yushikai.co.uk
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:b7:c7:3b:dd:39:7a:d0:5f:b9:82:de:5a:05:d0:04:7c:3a 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:b7:c7:3b:dd:39:7a:d0:5f:b9:82:de:5a:05:d0:04:7c:3aSerial Number (int): 323873358145454867317355001048221417241658
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: 27:34:d3:24:b5:12:06:6b:44:df:55:1a:5a:97:6c:81:d5:d8:03:97
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): b0:7e:82:da:ca:08:79:6d:87:f5:01:8d:91:8e:4c:7b:f4:89:99:f3
Fingerprint (sha256): 1d:e6:f8:ec:18:75:fe:cb:2b:13:73:b7:f8:8a:da:33:a0:a0:a3:a6:d5:2f:da:12:74:6e:6b:31:8e:75:a7:d0
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
www.yushikai.co.uk
yushikai.co.uk
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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----- MIIGZzCCBU+gAwIBAgISA7fHO905etBfuYLeWgXQBHw6MA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xOTA1MjMwMTQyMDNaFw0x OTA4MjEwMTQyMDNaMBkxFzAVBgNVBAMTDnl1c2hpa2FpLmNvLnVrMIICIjANBgkq hkiG9w0BAQEFAAOCAg8AMIICCgKCAgEArb2TTr1XKBpr3oM/Y2rFskK09Op4wCdb lrmcmtrCFxVSSBgT2cPlUqWvgAoUPO4pjAUa0D/emzhcVDBLxo8Kc0JZDJgGdkzV vi0WE/w3nLCqg7xKY50SAW9zn35w68fVESWfDQcfPYBWxCMK31BCT9YxDwEmUM+3 pHY5nXMi6J8nGdk4J9N5utl1kjk5JV/vbLurkHMvGjSonKKM6H6aTGQxbjAoxw47 9iNclQHZRxWnGvsimtgHQyjpFI+ASRWAfn921dCIjbVW+j19SINZubHNgVQVLy9J V5YIN/CovovYX5UyAwUVXbsCOqA/AkPSuUGg913e8lokok5noF0ZAqv29jIKqITS 8IbCjHiGbsiVlUf1tPzpoeLqVSldRKWtRpS+NLOgSu/rnItjLzbWKyjSXDi6WRzd j8YZPYXen6C7jy5FmkmaN9Gu+Z223+ziSDs5PH7WeNUc7ml73g3g35JwFc8xwXIr xWBbeEZryFzodqdsRn75UaRVn5aKIcUI9AmRmVf8ZKAIl6dfZEZJn/nfOnzkD+Wd 9C7SoADlxmsCeg0Iw4U3rD4kX0vftqi+Qu+xHyY7YeEACN6Hi5A+/aF4YojLX/hd KW3B8FpFawVkIoueuaWNdAe9MJze8cGc2uL/8/UaB/D5QLulYUU9jOKgigiUjGQC DYgZwDtUiVsCAwEAAaOCAnYwggJyMA4GA1UdDwEB/wQEAwIFoDAdBgNVHSUEFjAU BggrBgEFBQcDAQYIKwYBBQUHAwIwDAYDVR0TAQH/BAIwADAdBgNVHQ4EFgQUJzTT JLUSBmtE31UaWpdsgdXYA5cwHwYDVR0jBBgwFoAUqEpqYwR93brm0Tm3pkVl7/Oo 7KEwbwYIKwYBBQUHAQEEYzBhMC4GCCsGAQUFBzABhiJodHRwOi8vb2NzcC5pbnQt eDMubGV0c2VuY3J5cHQub3JnMC8GCCsGAQUFBzAChiNodHRwOi8vY2VydC5pbnQt eDMubGV0c2VuY3J5cHQub3JnLzAtBgNVHREEJjAkghJ3d3cueXVzaGlrYWkuY28u dWuCDnl1c2hpa2FpLmNvLnVrMEwGA1UdIARFMEMwCAYGZ4EMAQIBMDcGCysGAQQB gt8TAQEBMCgwJgYIKwYBBQUHAgEWGmh0dHA6Ly9jcHMubGV0c2VuY3J5cHQub3Jn MIIBAwYKKwYBBAHWeQIEAgSB9ASB8QDvAHYA4mlLribo6UAJ6IYbtjuD1D7n/nSI +6SPKJMBnd3x2/4AAAFq4pEiQwAABAMARzBFAiAPoYQRXDC4YJWoKjAWWO+ep5Xi gVXra7n7s+e8hfaQ5AIhAP4Q8779NmOALC/GbCJu7Ubk7KxlBmsE91ySyks3YPis AHUAKTxRllTIOWW6qlD8WAfUt2+/WHopctykwwz05UVH9HgAAAFq4pEkWAAABAMA RjBEAiAWQo2lekaDCre5p7Q1TOnFmRJhrz8u1rPu4MDSrj/HigIgcgXXL3Vb9SN5 Wqnb+qk0jcp0VLBVyCfFmsljoxJlTZ4wDQYJKoZIhvcNAQELBQADggEBACHa6bwk 8JRPDhGgw3/NgYn5+Fjo6wMqSPeueuhKo4h2FJqTSRRRZK1v3iP5QeBKzHYw+VKO 8dH+k4gUFFq/iimXTbYcLQRESn8ZeCMQIy4S5Yjs380xwYXZHABr2vGKt5VjvlaN D/jtGxlcFNFs0Og3TDAgAqhqAsb6EHApCNdDlisqaqH4Bs0ehhp1pZix5shbi4NE JUcufrnXazskfnNevVGvPHbLD3VFjV3TBQHzNrvMNbhqII4EkVPngsxyokoNYNrD P+0Pg8IqiJp3m+zkqzuG2G0LNFCXkkajmIRW1VTUzl6YnOODxu8RrqdUIR/N/vq2 x2SqNTFmckPdT8g= -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEArb2TTr1XKBpr3oM/Y2rF