yushikai.co.uk
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:c0:8e:5c:dc:e0:83:35:c9:76:b4:44:88:b3:ac:5b:4a:50 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:c0:8e:5c:dc:e0:83:35:c9:76:b4:44:88:b3:ac:5b:4a:50Serial Number (int): 326860304790731196950236897726444844304976
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: a2:b4:ea:b1:ea:d5:17:e8:1a:75:20:5a:9c:57:fa:e2:10:04:2e:c5
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): 8a:39:82:64:95:78:2f:be:3a:56:ba:76:bf:40:a3:9a:be:5e:b6:2d
Fingerprint (sha256): 21:df:13:10:30:f6:17:4e:f0:3d:18:40:c9:12:57:e0:15:ba:eb:60:79:b0:da:e5:3f:42:9b:a1:87:03:93:40
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----- MIIGaDCCBVCgAwIBAgISA8COXNzggzXJdrREiLOsW0pQMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xODEyMzEwMjUwNDJaFw0x OTAzMzEwMjUwNDJaMBkxFzAVBgNVBAMTDnl1c2hpa2FpLmNvLnVrMIICIjANBgkq hkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAxxKGOsLd8qF3XTHzJrIzhiAQquhx2MuU +J+AYkpwGbkgvRfIVly633HFHUPT3pCEaCOSw12a7xWxZxrOO5rVxA0+OG5heVsL 9kDa+lhe6NWlAyn+2IdULO5C57EN9JXBKue2kerJqu0k/gOq1bpFKoOSTsTMuEf4 BLU4Pe3bUsp5m3oZ6RIn5BxE0a5DDPVb9tRWBcn+Y2vBkWB+aTqnrpQgYD3WP2Zs XKXSXBjBBqPY2bgTgC1APkMXIzsc3Km3LYPWlJKAfE7Wg95R+4RBmFozmPyQvrJd mjc22MPjn75UPiOMLJS+eP+twalw35Y8uiXgLkSf+wb9gLWBlYg8F13VD+DslbiQ p1DFkjkw6EU2qnvnFn43OGpWvxCGzp32I3m6JsJ9HrPkneR92JtyH309J1tZIrOE X0QBJat+d3x2G9MR76IiKIRpwz6xpfMcgyl1uxWwxywm9IJI4PKjOvTYNvs1VhyF MsgXbxJKZfFb3Iga+mAyy1e+Z4zoMSyBbLDYbjyrWokm4e7b7pB13LGPePykLoNV GjGlLmrbyD4XG5evtac3Ch0fJ1UkkvoV7CUgrxSmcXzaZKLYHgigxPrqHEP/9eKX JEuoLtddY5wBkQGTjC6gi3fTA396MkHR9w1W+26PTc1xw86Q1QRNkE2zcfSXEZ5M V6Qrzm1qpN0CAwEAAaOCAncwggJzMA4GA1UdDwEB/wQEAwIFoDAdBgNVHSUEFjAU BggrBgEFBQcDAQYIKwYBBQUHAwIwDAYDVR0TAQH/BAIwADAdBgNVHQ4EFgQUorTq serVF+gadSBanFf64hAELsUwHwYDVR0jBBgwFoAUqEpqYwR93brm0Tm3pkVl7/Oo 7KEwbwYIKwYBBQUHAQEEYzBhMC4GCCsGAQUFBzABhiJodHRwOi8vb2NzcC5pbnQt eDMubGV0c2VuY3J5cHQub3JnMC8GCCsGAQUFBzAChiNodHRwOi8vY2VydC5pbnQt eDMubGV0c2VuY3J5cHQub3JnLzAtBgNVHREEJjAkghJ3d3cueXVzaGlrYWkuY28u dWuCDnl1c2hpa2FpLmNvLnVrMEwGA1UdIARFMEMwCAYGZ4EMAQIBMDcGCysGAQQB gt8TAQEBMCgwJgYIKwYBBQUHAgEWGmh0dHA6Ly9jcHMubGV0c2VuY3J5cHQub3Jn MIIBBAYKKwYBBAHWeQIEAgSB9QSB8gDwAHYA4mlLribo6UAJ6IYbtjuD1D7n/nSI +6SPKJMBnd3x2/4AAAFoAmKWuAAABAMARzBFAiBiT8CLPgjV3BeNFwRoIwsepMbP z9Baw7W6CIKnHVWH2AIhAKvPW8T0DUVnWF1VcrxlnvI/CobcHwa+R/xCcv8msKNS AHYAY/Lbzeg7zCzPC3KEJ1drM6SNYXePvXWmOLHHaFRL2I0AAAFoAmKXFQAABAMA RzBFAiBTMoXGUSbn+wwl1ts+fxUtqCmDTt8/SAnnEX2saXf+kQIhAJnUoFiEYQNF rw8MuNzslnDwxW+QcVaItuj8R8spDzevMA0GCSqGSIb3DQEBCwUAA4IBAQAR7hzs X1grmlE9D+aEa8jHtW9QKFwNgWeBFkDj828nnwlFDaxoKtMOaU2imtPE0MVsRLGt YiXUHDvIdpIKvmla1k3waSzUhszYEMpGmCEi70YMF2YSKMBCHrkVGtnLWMPkZdKs OZn4jCqVeU0Tx5BLRn+jMHf1ya2qXrjBLA202dALkX9yDL62gPY+jJr1fUqD8aC9 y0TJ1vnLw2jUu4XcUL/p3sRnqqycaDijJ0hIB5oDTgLVqvi28RxFnttj2+cdRwIy jgoUBQZS/9q/tV0ILClq5zRGF86UCXxF47SSJD/aR6Ux1OH99mB4CTSYHRewwyvk Dey0A4QYxJAAZciE -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAxxKGOsLd8qF3XTHzJrIz hiAQquhx2MuU+J+AYkpwGbkgvRfIVly633HFHUPT3pCEaCOSw12a7xWxZxrOO5rV