yushikai.co.uk
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:b0:df:1d:83:25:2d:b0:6d:e1:84:f7:39:b3:11:7c:13:ce 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:b0:df:1d:83:25:2d:b0:6d:e1:84:f7:39:b3:11:7c:13:ceSerial Number (int): 321523125452976083465765269744853150602190
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: 93:b9:8a:6e:d7:0a:40:95:be:36:1b:5d:e6:2a:07:15:63:c0:0a:e1
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): 57:df:63:ec:1e:59:9d:3d:8b:f0:c3:a6:b4:7b:23:45:e7:fe:01:09
Fingerprint (sha256): 27:e9:3e:1a:9e:7a:e5:7e:c8:33:df:12:52:e8:5f:63:79:0c:ca:c4:92:b9:c5:4a:5e:22:8b:bc:fe:85:4d:de
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----- MIIGZzCCBU+gAwIBAgISA7DfHYMlLbBt4YT3ObMRfBPOMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xOTA4MTkwMTM4MjhaFw0x OTExMTcwMTM4MjhaMBkxFzAVBgNVBAMTDnl1c2hpa2FpLmNvLnVrMIICIjANBgkq hkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAqJmDV0f+YceqewPZ1uGjcuSRL7icQ7/6 uAQfi4fljuMxL3ebe/0TY9/nIbZ87102Ni30BeoWvguCm1mJugfN91LKZvBwHC1a +gUE/t5wIvvUJMy5USoteUE72TiNJk64kWPLuYQxgX2pWKfMlQWueI+eTBMW31xp 8REXsJwV9MTOL9vu1Cep2828dD1EpbwIUar5M+90ky2qDpYf3SaKY7cWvBib+Uqp wQnUfYiHmcSrpByg0ai68rOQqm0O6yRrOlTbXYzZBgJq0raM7pS1WiPhYbP6JBrg U0bN6m3vSanO98nq3fWDd/mxUcUWsJ+3KeLh7I5KubdJSbaewvq/cXpV/nzQJaDF kt/yfAkSVPfMUg2J8KMD5tMW3zF0kWjW5gq8QygfwPmNomRtjcFFHVciHk/2gMY1 DWYMQ/txlgmTocOehe+PhY1U+FEtwjr37ya6IwLZ625jQ30+qIMFtXXu1sxdwTH+ HvCb2eLVo5Hj6BlxKrdFOSqH+yG6w3q+ZTxRgQAm8i0StjEyK9FlFbaG/cjkZT0Z /RgX1sCAnY2aeCUfrsC3dNYHrtvDOq+8cvn+Yt59xyLpftLaaDdVGvirt81tRaW/ 6A4ubm71OBPGpyj/2P/PDMDrF44IM9S6Wcfg735g+LVdkWWto2u3YiikiOlV9etY PiDKGvTkea8CAwEAAaOCAnYwggJyMA4GA1UdDwEB/wQEAwIFoDAdBgNVHSUEFjAU BggrBgEFBQcDAQYIKwYBBQUHAwIwDAYDVR0TAQH/BAIwADAdBgNVHQ4EFgQUk7mK btcKQJW+Nhtd5ioHFWPACuEwHwYDVR0jBBgwFoAUqEpqYwR93brm0Tm3pkVl7/Oo 7KEwbwYIKwYBBQUHAQEEYzBhMC4GCCsGAQUFBzABhiJodHRwOi8vb2NzcC5pbnQt eDMubGV0c2VuY3J5cHQub3JnMC8GCCsGAQUFBzAChiNodHRwOi8vY2VydC5pbnQt eDMubGV0c2VuY3J5cHQub3JnLzAtBgNVHREEJjAkghJ3d3cueXVzaGlrYWkuY28u dWuCDnl1c2hpa2FpLmNvLnVrMEwGA1UdIARFMEMwCAYGZ4EMAQIBMDcGCysGAQQB gt8TAQEBMCgwJgYIKwYBBQUHAgEWGmh0dHA6Ly9jcHMubGV0c2VuY3J5cHQub3Jn MIIBAwYKKwYBBAHWeQIEAgSB9ASB8QDvAHYAb1N2rDHwMRnYmQCkURX/dxUcEdkC wQApBo2yCJo32RMAAAFsp7150gAABAMARzBFAiEA4aUoEAcTmZzRV+aX7tqAkylv r1HCqBqFU9mAGxLGR8gCIDdutJzDdbhaFzRbwICJBPgbcf+pUQjpfrqtMPjHn0Xy AHUAY/Lbzeg7zCzPC3KEJ1drM6SNYXePvXWmOLHHaFRL2I0AAAFsp7147AAABAMA RjBEAiBkgYMw4MIGVH52FNJn377KDO2wmF2PRGYnBthoXL79TwIgBdAst/ctz8Ra YzWMwb9LEfTHedBPRVsdQWIh0GVJRSwwDQYJKoZIhvcNAQELBQADggEBABqbQBeH fru8w8cH5TM9I0zEYkaN6LixhqlPfxdv70ZvId7chH4e+AEqYJyq7c6RarfJVBGa lVYVNF1Teg6fb+yB1lUjIoj0Kraka+ff4ZOeSedfxZdL1ZCynhrmPxLWV8WxdGUs +umBhl4vj/7qzGqPN+0qhM/k8Jy1N8KOuaWVdePixI7GAf5WCd8j0pKuYKN0Ou1J Q3q5ALxH+S6qPScePcss3tKAq4s/Yqbn/LCoR51fyVTLb/gl4VVkGO/4apdiXaOQ dYUf7Fo/GQB3aBm9DENoJot2Ac11uf04kdeUZgehV8BV3BPPkKFr2l18QjMBRUEB 2hFzzWOBGxZyI9o= -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAqJmDV0f+YceqewPZ1uGj cuSRL7icQ7/6uAQfi4fljuMxL3ebe/0TY9/nIbZ87102Ni30BeoWvguCm1mJugfN 