yushikai.co.uk
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:65:d2:1b:9a:be:62:7b:73:26:1c:3e:ec:10:58:e8:d8:f7 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): 03:65:d2:1b:9a:be:62:7b:73:26:1c:3e:ec:10:58:e8:d8:f7Serial Number (int): 295984658064000446136009234639486638938359
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: 12:c7:60:dc:ef:cd:ea:e9:fe:4d:ca:8b:66:62:b1:bd:36:88:ca:74
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): ca:44:e3:93:ae:7c:cd:06:12:2d:54:21:77:77:5d:11:81:68:06:2a
Fingerprint (sha256): 4f:c9:96:48:cd:9c:ba:4d:da:2e:88:5c:e7:c4:d4:69:8f:4f:c2:dd:eb:68:88:bd:fd:2f:55:0d:50:3a:02:3b
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----- MIIGaDCCBVCgAwIBAgISA2XSG5q+YntzJhw+7BBY6Nj3MA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xOTA4MTQwMTM3NTNaFw0x OTExMTIwMTM3NTNaMBkxFzAVBgNVBAMTDnl1c2hpa2FpLmNvLnVrMIICIjANBgkq hkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAwAdxMD7vohvUUDz2jXj0UMdlfq9DaOLe ClURF7BKDEKlKsurtifuY2hG84mrqIuq9GANFejoyVsrvNtYbsavOjzmWPdDj21e qfGQ71xm1PeB3Sus8DGWqPkAd2vYmhHVujq8XUYQMHAxluXvaJYbUkpzfAM07XLV iOaO4jnBXywSug7sHvEUlSpyuptpXCO3oyvYEhpbFZyk5AGqcF2tgD83nWGeGHY0 gGvpDLv7UweZfUab8tB6P3+DH5m1p1C1KI97JxoOcz1xJnPzo9dQ8RwpjLugckm8 VGiaToqBizI4kd5lIdmpMor/avqMTNDPEf/VJKLOA2vLU63q8Ry6EGs0p8KLpLE2 ezZAPvisdmucp8bUfURpvxHzQJKMk31JMV9QyblXU+Uj1MX6fRuYJQZwMAVWMuWd ORqFLhclixDFpIJEL3w9PMDOFRY9E5Hw+Ripjmr4C1+6k1ObFW46BfX9LY/fpdwG ItRa3vfSZe+lfq0OrqskIvQ9HaQ3dho/5FIr9709cV1RHI1zV9gd5mv+Ue0v6qnl 7lmOctgHKFSBnPGSEVDtZGg0v0mDvKfH7/lsxounqWFJHS6l662lz78g6P2JnO60 57gEg0BNheuqSa4pu+CZaiYCoyP4TLWYMLMzCJIko53PyxGsTs6G+ABlTNRvlaSK xQvFSxoebX0CAwEAAaOCAncwggJzMA4GA1UdDwEB/wQEAwIFoDAdBgNVHSUEFjAU BggrBgEFBQcDAQYIKwYBBQUHAwIwDAYDVR0TAQH/BAIwADAdBgNVHQ4EFgQUEsdg 3O/N6un+TcqLZmKxvTaIynQwHwYDVR0jBBgwFoAUqEpqYwR93brm0Tm3pkVl7/Oo 7KEwbwYIKwYBBQUHAQEEYzBhMC4GCCsGAQUFBzABhiJodHRwOi8vb2NzcC5pbnQt eDMubGV0c2VuY3J5cHQub3JnMC8GCCsGAQUFBzAChiNodHRwOi8vY2VydC5pbnQt eDMubGV0c2VuY3J5cHQub3JnLzAtBgNVHREEJjAkghJ3d3cueXVzaGlrYWkuY28u dWuCDnl1c2hpa2FpLmNvLnVrMEwGA1UdIARFMEMwCAYGZ4EMAQIBMDcGCysGAQQB gt8TAQEBMCgwJgYIKwYBBQUHAgEWGmh0dHA6Ly9jcHMubGV0c2VuY3J5cHQub3Jn MIIBBAYKKwYBBAHWeQIEAgSB9QSB8gDwAHYAb1N2rDHwMRnYmQCkURX/dxUcEdkC wQApBo2yCJo32RMAAAFsjf0ocAAABAMARzBFAiAVt4CxP/iRBl+txGdYAo37pxuH G84m9Qv7g6LIqG7xKQIhAIXdJ6cfcC7XX+yy3+pWezxbXHrIvLjNFljz8TwTNYs+ AHYAY/Lbzeg7zCzPC3KEJ1drM6SNYXePvXWmOLHHaFRL2I0AAAFsjf0nZAAABAMA RzBFAiA/8bALqi7TNrH4RkqObjVSIl2MN/da1SnsghN74cgXfwIhAI9YVuggALXE pfrWErQpcXVhab3tsoYaMlnhZm2Kyuh5MA0GCSqGSIb3DQEBCwUAA4IBAQA3eDKx eayJ3IMpSMLv5zsvchDYxNxqUf/vucBa29mjDe4u0ojopCpbKg6VFBL68xERWFGA 4V5Ia4UR9VIrkPZn5YIuCccvqk/MGlk7vzUO4Y/gMe2VvJboeq7bIQc6xmjmN+ds 5tJitB5jc64nz3yPCHUgnNIUvSI36HCHNPPPr1QnMjELxGt24URfuwDccRd9ul/3 RLFmJxy8gfsmuOOgnNkTitSvWPojB2OMJGnkGdH1VntgWU3S+VnVC5ZKV2Wp6YV3 drZBDhQor6GIMNrN+ujLn8mMXSHcnRoNx3M5ZrCNP8ffdR82tWNbMACNaXQK6XsI w1T1Ejq/8o7s1d4L -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAwAdxMD7vohvUUDz2jXj0 UMdlfq9DaOLeClURF7BKDEKlKsurtifuY2hG84mrqIuq9GANFejoyVsrvNtYbsav