yushikai.co.uk
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:aa:2e:5b:9f:1d:88:25:29:1c:45:fb:87:4e:ba:7b:45:de 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:aa:2e:5b:9f:1d:88:25:29:1c:45:fb:87:4e:ba:7b:45:deSerial Number (int): 319246480385903390107372022444088499062238
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: d7:2d:4f:71:1a:44:57:30:e7:1e:50:8c:3f:be:92:07:73:46:94:2a
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): 0f:2a:e1:91:c3:fe:3c:79:77:e8:b4:8a:c2:0e:9b:50:47:cd:ea:d7
Fingerprint (sha256): 30:30:08:b8:a4:6c:d6:a8:c5:39:62:84:e1:06:bc:52:4f:36:3d:15:eb:c6:cb:08:fe:4d:1a:a5:62:ca:1c:be
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----- MIIGaTCCBVGgAwIBAgISA6ouW58diCUpHEX7h066e0XeMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xOTA1MjQwMTQxNDlaFw0x OTA4MjIwMTQxNDlaMBkxFzAVBgNVBAMTDnl1c2hpa2FpLmNvLnVrMIICIjANBgkq hkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAwCWph3VJgd58EM1zFqQnywH0q1EeB3k9 W6DlSzQEhlJ3fCR4cBQjru8JuDzqtWzOh/1M1CLZ71FGXLEtTSaNbl5ziPffisaP b0V/pHKsqL52Cuf3KBSUlDzcA4j4+KFWEB+M/q2SSH/uuXCDyJ/Y0P20ZhS7xa+0 AZqGrfOqUCH98cYiwsxDj4Q5hoU5ymEGhsh0fYK4dPvX10q5krEpjNdS7pN3H7rq Np5gipV3g66fCHg5rlGTa0elo7iQK2bRM5yCjHouTjgHssiFEpIWpaGivxNqzUl2 RjDMTG1jJfu4yFaq6v/aYm0ylDPaCel14EzOOzKFiodwcJOOn6p+4V6jw4kb8ZxE 5C/jMxhf8TNZe844Q0kQm2g7m2pe4NDIPZaSFV0X7Jdz4pPUkTuIaTMHEcqhc0Km OIzu2CoqcjawhNbO7IrXW2J8MhKZBCaGTkvJfB6mrLnLe6NBomxQnNAQdgYwYjBQ tZDfp55QRKFPgGRPzFXHdRn+w2MMSIfxUqiEAvsuUq7D+e+4qbkJrMIPHTVWCob/ vo4nsTcNZLoDLa+Azf2ncnNFGA2a+bhNc27PZjuPaCTfjaKT0rcf4IeMmehQFUUu OHr+V2nxavgmiPTcQvj9zJr6k6/Ow1GGROhh8m/bhZJFAHS+dq5QmsmYFmX4n7bZ mTY71Gqr7asCAwEAAaOCAngwggJ0MA4GA1UdDwEB/wQEAwIFoDAdBgNVHSUEFjAU BggrBgEFBQcDAQYIKwYBBQUHAwIwDAYDVR0TAQH/BAIwADAdBgNVHQ4EFgQU1y1P cRpEVzDnHlCMP76SB3NGlCowHwYDVR0jBBgwFoAUqEpqYwR93brm0Tm3pkVl7/Oo 7KEwbwYIKwYBBQUHAQEEYzBhMC4GCCsGAQUFBzABhiJodHRwOi8vb2NzcC5pbnQt eDMubGV0c2VuY3J5cHQub3JnMC8GCCsGAQUFBzAChiNodHRwOi8vY2VydC5pbnQt eDMubGV0c2VuY3J5cHQub3JnLzAtBgNVHREEJjAkghJ3d3cueXVzaGlrYWkuY28u dWuCDnl1c2hpa2FpLmNvLnVrMEwGA1UdIARFMEMwCAYGZ4EMAQIBMDcGCysGAQQB gt8TAQEBMCgwJgYIKwYBBQUHAgEWGmh0dHA6Ly9jcHMubGV0c2VuY3J5cHQub3Jn MIIBBQYKKwYBBAHWeQIEAgSB9gSB8wDxAHcAdH7agzGtMxCRIZzOJU9CcMK//V5C IAjGNzV55hB7zFYAAAFq57dI0gAABAMASDBGAiEAoNZw5FZt+tbHGHb+pMlqbikN ACa8St9mwV6WZvkZ7vQCIQD0ekdSX1KbhOtfjJSSzmQRN/nwBkIlIgGc7turQb8n KAB2ACk8UZZUyDlluqpQ/FgH1Ldvv1h6KXLcpMMM9OVFR/R4AAABaue3SPEAAAQD AEcwRQIhAI7fokPUSz63y1pCG/id7GEufoYF0wYRh8eLwURKlTOlAiAh9SWGjBBi 6TYj2nquNhuGo+hmKEiso1WEkaVLkB3NRjANBgkqhkiG9w0BAQsFAAOCAQEAd5eU aMuBMeem/yV2kT1LkXt1yaJao9XuApfa/1+ZT9CBzwlQaJdrx/DjawIyWISTSBWA qHIiE9x4yoxmChbOmLbElIIDAdBFSp50qOQFVJyMzIaaNwDtBTlYxndWKnVj4saR J7kWb8zr6yRMaT60XXYouFLPkc3tHjQt1vH5Ch6x9Jth3DXv5QP/1DeoFNu9EbxX tAM1Yr/+7Luv5fJr3VF/p9usfUfQUY2/zpGKEhMRzjr+ExYRQXLhX8UZQblsmJYg kwPk7vJ6XaBogUc7p1Qm6rFJpMPlU5C7OI2DL+MqqKad7Sz3Ux7i2Xi8GQAhuRWc YgUX02r1I8h+XKdNXQ== -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAwCWph3VJgd58EM1zFqQn ywH0q1EeB3k9W6DlSzQEhlJ3fCR4cBQjru8JuDzqtWzOh/1M1CLZ71FGXLEtTSaN