yushikai.co.uk
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:a1:2d:0a:46:82:c4:39:66:3e:ec:3c:73:8a:60:b3:68:35 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:a1:2d:0a:46:82:c4:39:66:3e:ec:3c:73:8a:60:b3:68:35Serial Number (int): 316182187482459800956042064150593417734197
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: 15:12:19:75:35:3b:4f:d2:0e:00:8a:1d:22:c9:b3:15:df:e7:44:35
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): 56:69:c9:b3:03:ac:29:72:6e:ff:79:27:22:72:83:02:bd:db:9d:e2
Fingerprint (sha256): 47:22:9d:a7:01:3a:52:45:90:29:e6:be:bb:c6:f0:b2:f0:1d:5e:2f:af:30:28:d3:2e:f8:ef:57:ef:6e:23:00
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
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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----- MIIGaDCCBVCgAwIBAgISA6EtCkaCxDlmPuw8c4pgs2g1MA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xOTAzMTMwMjM3NTNaFw0x OTA2MTEwMjM3NTNaMBkxFzAVBgNVBAMTDnl1c2hpa2FpLmNvLnVrMIICIjANBgkq hkiG9w0BAQEFAAOCAg8AMIICCgKCAgEA16ls3C9HRsDjpZ/wgJgvgECESkhcHHTS drbLDEae8MNvCTdQRksFDYTzbxLWihTi1+VvDh6BLJ3PlJdZkPTyNSoHqQiYd3A9 tQlddtq8jHhWGHHB+lh/HLOHgWfe3xPJ0PZkui4WZHjJE//Nv23ZZZopn8pQm4/c UTOe/WUmPOyNd6lVd7NVuTkgq4hOUpBTWfxhYctbZMSuWiYBNUD+yY6t+6pt4/+G grx7y7rGLH0v5b9FzbKtVOSLI9l30LiEpqZV0WkyyB9Uk2/4fbDlCRXWerDpLuRW tSqruVm4831jhCYMqb0JhVAW4i5/24EynVrFA9lCECm/LrUJRO4J/yxL2uh5cGNo HWYcGysfh1Ml4oT4OVHEKeOQbPz8CaxjqyqbgTdZKKaYXbp16EwqQ20ZuuO6UNr/ KN2fcA5gOrHT+iyc8O8gjVFrzufqlKm5z3BYxvCk3yqG/ehx1eSzMJxSlhPgplTh 7JPhpKxPd+ae2tkrF1VzMb3XhIWPREpuuCb0nOEIE4qE7wyzZGy72huOxltOSV/p 46mxY7oR/zCNgTjm2iM+vAGzrBKg0vNg69dL6gKJpbWySE9caHXg/txSk/DEDPmp id6osNN8nCg8OMEtPYZPRdVFrYpCcYD8UL5Z1l9zQsc4YS8y30jD0m+miXHA3AFI fTp+397p+O0CAwEAAaOCAncwggJzMA4GA1UdDwEB/wQEAwIFoDAdBgNVHSUEFjAU BggrBgEFBQcDAQYIKwYBBQUHAwIwDAYDVR0TAQH/BAIwADAdBgNVHQ4EFgQUFRIZ dTU7T9IOAIodIsmzFd/nRDUwHwYDVR0jBBgwFoAUqEpqYwR93brm0Tm3pkVl7/Oo 7KEwbwYIKwYBBQUHAQEEYzBhMC4GCCsGAQUFBzABhiJodHRwOi8vb2NzcC5pbnQt eDMubGV0c2VuY3J5cHQub3JnMC8GCCsGAQUFBzAChiNodHRwOi8vY2VydC5pbnQt eDMubGV0c2VuY3J5cHQub3JnLzAtBgNVHREEJjAkghJ3d3cueXVzaGlrYWkuY28u dWuCDnl1c2hpa2FpLmNvLnVrMEwGA1UdIARFMEMwCAYGZ4EMAQIBMDcGCysGAQQB gt8TAQEBMCgwJgYIKwYBBQUHAgEWGmh0dHA6Ly9jcHMubGV0c2VuY3J5cHQub3Jn MIIBBAYKKwYBBAHWeQIEAgSB9QSB8gDwAHYAdH7agzGtMxCRIZzOJU9CcMK//V5C IAjGNzV55hB7zFYAAAFpdSC+ZwAABAMARzBFAiEA7sR0cXlZLDrxVWffl6YWw8uD zHPrRoCDwTgwK38JS54CIANuLF9U0oaMjUPZAziXUyLAexMECfNH8vRddh8HaXaw AHYAY/Lbzeg7zCzPC3KEJ1drM6SNYXePvXWmOLHHaFRL2I0AAAFpdSC+JgAABAMA RzBFAiB3jjSkRaZN5+hWymTezx4VmJ6/XKRHd3iLq5ZdgrQzEwIhAPU/HCB9aAbW qYK+H5ISFtl5YK3vvsURZ6yLZv5lwRQcMA0GCSqGSIb3DQEBCwUAA4IBAQBeodi0 c8uL5nucr8Yj2Y59nWCbIeCDo95UOZXBvU+DmWgjYkhLvW2VW7dO55O9YbFZs0Ha aQC3Fu1hZTi7vDIqYP3TkNthtOq0aY4hMx3eElGbAP+WiVn4vB0eQWmEh3STdbGl Fuv21NI+6CTYNS+f75CQxRsKhH0/npNYKST9UsjmuwLPy8/lGUyKF12jSn/EoSgY GyWo/VMRaWFsJQiA9yNcFvO4FTND5ImKkKleuVSWAULzxJQ/gKxFVedVD++WW9tW P8wmsiCTY9qZb237KCVTFr/x0tUyY/rFKU/t3lQn1Wmk3VY3ynrQxVOqz5qYgySX YjD9CBP+ZxesUWQ1 -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEA16ls3C9HRsDjpZ/wgJgv gECESkhcHHTSdrbLDEae8MNvCTdQRksFDYTzbxLWihTi1+VvDh6BLJ3PlJdZkPTy