OjzmWPdDj21eqfGQ71xm1PeB3Sus8DGWqPkAd2vYmhHVujq8XUYQMHAxluXvaJYb UkpzfAM07XLViOaO4jnBXywSug7sHvEUlSpyuptpXCO3oyvYEhpbFZyk5AGqcF2t gD83nWGeGHY0gGvpDLv7UweZfUab8tB6P3+DH5m1p1C1KI97JxoOcz1xJnPzo9dQ 8RwpjLugckm8VGiaToqBizI4kd5lIdmpMor/avqMTNDPEf/VJKLOA2vLU63q8Ry6 EGs0p8KLpLE2ezZAPvisdmucp8bUfURpvxHzQJKMk31JMV9QyblXU+Uj1MX6fRuY JQZwMAVWMuWdORqFLhclixDFpIJEL3w9PMDOFRY9E5Hw+Ripjmr4C1+6k1ObFW46 BfX9LY/fpdwGItRa3vfSZe+lfq0OrqskIvQ9HaQ3dho/5FIr9709cV1RHI1zV9gd 5mv+Ue0v6qnl7lmOctgHKFSBnPGSEVDtZGg0v0mDvKfH7/lsxounqWFJHS6l662l z78g6P2JnO6057gEg0BNheuqSa4pu+CZaiYCoyP4TLWYMLMzCJIko53PyxGsTs6G +ABlTNRvlaSKxQvFSxoebX0CAwEAAQ== -----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 295984658064000446136009234639486638938359 . . . . . . . . [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 2019-08-14 01:37:53 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-11-12 01:37:53 +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 783410259857481540688269372257564149227908616062238276040879464194630813453164649637993283420491291276568768215069084985535004052762090518957003346093716339326725775769975883922594798122459554606844100212927416250925303042742466677339067060431252892033846922890365522330295257965158644207254539041798046173011755507042248171782446891402926905689874401983902834708525653324912536964035285375730305631097940508262733400363896755611504338460848256480353844639350130112571239447197171323583174505661268876249778274162969087751320011423437944614302518881272092018413248476972757394831364915271100703273145905372710411887474605531214170943312622668434697698642118874490853198180401744148728508958456640121018760618259820471150589395808770524872766261458982524290072352657655028553506367499610049098744360862236069107289009514092749817659594610634623460128100630192872904211379169849494585564095672915352024254998586640408865029447640344037572592369440777696697531033153390951632282825565736308324807459231511829353883694159112852092249603900066170008519364638887130050018934104729051549752151475919385688570725709746167024996539356438555903941846265145899549547431978358129242894248027484541102200191051829523949284195537090486160563531133 . . . . . . . . . . . . . . . . . . . . [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) 12c760dcefcdeae9fe4dca8b6662b1bd3688ca74 . . . . . . . . . . . . . . . . [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) 00f00076006f5376ac31f03119d89900a45115ff77151c11d902c10029068db2089a37d9130000016c8dfd28700000040300473045022015b780b13ff891065fadc46758028dfba71b871bce26f50bfb83a2c8a86ef12902210085dd27a71f702ed75fecb2dfea567b3c5b5c7ac8bcb8cd1658f3f13c13358b3e00760063f2dbcde83bcc2ccf0b728427576b33a48d61778fbd75a638b1c768544bd88d0000016c8dfd2764000004030047304502203ff1b00baa2ed336b1f8464a8e6e3552225d8c37f75ad529ec82137be1c8177f0221008f5856e82000b5c4a5fad612b42971756169bdedb2861a3259e1666d8acae879 . . . . [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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