXHcnEima2W4e1XF74r/SvZhzMalKQJVPJa/uQwMgIhANbASyaavxkA 82HM64/zJLqJaYz2FYQLUX736GjQXbdiMA0GCSqGSIb3DQEBCwUAA4IBAQBvKC9g QIHrq6xDk7y1mumnfvtlvG6DKktJoDJoK204AjfASH+sjT4QEETlFmq1xlQ3QqH5 cUfYG44wQFU1qQgVoxTTQu6ki7NaRnUP51Qe5GwwjEQoNhnRqoAdIhATPXDpL4Sy YalZAqWyRP05NZIj1t//WVJq3LSjTAAOFBWqyClZKhhUUPsjQV7ZScUSdBEK9DcM 7Cx8mck8lpxQJYBLohuFvJvhjsI43bf1n9iriNSxo28ZAEUb6Pd17ensjrYzjbGx Iec69E+MEnZ5/OPJyN9O4mYNdJMMi+tCQo0CiQkGcN6Tvpxin+53DI/IEoLN8VzU mC6SAC1qGiJI9z9S -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEA4R5rVkoy2A3BHk17eP78 9VQUQFuK9jwlpbKXZ8dMlXz3EmruSYkNEgDzRd9AdLoGm/0iW2pURE9C4h+2cmV4 vrqmCopw55hNelyFei8NYbnffflHMQ1Um2L7YBqNyDgLWMxwnjJ/4J/GPS/SFvHK kafZlpimmDpzyHioqHzwn39W9pd2yckON1RhwmSbVTkoBz9N1UWNQXdpimPlGtRC 5dViCMYsnJ4SMLoR1G+t7gKZuDvCirdBKmed/ThSvDgZEDa5tmXcjLltss3rPpqk mIxTgiaPABlmMAlBiKr+/MUgyfFl/3M1/qPVDSlljT2UwrQFXjBfnnGjGWvzTRb7 I32m1JzZ7VWDo419lJ2It0xC/UrdhepHif9ErCPUY3+vxoiIaNQEIl+zkkNLGrpi 7pSC3ssTR40KqB9MwQwQFUJUrxGxBIyJM1x8unZ+p9u8bljhdRjUnoK9k7/5zwBD r8/bwrc33xND2JNILnMNi8yxWOYdFWV2pyhNkInu56bwagTJpqEevzcH0ciJ9UHk ZQixI7Vq7Lo8DetFt8Tq7LZIHlg2PhphO9qoVZ062nM2FqCtRRIj6/6DtgR22GgX +aAiG3M5PxJOTRymmU/rYXwa1mAXXZ4WsHszYwaoFkr0V5ILWQZoJ0+X5YvRoqjB I4rhZyWXPqVDn4l/loyKhkUCAwEAAQ== -----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 304163897762699918174732804879807322252089 . . . . . . . . [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 2019-07-04 01:38:05 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-10-02 01:38:05 +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 918404680372308066050075257261644327759494798863207176588721560900050899164249557387182666440039843375665324858245899374720652994418616810579846730874700668628147646463671257132210817144680919548525577832980457312259200147129476293235982612808289225239993081421131500700585148760558210535285185736368662971871215681011035735150412799087844998362069725316617033695290506194171826006407252920101929772194122220713588670458615556752712876775819646908924321211234572772254818860930276869827504358126506505509676174703420000672271803417637276521656781392148288267707001945325899262516873353562670686850388436034125244545287332290354522978995281775985894219564904137312927617497519628923093949028255885058966087137332052368493403030842438018037470712485103315390035521244622347795486116019594171027219273737922861041422476078901004172674794987249489935196382217810028013337738629307312936835888821193041500380553183129008487408564706780994776737270663363853737915296736429538908964013757882990817863529785001491375808247241302971431344780853846882539038842958417664298931954742825243013549522437823961169154837964769319017271962875447052219217073299267080968600067842630552285176035207479063428610044916940880957204938538594537580211635781 . . . . . . . . . . . . . . . . . . . . [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) a139cb20a9824ff43c04b6109cf84b04daf577d2 . . . . . . . . . . . . . . . . [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) 00f0007600e2694bae26e8e94009e8861bb63b83d43ee7fe7488fba48f2893019dddf1dbfe0000016bbad8981000000403004730450221008748834020db2e42df824cff21bfb735c4a23cb66e73a2d79fa1eda86e077f02022016cd5eda27284c3743e70c8278fd97afd30d2bc93d3171435caea13e32b3d58200760063f2dbcde83bcc2ccf0b728427576b33a48d61778fbd75a638b1c768544bd88d0000016bbad89834000004030047304502203e3cf5c772712299ad96e1ed5717be2bfd2bd987331a94a40954f25afee43032022100d6c04b269abf1900f361cceb8ff324ba89698cf615840b517ef7e868d05db762 . . . . [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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