bl5ziPffisaPb0V/pHKsqL52Cuf3KBSUlDzcA4j4+KFWEB+M/q2SSH/uuXCDyJ/Y 0P20ZhS7xa+0AZqGrfOqUCH98cYiwsxDj4Q5hoU5ymEGhsh0fYK4dPvX10q5krEp jNdS7pN3H7rqNp5gipV3g66fCHg5rlGTa0elo7iQK2bRM5yCjHouTjgHssiFEpIW paGivxNqzUl2RjDMTG1jJfu4yFaq6v/aYm0ylDPaCel14EzOOzKFiodwcJOOn6p+ 4V6jw4kb8ZxE5C/jMxhf8TNZe844Q0kQm2g7m2pe4NDIPZaSFV0X7Jdz4pPUkTuI aTMHEcqhc0KmOIzu2CoqcjawhNbO7IrXW2J8MhKZBCaGTkvJfB6mrLnLe6NBomxQ nNAQdgYwYjBQtZDfp55QRKFPgGRPzFXHdRn+w2MMSIfxUqiEAvsuUq7D+e+4qbkJ rMIPHTVWCob/vo4nsTcNZLoDLa+Azf2ncnNFGA2a+bhNc27PZjuPaCTfjaKT0rcf 4IeMmehQFUUuOHr+V2nxavgmiPTcQvj9zJr6k6/Ow1GGROhh8m/bhZJFAHS+dq5Q msmYFmX4n7bZmTY71Gqr7asCAwEAAQ== -----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 319246480385903390107372022444088499062238 . . . . . . . . [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 2019-05-24 01:41:49 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-08-22 01:41:49 +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 783891850377731782749500697786808629045245524434571550272247045149884835665196648903477981433316845282682410190376044857050946723153901689101825734568069142609566221408290412798462409607277516498739850005434310293712638873473985050521129189981437645993384562872081717581123363305199109638063961212491970927176512692986998899848974343446376243255020984520068984669907820359345390415713217419611372491376358084440879470609667089565135824954731732751321641533806925189770422377892397351049418859296893812244693579900887012320896018579044973762837768589028612584389267322211689181289896969285533347351005766816942647248909062332974115992904939794646514529027107853781838895225469456729658523462358035107664044407430519718593203528296572270032596825439644430397925274450514339544300314580175578496145678828877887142547625583121705309341275003449409857899409501774971508582744372473908901463450180469460731152525183064921602616840832417942633537043932391515818910236634381706130014171754800252069107158524266809931072635758821852742989578566037645776300296886670416078279112710826763003796549219386180836754378289225463440511309280617737734282810679433419951956731986997647288511252889466079377778713813189854374041632732074639758252043691 . . . . . . . . . . . . . . . . . . . . [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) d72d4f711a445730e71e508c3fbe92077346942a . . . . . . . . . . . . . . . . [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 (246 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (243 bytes) 00f1007700747eda8331ad331091219cce254f4270c2bffd5e422008c6373579e6107bcc560000016ae7b748d20000040300483046022100a0d670e4566dfad6c71876fea4c96a6e290d0026bc4adf66c15e9666f919eef4022100f47a47525f529b84eb5f8c9492ce641137f9f006422522019ceedbab41bf2728007600293c519654c83965baaa50fc5807d4b76fbf587a2972dca4c30cf4e54547f4780000016ae7b748f100000403004730450221008edfa243d44b3eb7cb5a421bf89dec612e7e8605d3061187c78bc1444a9533a5022021f525868c1062e93623da7aae361b86a3e8662848aca3558491a54b901dcd46 . . . . [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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