yushikai.co.uk
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:28:91:25:c6:6c:21:f0:8f:bd:78:4e:1a:f6:2f:17:bf:25 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): 03:28:91:25:c6:6c:21:f0:8f:bd:78:4e:1a:f6:2f:17:bf:25Serial Number (int): 275141086670975103969485605333169654447909
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: 00:97:39:ff:7a:f1:81:ca:af:eb:29:64:c2:58:a9:49:39:e8:9b:0d
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): 65:87:96:95:b5:79:14:83:bc:29:35:b8:47:59:de:f3:8d:2d:64:08
Fingerprint (sha256): 03:a1:0b:1d:65:cf:86:af:c2:a1:12:c3:24:8b:f2:ea:61:12:c5:70:a5:f5:ac:cc:7b:8d:c7:dd:e0:47:e5:1c
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----- MIIGaTCCBVGgAwIBAgISAyiRJcZsIfCPvXhOGvYvF78lMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xOTA4MjEwMTM3MDJaFw0x OTExMTkwMTM3MDJaMBkxFzAVBgNVBAMTDnl1c2hpa2FpLmNvLnVrMIICIjANBgkq hkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAy50HeEpVobBsi1jTePD2HwxlDQcNo92P vRaBPboKICVgIk38r0NcRGrOVtivdpgO8OFZCr46Qjee7NCNwyF5Yl8JZAG2n9uq XhMJ4ebMzZJ9JlK+tCGnwvPDtEmKhHJgQlvboFC41qWZl4c6TKNJTBfcagZ+h9Ri MkkCnJeuOmJmFdzbQ5ynWp6APb78aHLpNs0tj9dW10kmukXHgE353Wl8bBtc2UB4 NkgQxlY7H9cZfjr24piJenIte8HLfDOTSc8RLD6+78LMoJviy/ZIYZrwoZmDrFvh xxvN0lXjRPSmkeCcIEEYAr6TqMMX9xSYJvC19/V/w4lpB7MERJ2RnIFLm0aUKl97 sy8Qq14+dGWoUKMJefMz2voFu9lMk2MX/m6Je4JfMCfMTGzyjWh/kBrdtXaraRzh R87UUTXWLX+1Crk9kZoErP8Rlcho10PlpFPGahs3UnGWCtSp2oYfQwMGFW/wY0OU Uz2McZJJPI7h8hwD1UWINmlbkBUZlBPwJGzLiaK3OL6hwcDCFWeiF5d3/oRqW5tG A1HT28XTYzwrwomwdnEaZByyGHyMcxYM3zFhKPx4+IFLTqOCEYAWMcU6SfTn9R6d E5+QeTJC/FXdZiEbEF4gqMX9ZH90R9LxnS7E5uvcCB4LF6PkoHg39eCQsBNXOldL pIvUMQIBHp0CAwEAAaOCAngwggJ0MA4GA1UdDwEB/wQEAwIFoDAdBgNVHSUEFjAU BggrBgEFBQcDAQYIKwYBBQUHAwIwDAYDVR0TAQH/BAIwADAdBgNVHQ4EFgQUAJc5 /3rxgcqv6ylkwlipSTnomw0wHwYDVR0jBBgwFoAUqEpqYwR93brm0Tm3pkVl7/Oo 7KEwbwYIKwYBBQUHAQEEYzBhMC4GCCsGAQUFBzABhiJodHRwOi8vb2NzcC5pbnQt eDMubGV0c2VuY3J5cHQub3JnMC8GCCsGAQUFBzAChiNodHRwOi8vY2VydC5pbnQt eDMubGV0c2VuY3J5cHQub3JnLzAtBgNVHREEJjAkghJ3d3cueXVzaGlrYWkuY28u dWuCDnl1c2hpa2FpLmNvLnVrMEwGA1UdIARFMEMwCAYGZ4EMAQIBMDcGCysGAQQB gt8TAQEBMCgwJgYIKwYBBQUHAgEWGmh0dHA6Ly9jcHMubGV0c2VuY3J5cHQub3Jn MIIBBQYKKwYBBAHWeQIEAgSB9gSB8wDxAHYAY/Lbzeg7zCzPC3KEJ1drM6SNYXeP vXWmOLHHaFRL2I0AAAFssgjixgAABAMARzBFAiAdZetjarA6Rq6IytMRuJANLQhZ ebTLTReYIupjHEKt4QIhALIfsjl/k5KvWTyXL1qjkZ00njva4xLoZW25JUNAYIDt AHcAdH7agzGtMxCRIZzOJU9CcMK//V5CIAjGNzV55hB7zFYAAAFssgjknAAABAMA SDBGAiEA+oAz6pKek8v1NkyJpOwXT9rWYm+7R/FHUOCWag8Z7qICIQD3/JndeNMi bPhJx0eCfxyMyyu+HbonUxXwQ34TZC1cdDANBgkqhkiG9w0BAQsFAAOCAQEAVRmM T5ZcRmk5+j/GF77Ag4mAAHZayo/modFsOBZSztNC0rQ84mveQMbsWVhoYZuAvLx4 cXf21SenK2R48SrR8w0esh5vZDmSy1ZUTus7agIhNA2MgjNdi1oOJE18J4C9Vfu2 JesqxPVF5WSh2ufE9aC6upXe0DArIJ61dPRyH20/SyvO9FBMwJg2BGaWsYzaS4zB 1mCOoCkLXWFm9D/pYoLinxmPG4iE2+ren70N5MzpAEipZDfqE8yeIRkG2OkLDi6F P+tQUIKEzbEXPMIPJ6v3HbyqgHS3myTjm30QAYz1bp6I1l6SeIrkbtlQZouevjCV r0abxsAwHGjcfqguag== -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAy50HeEpVobBsi1jTePD2 HwxlDQcNo92PvRaBPboKICVgIk38r0NcRGrOVtivdpgO8OFZCr46Qjee7NCNwyF5 