NSoHqQiYd3A9tQlddtq8jHhWGHHB+lh/HLOHgWfe3xPJ0PZkui4WZHjJE//Nv23Z ZZopn8pQm4/cUTOe/WUmPOyNd6lVd7NVuTkgq4hOUpBTWfxhYctbZMSuWiYBNUD+ yY6t+6pt4/+Ggrx7y7rGLH0v5b9FzbKtVOSLI9l30LiEpqZV0WkyyB9Uk2/4fbDl CRXWerDpLuRWtSqruVm4831jhCYMqb0JhVAW4i5/24EynVrFA9lCECm/LrUJRO4J /yxL2uh5cGNoHWYcGysfh1Ml4oT4OVHEKeOQbPz8CaxjqyqbgTdZKKaYXbp16Ewq Q20ZuuO6UNr/KN2fcA5gOrHT+iyc8O8gjVFrzufqlKm5z3BYxvCk3yqG/ehx1eSz MJxSlhPgplTh7JPhpKxPd+ae2tkrF1VzMb3XhIWPREpuuCb0nOEIE4qE7wyzZGy7 2huOxltOSV/p46mxY7oR/zCNgTjm2iM+vAGzrBKg0vNg69dL6gKJpbWySE9caHXg /txSk/DEDPmpid6osNN8nCg8OMEtPYZPRdVFrYpCcYD8UL5Z1l9zQsc4YS8y30jD 0m+miXHA3AFIfTp+397p+O0CAwEAAQ== -----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 316182187482459800956042064150593417734197 . . . . . . . . [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 2019-03-13 02:37:53 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-06-11 02:37:53 +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 879823453741230865071908004010271072526741796084095007659583032543977086094473077934534612530956233828974590434849641707311956351617467775946170697827603769714731667630642521346423502418888973615381649908838030945941962851342221549308628811229903724424196601407675632388122645379024729405762853972623133066967726176298604336577731895490304528658461083843052118790136925860515964493866425227526994616291196363108469491298421942933289262386893411342568305304565090676423868046429662573805399946308580762039847048457628830059590533531291016117822420953250762678965117351421656189351634853986606327802248474315616451672373091394225993258073793038678113912347218840604513071492360400948537486501591888927258248956699703282131652708253627353437756421979146589229230113360653198977329585809532452044351295347165976508962321800416379202212951659846978269742911470968267987498342086526565853674269278865474865708470782102860169021351620847231202864568176523772527417398240558012722284646955462822316589639637085275902222947396064628439033949765319538717540462526557977344363440083203928871414323070375488810749814401054634152189621715655353119406168231096264099495671304331988684148237050349142827065302111932820047270972178217495704214567149 . . . . . . . . . . . . . . . . . . . . [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) . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:21|false] VideotexString 'u5;O���"ɳ��D5' . . . . . . . . . . . . . . . . [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) 00f0007600747eda8331ad331091219cce254f4270c2bffd5e422008c6373579e6107bcc56000001697520be670000040300473045022100eec4747179592c3af15567df97a616c3cb83cc73eb468083c138302b7f094b9e0220036e2c5f54d2868c8d43d90338975322c07b130409f347f2f45d761f076976b000760063f2dbcde83bcc2ccf0b728427576b33a48d61778fbd75a638b1c768544bd88d000001697520be2600000403004730450220778e34a445a64de7e856ca64decf1e15989ebf5ca44777788bab965d82b43313022100f53f1c207d6806d6a982be1f921216d97960adefbec51167ac8b66fe65c1141c . . . . [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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