yushikai.co.uk
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:c4:34:bb:42:a3:30:d8:82:d9:87:dc:ec:2b:d1:d7:91:32 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:c4:34:bb:42:a3:30:d8:82:d9:87:dc:ec:2b:d1:d7:91:32Serial Number (int): 328102293878646381774054827262051268137266
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: 4b:5f:07:05:fa:43:5c:1b:85:56:92:45:a2:ba:f0:e0:23:6f:40:d8
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): e7:00:df:e1:ad:5e:99:52:cf:a8:9b:8f:10:3c:0e:b3:d0:50:51:35
Fingerprint (sha256): 24:a0:e0:5e:ee:c3:70:7e:97:d1:14:c3:25:37:81:5b:c7:88:9e:02:2a:ea:5a:d4:9c:58:a0:18:88:16:24:06
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----- MIIGajCCBVKgAwIBAgISA8Q0u0KjMNiC2Yfc7CvR15EyMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xODExMjEwMjQ0MDZaFw0x OTAyMTkwMjQ0MDZaMBkxFzAVBgNVBAMTDnl1c2hpa2FpLmNvLnVrMIICIjANBgkq hkiG9w0BAQEFAAOCAg8AMIICCgKCAgEArGiqUi5bPiQQ4kr43l0C6sMBGEL1I4JH 4oqoMzCfYfELAp0p1IHTwPgwl/TPYYURrJPpMNf2xv/e+sYHwpxC00bx7S03xXc8 Zwk7q3qLZN4CYPuYUd/fx9AaMZNqfe5JRPUFWBAUfNKcw/vBKWF+NY4greG8UHZP fa2Ptj03+ZTK4z3sLfttqyg/CYwNCLJNRoWRAx87r1DUI7PG116cvpdFJNTDrYJr HM0z87jbNLiOltN6UMwahTiLofdJHfwqznvoGusiQoNnl6XgOoObQmIvmPqqFvOy 50perc/qgXenUvcBqKARwDYRarCALQHiBj01EK5gb8hmJvgJrCz4O1BujogAKaAo Gxh6PQlnVB9znbvo+/7nOnfYJhRorgQusgAUJNMxrtlCjQ8mdiAJGiml0NZCk6os KqX8Wn+DJ6U5kWhrv3S/B+4+b+QaRSjTHt906AEAOi8fkgSga+qkfoT7WozK2VFq H1i/X0enD+Xqc7ZSP+231wrGVB53Y+G8C0vdQD+T2HKtGGf7jJl+f4oJ1l1cYvQy ZTzlX2CCHS5eEMwMrsEs6asEyWDNd7cLRmzf2zKffh55OevYb5/HOTvDGa8deL+R A+NHG7qDDyC7CzTaiHdWJhnnfpKjWXmZ+re/uhxF8QhG51gSD9K5nNTxLbm0mnMT WKeHDhrHmOsCAwEAAaOCAnkwggJ1MA4GA1UdDwEB/wQEAwIFoDAdBgNVHSUEFjAU BggrBgEFBQcDAQYIKwYBBQUHAwIwDAYDVR0TAQH/BAIwADAdBgNVHQ4EFgQUS18H BfpDXBuFVpJForrw4CNvQNgwHwYDVR0jBBgwFoAUqEpqYwR93brm0Tm3pkVl7/Oo 7KEwbwYIKwYBBQUHAQEEYzBhMC4GCCsGAQUFBzABhiJodHRwOi8vb2NzcC5pbnQt eDMubGV0c2VuY3J5cHQub3JnMC8GCCsGAQUFBzAChiNodHRwOi8vY2VydC5pbnQt eDMubGV0c2VuY3J5cHQub3JnLzAtBgNVHREEJjAkghJ3d3cueXVzaGlrYWkuY28u dWuCDnl1c2hpa2FpLmNvLnVrMEwGA1UdIARFMEMwCAYGZ4EMAQIBMDcGCysGAQQB gt8TAQEBMCgwJgYIKwYBBQUHAgEWGmh0dHA6Ly9jcHMubGV0c2VuY3J5cHQub3Jn MIIBBgYKKwYBBAHWeQIEAgSB9wSB9ADyAHcAdH7agzGtMxCRIZzOJU9CcMK//V5C IAjGNzV55hB7zFYAAAFnNF4r7gAABAMASDBGAiEAlKAHqyycH5Ge9UM7WV+LXtBe zGXRuKEiTrc/pRbC2gsCIQDXxn33lpMjg2X/TQFrQ96+cCGedaE0n/MOl7fFPE1z DAB3ACk8UZZUyDlluqpQ/FgH1Ldvv1h6KXLcpMMM9OVFR/R4AAABZzReLDgAAAQD AEgwRgIhAOflA6gCG6FFC6UD8t4o4h27WT2URgcfq7Ew3axKKjkTAiEAx0yMVTEF 6E+NeHhDcZWrfw44oU+1NveRu4j+6DpxmFMwDQYJKoZIhvcNAQELBQADggEBAISq Oa9WZzXZJ+MALL0zqJCwyXcLwigV5zpEn9jBob34zn/gf6BQFIgIvMOOjUQ0uMgp +fnl52/tfJN9LQEyPOh3G0Tq5XQcLXo1NSI3voWl5li/E15sGIWbMnhJkxT0Q2YB xbOIKRo7MvpNVqMOkbAnCMM9SOJNtOZ+lWC8lniUfuXh6XStp7YmpV3G+wBSx8k6 +kUUb5pYw/BYonflbVAT/RRgXA2oMMmBMXmNcxkNR75AOTSkT0un/+flGSaiVIzz sP7knKDXffoU5xOttkr0kJb6AKLHfNubJ5p55vcbBrY/WGY+Xn+qYZnxgeMO/F8F oFgzU9u2To24VTTQrbI= -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEArGiqUi5bPiQQ4kr43l0C 6sMBGEL1I4JH4oqoMzCfYfELAp0p1IHTwPgwl/TPYYURrJPpMNf2xv/e+sYHwpxC 00bx7S03xXc8Zwk7q3qLZN4CYPuYUd/fx9AaMZNqfe5JRPUFWBAUfNKcw/vBKWF+ NY4greG8UHZPfa2Ptj03+ZTK4z3sLfttqyg/CYwNCLJNRoWRAx87r1DUI7PG116c vpdFJNTDrYJrHM0z87jbNLiOltN6UMwahTiLofdJHfwqznvoGusiQoNnl6XgOoOb QmIvmPqqFvOy50perc/qgXenUvcBqKARwDYRarCALQHiBj01EK5gb8hmJvgJrCz4 O1BujogAKaAoGxh6PQlnVB9znbvo+/7nOnfYJhRorgQusgAUJNMxrtlCjQ8mdiAJ Giml0NZCk6osKqX8Wn+DJ6U5kWhrv3S/B+4+b+QaRSjTHt906AEAOi8fkgSga+qk foT7WozK2VFqH1i/X0enD+Xqc7ZSP+231wrGVB53Y+G8C0vdQD+T2HKtGGf7jJl+ f4oJ1l1cYvQyZTzlX2CCHS5eEMwMrsEs6asEyWDNd7cLRmzf2zKffh55OevYb5/H OTvDGa8deL+RA+NHG7qDDyC7CzTaiHdWJhnnfpKjWXmZ+re/uhxF8QhG51gSD9K5 nNTxLbm0mnMTWKeHDhrHmOsCAwEAAQ== -----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 328102293878646381774054827262051268137266 . . . . . . . . [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 2018-11-21 02:44:06 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-02-19 02:44:06 +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 703366737658525997972790657791031285806795799088255963650638478842318966179006216524604412122306791206231549547602653747913892633451951901052406843893786187030680641398280568146344108840427816776057629913235060553159146769327045353245899414933577131900142743570489335591696941206284220215056894564409467339974939942370176524160395925120072702313404430852222955978193900934964712005219492100615727073568432932517692935353316643961150515190670407359247243806679977887427648213853330627896835071728518900094392798201250314021546584798564812338195608262235118717615712526908648542979709717618723706328132808837053377667363312057957183513018821606612681795178286549872482119179304118701396113433912568994953787618310878416879123642879759452891546766005606139851281990133215487612839737424204739089634020455326572294950902713302995592465699116897080180103766284184348015074933191009290113518049459529578528492810022840749608041648307720261338170430504619549390363212780146852138561442134978243085964700840824503892044570176076242763387607040759813496264384379260509242029871634054331025108653337892375546251677634393667955924588817077598577535549740458656780581767637319405371837920448392766865930243318507985726502044935589557797978085611 . . . . . . . . . . . . . . . . . . . . [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) 4b5f0705fa435c1b85569245a2baf0e0236f40d8 . . . . . . . . . . . . . . . . [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 (247 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (244 bytes) 00f2007700747eda8331ad331091219cce254f4270c2bffd5e422008c6373579e6107bcc5600000167345e2bee000004030048304602210094a007ab2c9c1f919ef5433b595f8b5ed05ecc65d1b8a1224eb73fa516c2da0b022100d7c67df79693238365ff4d016b43debe70219e75a1349ff30e97b7c53c4d730c007700293c519654c83965baaa50fc5807d4b76fbf587a2972dca4c30cf4e54547f47800000167345e2c380000040300483046022100e7e503a8021ba1450ba503f2de28e21dbb593d9446071fabb130ddac4a2a3913022100c74c8c553105e84f8d7878437195ab7f0e38a14fb536f791bb88fee83a719853 . . . . [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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