yushikai.co.uk
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:47:75:99:b4:04:93:e4:1b:c9:58:df:a4:56:f1:5d:61:a3 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): 03:47:75:99:b4:04:93:e4:1b:c9:58:df:a4:56:f1:5d:61:a3Serial Number (int): 285653223594789973201634644362862991860131
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: 63:28:03:00:cb:7c:eb:1f:4f:18:c1:a5:21:b3:b4:31:d3:dd:5f:8c
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): 44:e6:ba:ed:5b:18:1c:6a:1d:88:2c:3b:82:f4:0b:11:ef:aa:be:b0
Fingerprint (sha256): 42:a7:1d:cb:83:81:00:fa:35:d0:2f:05:7e:07:78:77:b1:01:ae:7c:84:db:8d:34:7d:2c:6c:bd:8d:72:7b:6c
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----- MIIGajCCBVKgAwIBAgISA0d1mbQEk+QbyVjfpFbxXWGjMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xOTA2MTgwMTM4MzFaFw0x OTA5MTYwMTM4MzFaMBkxFzAVBgNVBAMTDnl1c2hpa2FpLmNvLnVrMIICIjANBgkq hkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAvdR46ekkmbwbTqTPj0MEsjnZZitR1SyM 4LeZkDZAQ/kvRtDXoAhi7t7Bjw8/EqOIhDVrHBIiUChvXI0lWaChnR5w5kZbMcxQ 8pWWnZ10voRZLCFdD+yYs2yJ9h2MJCmH5rmPtL4jtAyLhZjCITyahJeEKS+fapAY fZkTYsozdKXJYdXA+m7royR4XbiozDTG35jfPbByBp6aea/Jir5FhiYSwWh6J2kj xBIYPDF5MCgf2Tp9ZQP59qAexukCdQKIeEaBdCY434FGd1w20UxPtI8TnULFI6W5 2dZBiIH6vES1dxEzSoOVn7RctvA3eZi/tIB+/+L8s45J3XKfeIxf+UUuIRg6XDp7 xcJgBOVLataq9tlKknQwLphUho62VF6Sxjqel+ThX1CEliavMFS5efrKMabab8a4 Yo9BXq1wS+v6zGRHPKUbD3b9X9MG9JgTDaBITtL/0AH8xk8bZXiFUwj4W6HZ1OHW Uwy1uYNYiXps4tdtGzEkgRY3SDSqcMuIEx6DNEBRveCGdL/SPHHCXdh1b/aJmmeD ty9jAs4e4QptUnhic0McXohRDdUFpVRV3ew70pXmqgsOJnxcQYgezbO1SvIVZaLE BHBYOhEljpCaUFYV/b0aczFlk2vve9ZKo2wScQINSfVzr+cDIPXGp2U1aaQ4hyoL R1L+1qjOiOUCAwEAAaOCAnkwggJ1MA4GA1UdDwEB/wQEAwIFoDAdBgNVHSUEFjAU BggrBgEFBQcDAQYIKwYBBQUHAwIwDAYDVR0TAQH/BAIwADAdBgNVHQ4EFgQUYygD AMt86x9PGMGlIbO0MdPdX4wwHwYDVR0jBBgwFoAUqEpqYwR93brm0Tm3pkVl7/Oo 7KEwbwYIKwYBBQUHAQEEYzBhMC4GCCsGAQUFBzABhiJodHRwOi8vb2NzcC5pbnQt eDMubGV0c2VuY3J5cHQub3JnMC8GCCsGAQUFBzAChiNodHRwOi8vY2VydC5pbnQt eDMubGV0c2VuY3J5cHQub3JnLzAtBgNVHREEJjAkghJ3d3cueXVzaGlrYWkuY28u dWuCDnl1c2hpa2FpLmNvLnVrMEwGA1UdIARFMEMwCAYGZ4EMAQIBMDcGCysGAQQB gt8TAQEBMCgwJgYIKwYBBQUHAgEWGmh0dHA6Ly9jcHMubGV0c2VuY3J5cHQub3Jn MIIBBgYKKwYBBAHWeQIEAgSB9wSB9ADyAHcA4mlLribo6UAJ6IYbtjuD1D7n/nSI +6SPKJMBnd3x2/4AAAFraHM+jwAABAMASDBGAiEAz0/9qkccb+5QxOBYgAE69+n8 7vnbLxN9tiGXPSB8XQICIQCS/t0hhSjvpt0eMM4DCRvI05b+svDoiLlUFeu/QEH0 rQB3ACk8UZZUyDlluqpQ/FgH1Ldvv1h6KXLcpMMM9OVFR/R4AAABa2hzPrEAAAQD AEgwRgIhAKsY6TFjiVEvYPtfX1umcSvYdx+ZjOv+zk3Lg98qAC/XAiEAzOJERwT8 atqkCiuPI6ATboB9yTeIll149Ksuq4Z6YHQwDQYJKoZIhvcNAQELBQADggEBAFHP tPgCL/v7OXXSEz82q/HUjNlIC8uDWGVyclbforIa4i7rSf8mR6s/73oAroa/XMXR QPqD3Cl8ctR9j1MPJmJcfvfy60G3knH4JZM0lwDW6qhgkjFIjAP1QK99BjoHWG9l 1PnmvJAaf5R+2LNTOu15D9GHipmi/A8ZPGfIl/66Av44jwOKI7uFT6R9dURmJLZJ CBn2le68phsNBscwogtirZe60yJL2T1T8M42MGgeOcTFl9/r1MMV+bCzPsb/C2ht Buu49VF/vvkz1eNGmC5owNHUzaBYHfXk7adEr+VrS9c0tuyUGrVpVdk5t4jo/7oF LLx6FFTHId645g8Xm/Q= -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAvdR46ekkmbwbTqTPj0ME sjnZZitR1SyM4LeZkDZAQ/kvRtDXoAhi7t7Bjw8/EqOIhDVrHBIiUChvXI0lWaCh