yushikai.co.uk
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 04:b5:3e:02:02:9d:7d:1b:ad:30:2f:73:72:0f:db:17:38:95 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): 04:b5:3e:02:02:9d:7d:1b:ad:30:2f:73:72:0f:db:17:38:95Serial Number (int): 410122674713105590134267599086611162675349
Serial Number lenght: 139 bits, 18 octets
SubjectKeyId: 19:7a:f2:0f:6b:2a:e7:9b:dc:49:46:93:60:83:52:2f:fa:a9:d9:24
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): 50:31:13:52:41:01:36:a6:8a:fa:5b:60:4d:59:81:ca:6e:22:d0:ab
Fingerprint (sha256): 3a:01:33:43:d0:c5:df:d1:09:63:2f:b0:39:46:cb:1b:99:d3:8f:d2:f8:dc:40:08:c8:8d:e1:b5:c1:21:fc:1a
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----- MIIGajCCBVKgAwIBAgISBLU+AgKdfRutMC9zcg/bFziVMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xOTAxMTYwMjUyMjBaFw0x OTA0MTYwMjUyMjBaMBkxFzAVBgNVBAMTDnl1c2hpa2FpLmNvLnVrMIICIjANBgkq hkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAuY7QNIEYbOJhfz/GgJ63vSrxhGVtwXvu MXZXfOWGnnJtDK2gIRvZuTeIXD1r2/ktAKntsqh5MKPVpuwvo+Cy432hOfVcHd0j aD01+/vpitOx/LNcZBLYIs2AYRlAifOhE8Y2yAY3BeJgFazO45xqm+E2zYsnKNTx 64LFHEXPvDVeXzYsW/rQTQAwj6U46WkASsIO+AbUg1UFiXamH/UXz5kqAyCs0Nol rVN9hhJO3tDp7DAo92IEuV9UO+FYP8nkC9rSmhwvGy8by1OF7cGlnTVH82mS3K2R QxaWy1pfewlhyttZWtusOaLzZWMk+7Cjshxy/0ySSkMJwsOqO9hL4ZZpWC6+SqRS //nblj0wW8ub/BTTV3SAOCmGd6m2mAL4UjI8SMw68+FFfW/j0SLc+JT5MKbvzcxt oWmfGGf4SuebM5Cx3DBA4GusgCKgQzX/RoJ29n7PHODaAXsBDsUWYe+gKOBnDlFc 6I1+G+YbJRxAoIawNlI+PB9gcXJKG1kVkdjD0gB6rqZThIW1s1SBy2NPuw7Zrigq QXoAawTRvuujnKm6WgvMexFoQu3pC+vh6wWixvj9Shf9/Y49Z+6zNxgojaFi+Vui lM+Hq1HdNibaiyz9z51+qebkUvuSZST8H+t9KLo6to/7DlwRtK8gWhgST/hAhg1j 0CORbbGvJPcCAwEAAaOCAnkwggJ1MA4GA1UdDwEB/wQEAwIFoDAdBgNVHSUEFjAU BggrBgEFBQcDAQYIKwYBBQUHAwIwDAYDVR0TAQH/BAIwADAdBgNVHQ4EFgQUGXry D2sq55vcSUaTYINSL/qp2SQwHwYDVR0jBBgwFoAUqEpqYwR93brm0Tm3pkVl7/Oo 7KEwbwYIKwYBBQUHAQEEYzBhMC4GCCsGAQUFBzABhiJodHRwOi8vb2NzcC5pbnQt eDMubGV0c2VuY3J5cHQub3JnMC8GCCsGAQUFBzAChiNodHRwOi8vY2VydC5pbnQt eDMubGV0c2VuY3J5cHQub3JnLzAtBgNVHREEJjAkghJ3d3cueXVzaGlrYWkuY28u dWuCDnl1c2hpa2FpLmNvLnVrMEwGA1UdIARFMEMwCAYGZ4EMAQIBMDcGCysGAQQB gt8TAQEBMCgwJgYIKwYBBQUHAgEWGmh0dHA6Ly9jcHMubGV0c2VuY3J5cHQub3Jn MIIBBgYKKwYBBAHWeQIEAgSB9wSB9ADyAHcAdH7agzGtMxCRIZzOJU9CcMK//V5C IAjGNzV55hB7zFYAAAFoVMnYSgAABAMASDBGAiEA8KaDng83o6YDI+H7K9UIDXxM 3zQckoFGUPVqTDrtwrECIQD1SniZ/HdZquzMTxwKm7P0Yb5tcjWOvHNiSI1xTlGb EwB3AGPy283oO8wszwtyhCdXazOkjWF3j711pjixx2hUS9iNAAABaFTJ2lAAAAQD AEgwRgIhAP36z7vpdw3vI/QwlP6dy08wJKOZ5mf52Zvb3xfsy8l3AiEA1o7hAAfQ D0P4Mk2vODcdWIGNH3GDhdpn0yDK76XmFGowDQYJKoZIhvcNAQELBQADggEBADfo iigsC9TgTaqPtxQlbAHdzRntHmkQRBh3dp4chvF7C68cplLg1up3/ed94NoASj5T 5bA1SrONEGSebHrM+6bPS9SDoeJjv3ObRLWnk+9t4PZWetpz3rGm2J0TBiPsJfLY zqOGOnxqwMzn1CALiSDhGZ6ypVfCv1LJ9Ue4Exnb4mTWesFrty6cjmO4Ro/k01TU f/73+hjAiUVuzxQgwHthxKJYLnsx00oSciPKpa2MTgYX68nfU4oj89vMytkTXVA7 hLDysy3poZPm0NBRL4x4CubyikF6Z/iZDy5yx7z4u8SXUV2XokIigl17XCc7E/Qz Cgcu96rnYwcit0vwi1c= -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAuY7QNIEYbOJhfz/GgJ63 vSrxhGVtwXvuMXZXfOWGnnJtDK2gIRvZuTeIXD1r2/ktAKntsqh5MKPVpuwvo+Cy 