Yl8JZAG2n9uqXhMJ4ebMzZJ9JlK+tCGnwvPDtEmKhHJgQlvboFC41qWZl4c6TKNJ TBfcagZ+h9RiMkkCnJeuOmJmFdzbQ5ynWp6APb78aHLpNs0tj9dW10kmukXHgE35 3Wl8bBtc2UB4NkgQxlY7H9cZfjr24piJenIte8HLfDOTSc8RLD6+78LMoJviy/ZI YZrwoZmDrFvhxxvN0lXjRPSmkeCcIEEYAr6TqMMX9xSYJvC19/V/w4lpB7MERJ2R nIFLm0aUKl97sy8Qq14+dGWoUKMJefMz2voFu9lMk2MX/m6Je4JfMCfMTGzyjWh/ kBrdtXaraRzhR87UUTXWLX+1Crk9kZoErP8Rlcho10PlpFPGahs3UnGWCtSp2oYf QwMGFW/wY0OUUz2McZJJPI7h8hwD1UWINmlbkBUZlBPwJGzLiaK3OL6hwcDCFWei F5d3/oRqW5tGA1HT28XTYzwrwomwdnEaZByyGHyMcxYM3zFhKPx4+IFLTqOCEYAW McU6SfTn9R6dE5+QeTJC/FXdZiEbEF4gqMX9ZH90R9LxnS7E5uvcCB4LF6PkoHg3 9eCQsBNXOldLpIvUMQIBHp0CAwEAAQ== -----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 275141086670975103969485605333169654447909 . . . . . . . . [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 2019-08-21 01:37:02 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-11-19 01:37:02 +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 830670180025170315555115993972569254430427274783492462420241270293556772887305096605493728294016540836355328094345359433080360023301605153885392058947800643627508944264014215340180878220223991098907724072458595366834680784809287496868639829793166618606735564458308424557302815788441490499530317613475403658159392770779024218304878871345404504496929847739719227105582377709329201732667668548836281320367093813907721316636957340582138153493337213748196876161961686889803077135930223663374179394480742296769565170540110049900071425311506402094627646354490246556298520943175246338874721298192463005615953025706820403879415425896245446661542625398015193355804095932307352005882696273207595772330143386508289206727126452765134890066285579187041009142163801947175130399504985240094720162765287816045673540746306943177388992230497181170134354068567397678981970013542765820842522271293405606014251897021499853330515365565167696368852389496654962915706553563892342592232610106046029474742456178209378788060520895954623543370923762494096297611477166558107589916807263293529304110339936736108405212190449808741869781772635630601398621992180759836074901737164363267377779416111036745556310731779563941309340134465726594042482661213128897612291741 . . . . . . . . . . . . . . . . . . . . [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) 009739ff7af181caafeb2964c258a94939e89b0d . . . . . . . . . . . . . . . . [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 (246 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (243 bytes) 00f100760063f2dbcde83bcc2ccf0b728427576b33a48d61778fbd75a638b1c768544bd88d0000016cb208e2c6000004030047304502201d65eb636ab03a46ae88cad311b8900d2d085979b4cb4d179822ea631c42ade1022100b21fb2397f9392af593c972f5aa3919d349e3bdae312e8656db92543406080ed007700747eda8331ad331091219cce254f4270c2bffd5e422008c6373579e6107bcc560000016cb208e49c0000040300483046022100fa8033ea929e93cbf5364c89a4ec174fdad6626fbb47f14750e0966a0f19eea2022100f7fc99dd78d3226cf849c747827f1c8ccb2bbe1dba275315f0437e13642d5c74 . . . . [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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