nR5w5kZbMcxQ8pWWnZ10voRZLCFdD+yYs2yJ9h2MJCmH5rmPtL4jtAyLhZjCITya hJeEKS+fapAYfZkTYsozdKXJYdXA+m7royR4XbiozDTG35jfPbByBp6aea/Jir5F hiYSwWh6J2kjxBIYPDF5MCgf2Tp9ZQP59qAexukCdQKIeEaBdCY434FGd1w20UxP tI8TnULFI6W52dZBiIH6vES1dxEzSoOVn7RctvA3eZi/tIB+/+L8s45J3XKfeIxf +UUuIRg6XDp7xcJgBOVLataq9tlKknQwLphUho62VF6Sxjqel+ThX1CEliavMFS5 efrKMabab8a4Yo9BXq1wS+v6zGRHPKUbD3b9X9MG9JgTDaBITtL/0AH8xk8bZXiF Uwj4W6HZ1OHWUwy1uYNYiXps4tdtGzEkgRY3SDSqcMuIEx6DNEBRveCGdL/SPHHC Xdh1b/aJmmeDty9jAs4e4QptUnhic0McXohRDdUFpVRV3ew70pXmqgsOJnxcQYge zbO1SvIVZaLEBHBYOhEljpCaUFYV/b0aczFlk2vve9ZKo2wScQINSfVzr+cDIPXG p2U1aaQ4hyoLR1L+1qjOiOUCAwEAAQ== -----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 285653223594789973201634644362862991860131 . . . . . . . . [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 2019-06-18 01:38:31 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-09-16 01:38:31 +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 774438711030098231483429797964614419417325927797503735141378707219946106315269777928458685904236888635495563560883086393368947315850470102723563436774007625949934169006701230307797383829791128851070557201844464834940669475077340554530074012189143870603427689060109977232620538502806349073558110420724267757868657870998374629248530367445277165908460336565085966770776920802976157491869579398957124439417678797958299647657798884336000473003785607891402113684593682406135581761530080186123351257050432283759259251034972528211710219663724330413154873414061641572618763875083002296455930072615794914270238357768353570118352806950606124514784461752797200833762237364668999648589245119459139204090577651688257243735372362442595347949933746574185855882762884335519459361877242398153125156816901705357130788779794310222187531442769876249032928137666389443411017414254993756277413691688388188139544306710466145605488850157379246446239531933512760687114520681241976957444309298574611936192676582075810558459759577454628778815631647614183698577813180427647330140459601046603903010777034727417281266988467694288892801516774466498140414888297318137434003518489909097838554077745622272279597777561593538849155098697679079644358323122671098291718373 . . . . . . . . . . . . . . . . . . . . [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) 63280300cb7ceb1f4f18c1a521b3b431d3dd5f8c . . . . . . . . . . . . . . . . [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) 00f2007700e2694bae26e8e94009e8861bb63b83d43ee7fe7488fba48f2893019dddf1dbfe0000016b68733e8f0000040300483046022100cf4ffdaa471c6fee50c4e05880013af7e9fceef9db2f137db621973d207c5d0202210092fedd218528efa6dd1e30ce03091bc8d396feb2f0e888b95415ebbf4041f4ad007700293c519654c83965baaa50fc5807d4b76fbf587a2972dca4c30cf4e54547f4780000016b68733eb10000040300483046022100ab18e9316389512f60fb5f5f5ba6712bd8771f998cebfece4dcb83df2a002fd7022100cce2444704fc6adaa40a2b8f23a0136e807dc93788965d78f4ab2eab867a6074 . . . . [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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