432hOfVcHd0jaD01+/vpitOx/LNcZBLYIs2AYRlAifOhE8Y2yAY3BeJgFazO45xq m+E2zYsnKNTx64LFHEXPvDVeXzYsW/rQTQAwj6U46WkASsIO+AbUg1UFiXamH/UX z5kqAyCs0NolrVN9hhJO3tDp7DAo92IEuV9UO+FYP8nkC9rSmhwvGy8by1OF7cGl nTVH82mS3K2RQxaWy1pfewlhyttZWtusOaLzZWMk+7Cjshxy/0ySSkMJwsOqO9hL 4ZZpWC6+SqRS//nblj0wW8ub/BTTV3SAOCmGd6m2mAL4UjI8SMw68+FFfW/j0SLc +JT5MKbvzcxtoWmfGGf4SuebM5Cx3DBA4GusgCKgQzX/RoJ29n7PHODaAXsBDsUW Ye+gKOBnDlFc6I1+G+YbJRxAoIawNlI+PB9gcXJKG1kVkdjD0gB6rqZThIW1s1SB y2NPuw7ZrigqQXoAawTRvuujnKm6WgvMexFoQu3pC+vh6wWixvj9Shf9/Y49Z+6z NxgojaFi+VuilM+Hq1HdNibaiyz9z51+qebkUvuSZST8H+t9KLo6to/7DlwRtK8g WhgST/hAhg1j0CORbbGvJPcCAwEAAQ== -----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 410122674713105590134267599086611162675349 . . . . . . . . [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 2019-01-16 02:52:20 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-04-16 02:52:20 +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 757010041009028084223488255565029975755882774051702913372581283897038527751752176937151793474314319454705180405034568154857606571708608666383286216406414208965625943143210429462647854211485868449407639288559329262630938978839465951597794358387177948801768622281806404245700353675616111373598174611958032826661356244046053954221778097402679657047880908315785901670078565014783144361843140106471031631525598629184792866851332624229677601067307840286639157571171343936604357030648120158734947407644867691955854161487048523468507178486143487525732165394482194483958269947592896637245423790529256764078839822768104796591891660310134614874276409607892018344502226069922921978986273251630921445865227032380894739717684812811971055984350371215323142674619751439948199252129078225664181630753227237946607727635596559501858069917584669594689981155984366435790772190819302600684515933355596077098972201163672852466420496985024571077401113528708296010807506572287351556777186982147567691501807047557447037528075667097170456046484718902728065786424358010460937653668854447734327566374011188685154914490900181918936736797473689143031415706128897283475937696970018786097030038027993925599525980094620611001147874437257962300346616941898831884133623 . . . . . . . . . . . . . . . . . . . . [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) 197af20f6b2ae79bdc4946936083522ffaa9d924 . . . . . . . . . . . . . . . . [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) 00f2007700747eda8331ad331091219cce254f4270c2bffd5e422008c6373579e6107bcc560000016854c9d84a0000040300483046022100f0a6839e0f37a3a60323e1fb2bd5080d7c4cdf341c92814650f56a4c3aedc2b1022100f54a7899fc7759aaeccc4f1c0a9bb3f461be6d72358ebc7362488d714e519b1300770063f2dbcde83bcc2ccf0b728427576b33a48d61778fbd75a638b1c768544bd88d0000016854c9da500000040300483046022100fdfacfbbe9770def23f43094fe9dcb4f3024a399e667f9d99bdbdf17eccbc977022100d68ee10007d00f43f8324daf38371d58818d1f718385da67d320caefa5e6146a . . . . [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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