skK09Op4wCdblrmcmtrCFxVSSBgT2cPlUqWvgAoUPO4pjAUa0D/emzhcVDBLxo8K c0JZDJgGdkzVvi0WE/w3nLCqg7xKY50SAW9zn35w68fVESWfDQcfPYBWxCMK31BC T9YxDwEmUM+3pHY5nXMi6J8nGdk4J9N5utl1kjk5JV/vbLurkHMvGjSonKKM6H6a TGQxbjAoxw479iNclQHZRxWnGvsimtgHQyjpFI+ASRWAfn921dCIjbVW+j19SINZ ubHNgVQVLy9JV5YIN/CovovYX5UyAwUVXbsCOqA/AkPSuUGg913e8lokok5noF0Z Aqv29jIKqITS8IbCjHiGbsiVlUf1tPzpoeLqVSldRKWtRpS+NLOgSu/rnItjLzbW KyjSXDi6WRzdj8YZPYXen6C7jy5FmkmaN9Gu+Z223+ziSDs5PH7WeNUc7ml73g3g 35JwFc8xwXIrxWBbeEZryFzodqdsRn75UaRVn5aKIcUI9AmRmVf8ZKAIl6dfZEZJ n/nfOnzkD+Wd9C7SoADlxmsCeg0Iw4U3rD4kX0vftqi+Qu+xHyY7YeEACN6Hi5A+ /aF4YojLX/hdKW3B8FpFawVkIoueuaWNdAe9MJze8cGc2uL/8/UaB/D5QLulYUU9 jOKgigiUjGQCDYgZwDtUiVsCAwEAAQ== -----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 323873358145454867317355001048221417241658 . . . . . . . . [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 2019-05-23 01:42:03 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-08-21 01:42:03 +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 708799518449308157821971473900736159329173379062477743262231825646320252002669273853941471725742264229908469911183182467491952065705696790167997819319353464594822171154284852822610589532596390154999261853842902796980429724613983809538891631807964552702493893618200830754009519050759079830484513701517229704756273290784640921724619294861253107653216901579985855153628029579584984958377564615994447466685806395736962191940363542792944363378530794373333099283361165652180475172906991650185598598376547465770665486871316572395882600217569278979220789577359548582553935445461731714207499159990190454802637910476334789446985951194996460386853636275570141515080798391953479554932362525686470706757155489653781556806923361402991362427754055027353692294200690483778283302001859619969855833501859351937416133954764214979043865946032214252554169979845363183946941380624326052193066657434544515611020195336975653523408830708361671038631281143332589837691718928099729929216765722025543552481520633035241036537403644252062988835012871393401098411388595218569060267943727467836406923107716418312388189531520284992868673116777119500858669218864055943254785790872448652493598672772687558158971109580132223263317356672234990959615898092546303563434331 . . . . . . . . . . . . . . . . . . . . [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) 2734d324b512066b44df551a5a976c81d5d80397 . . . . . . . . . . . . . . . . [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) 00ef007600e2694bae26e8e94009e8861bb63b83d43ee7fe7488fba48f2893019dddf1dbfe0000016ae2912243000004030047304502200fa184115c30b86095a82a301658ef9ea795e28155eb6bb9fbb3e7bc85f690e4022100fe10f3befd3663802c2fc66c226eed46e4ecac65066b04f75c92ca4b3760f8ac007500293c519654c83965baaa50fc5807d4b76fbf587a2972dca4c30cf4e54547f4780000016ae29124580000040300463044022016428da57a46830ab7b9a7b4354ce9c5991261af3f2ed6b3eee0c0d2ae3fc78a02207205d72f755bf523795aa9dbfaa9348dca7454b055c827c59ac963a312654d9e . . . . [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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