91LKZvBwHC1a+gUE/t5wIvvUJMy5USoteUE72TiNJk64kWPLuYQxgX2pWKfMlQWu eI+eTBMW31xp8REXsJwV9MTOL9vu1Cep2828dD1EpbwIUar5M+90ky2qDpYf3SaK Y7cWvBib+UqpwQnUfYiHmcSrpByg0ai68rOQqm0O6yRrOlTbXYzZBgJq0raM7pS1 WiPhYbP6JBrgU0bN6m3vSanO98nq3fWDd/mxUcUWsJ+3KeLh7I5KubdJSbaewvq/ cXpV/nzQJaDFkt/yfAkSVPfMUg2J8KMD5tMW3zF0kWjW5gq8QygfwPmNomRtjcFF HVciHk/2gMY1DWYMQ/txlgmTocOehe+PhY1U+FEtwjr37ya6IwLZ625jQ30+qIMF tXXu1sxdwTH+HvCb2eLVo5Hj6BlxKrdFOSqH+yG6w3q+ZTxRgQAm8i0StjEyK9Fl FbaG/cjkZT0Z/RgX1sCAnY2aeCUfrsC3dNYHrtvDOq+8cvn+Yt59xyLpftLaaDdV Gvirt81tRaW/6A4ubm71OBPGpyj/2P/PDMDrF44IM9S6Wcfg735g+LVdkWWto2u3 YiikiOlV9etYPiDKGvTkea8CAwEAAQ== -----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 321523125452976083465765269744853150602190 . . . . . . . . [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 2019-08-19 01:38:28 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-11-17 01:38:28 +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 687826604232317536956930028016218953450578710785215790626978245254504955226790457652817015582750470017243567954597602693035413596206966990882334390983775226966353446000928465241692324331406164843322624426991330490694267644294447619942378699572493411498094813699256146603439842574129803786550176086276519073294262938277505625593663947887634686739740205493670739996273841356187027885900510509937006547684027972195208124820722796271088505405804464873571113141732368525419040428296293925468281566599988257719005259768284226784715886318247673578201679994990091329317168113409258215430942221557909987328541664945363611781763272368288307294170507779879105891656840683907821937051869937144362712137859867378849711794558070913133965223499171473844193177712883763503100404505660665701568658765063297609068975411922747796191177271942877534223155615735122057577144490837412009566725348072404228431586623149311290172453564820775242413424139381147392065753876646238736926128832664879387366420057465191381642934398523073677331848977536020501905870611034439894216058517135902138418717929957822625417351746534949076725881567114978639357561883780161506563574372261073283914708111441897705463525471890497864849823520180287812210785799717419105747499439 . . . . . . . . . . . . . . . . . . . . [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) 93b98a6ed70a4095be361b5de62a071563c00ae1 . . . . . . . . . . . . . . . . [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 (244 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (241 bytes) 00ef0076006f5376ac31f03119d89900a45115ff77151c11d902c10029068db2089a37d9130000016ca7bd79d20000040300473045022100e1a528100713999cd157e697eeda8093296faf51c2a81a8553d9801b12c647c80220376eb49cc375b85a17345bc0808904f81b71ffa95108e97ebaad30f8c79f45f200750063f2dbcde83bcc2ccf0b728427576b33a48d61778fbd75a638b1c768544bd88d0000016ca7bd78ec0000040300463044022064818330e0c206547e7614d267dfbeca0cedb0985d8f44662706d8685cbefd4f022005d02cb7f72dcfc45a63358cc1bf4b11f4c779d04f455b1d416221d06549452c . . . . [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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