xA0+OG5heVsL9kDa+lhe6NWlAyn+2IdULO5C57EN9JXBKue2kerJqu0k/gOq1bpF KoOSTsTMuEf4BLU4Pe3bUsp5m3oZ6RIn5BxE0a5DDPVb9tRWBcn+Y2vBkWB+aTqn rpQgYD3WP2ZsXKXSXBjBBqPY2bgTgC1APkMXIzsc3Km3LYPWlJKAfE7Wg95R+4RB mFozmPyQvrJdmjc22MPjn75UPiOMLJS+eP+twalw35Y8uiXgLkSf+wb9gLWBlYg8 F13VD+DslbiQp1DFkjkw6EU2qnvnFn43OGpWvxCGzp32I3m6JsJ9HrPkneR92Jty H309J1tZIrOEX0QBJat+d3x2G9MR76IiKIRpwz6xpfMcgyl1uxWwxywm9IJI4PKj OvTYNvs1VhyFMsgXbxJKZfFb3Iga+mAyy1e+Z4zoMSyBbLDYbjyrWokm4e7b7pB1 3LGPePykLoNVGjGlLmrbyD4XG5evtac3Ch0fJ1UkkvoV7CUgrxSmcXzaZKLYHgig xPrqHEP/9eKXJEuoLtddY5wBkQGTjC6gi3fTA396MkHR9w1W+26PTc1xw86Q1QRN kE2zcfSXEZ5MV6Qrzm1qpN0CAwEAAQ== -----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 326860304790731196950236897726444844304976 . . . . . . . . [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 2018-12-31 02:50:42 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-03-31 02:50:42 +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 812144375355638200152652371452395387114599030377955613587944728875993591627838345055164973361828034632855920082266216688519123627267690703120967571803110860193287796651225004011121363603924468562751446220330029389686980783474833720558430216979282801364125761108859709382160294098477727182184868766211614826886356959279400770438759794892076645469537048585234942520848763848935242408298187356830929217114127093060858299971086675244870207618033500787978541887012086350845942666880869501729999447475881624280320869506271478576893205094314140533543621028375002785946809678468033370195387989187620463594953451112541836174227469057800843512851274284009322140769589379624542622413151325567884370741547358753212101714528284917924045198702543600080210555351424326159981950177988049990726101234057262973696750008577578557552622045301749840789982701386332091631525453676222020977884446743004276274694613776412958482437256474456833095655674276012808192810182418558789936981673769533768043426196162404042292459005849894629944385802184425323990328202576574879282914816993104845419274775293201573392834959463139276004459095005599930712414967069423004524658897395767742061608434293885955292521902709559812688216984500478626084133545089350948142884061 . . . . . . . . . . . . . . . . . . . . [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) a2b4eab1ead517e81a75205a9c57fae210042ec5 . . . . . . . . . . . . . . . . [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) 00f0007600e2694bae26e8e94009e8861bb63b83d43ee7fe7488fba48f2893019dddf1dbfe00000168026296b800000403004730450220624fc08b3e08d5dc178d170468230b1ea4c6cfcfd05ac3b5ba0882a71d5587d8022100abcf5bc4f40d4567585d5572bc659ef23f0a86dc1f06be47fc4272ff26b0a35200760063f2dbcde83bcc2ccf0b728427576b33a48d61778fbd75a638b1c768544bd88d000001680262971500000403004730450220533285c65126e7fb0c25d6db3e7f152da829834edf3f4809e7117dac6977fe9102210099d4a05884610345af0f0cb8dcec9670f0c56f90715688b6e8fc47cb290f37af . . . . [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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