yushikai.co.uk
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:28:42:54:69:12:7a:74:0d:0d:b5:11:d6:ef:d0:a9:5b:b2 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): 03:28:42:54:69:12:7a:74:0d:0d:b5:11:d6:ef:d0:a9:5b:b2Serial Number (int): 275036319803893212628458182015237304703922
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: f0:c5:c4:dc:0d:f8:97:61:f0:ed:16:47:11:9f:a6:1b:f0:96:4a:3c
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): 90:a1:ef:63:22:cf:f2:71:27:19:87:a0:84:5d:c5:88:88:ea:ae:a8
Fingerprint (sha256): 2b:d1:ea:5a:eb:20:63:7c:9c:14:85:93:dc:67:50:14:af:f7:29:06:14:80:9f:6f:e9:12:37:02:30:89:65:0d
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----- MIIGZjCCBU6gAwIBAgISAyhCVGkSenQNDbUR1u/QqVuyMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xOTA3MDUwMTM3MzdaFw0x OTEwMDMwMTM3MzdaMBkxFzAVBgNVBAMTDnl1c2hpa2FpLmNvLnVrMIICIjANBgkq hkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAxxmu1EmIgcjwnQzs/6OtnfI32h7UQkmX noaJhlvt+bpPiglbT0ZnBpX/7IDWfKEKsTv+RLdYMIlBXM9j9+YeWikT7RekyBeM jxOYuCr6QBK5e0zChMiG8+Zq/3pxlCfTVmqLbmP4i+H7hDzC5ID+EF/kq6h9Xqo1 jJ7Ny3Z0sH9Dm+Md1x7y3GDlUpZu4qA2X+2K/ifnxIw/FiORsaWWPlKSVCnFmLTP UZcyZoFgLKx9vlHGL9QPyUSwJz6D5bZCPLSNsGfjiHFJalKqACl9GG2VgKTRgPWS UJW7UGWBD4kcL2XN76FUOiJNs1B5B6AbPhcVcHrk9R1SW//+bXbSiom66hL7MyFi UpF5sLBIg+d20zEQ1L9aKhDPGOh/adJjuPJPvJpN1t8V0/lF/LKwvIjtDiIz2uNG mJfBFqVq/IwHhq/F4wRB1AVHzg/jbngvTU3gtJcTnksMj9iyc8UVJcOj01qxfp4t BS288780dMuK1Oil9j4Qa/wClgIO1FmBdR6ONiEpuV0R6b35zZPPwGJZO+B3v5wA 0Np/kb6vDbmK0sik/5haZw/uGE2fHxTitUKZs0T4+yOQLzHUbUvW99pUdq9c8R27 ArJ3lcgZwuoX0wryefChVCggowSQdHA0fvLFnUanx4Ok9CAyPxW6O210FnjsFjuX F+CTTzNCml0CAwEAAaOCAnUwggJxMA4GA1UdDwEB/wQEAwIFoDAdBgNVHSUEFjAU BggrBgEFBQcDAQYIKwYBBQUHAwIwDAYDVR0TAQH/BAIwADAdBgNVHQ4EFgQU8MXE 3A34l2Hw7RZHEZ+mG/CWSjwwHwYDVR0jBBgwFoAUqEpqYwR93brm0Tm3pkVl7/Oo 7KEwbwYIKwYBBQUHAQEEYzBhMC4GCCsGAQUFBzABhiJodHRwOi8vb2NzcC5pbnQt eDMubGV0c2VuY3J5cHQub3JnMC8GCCsGAQUFBzAChiNodHRwOi8vY2VydC5pbnQt eDMubGV0c2VuY3J5cHQub3JnLzAtBgNVHREEJjAkghJ3d3cueXVzaGlrYWkuY28u dWuCDnl1c2hpa2FpLmNvLnVrMEwGA1UdIARFMEMwCAYGZ4EMAQIBMDcGCysGAQQB gt8TAQEBMCgwJgYIKwYBBQUHAgEWGmh0dHA6Ly9jcHMubGV0c2VuY3J5cHQub3Jn MIIBAgYKKwYBBAHWeQIEAgSB8wSB8ADuAHUAb1N2rDHwMRnYmQCkURX/dxUcEdkC wQApBo2yCJo32RMAAAFrv/6JkwAABAMARjBEAiAMPteU6fprOOMV0n0/JL2uni0O /w+m0ePIei58xKG6LAIgC4VmJwclEq5RmLyd9RFkfOP4Ieb+Qte7l659INHUxqgA dQApPFGWVMg5ZbqqUPxYB9S3b79Yeily3KTDDPTlRUf0eAAAAWu//olZAAAEAwBG MEQCIGkiIlFN+YtVjLHFoSLSxuoVZw0w5BnHItYfzdcIcZjSAiB/fM76dEg4GZAM eTVor6vuNomers+4euCxv04ydfvvvzANBgkqhkiG9w0BAQsFAAOCAQEAelZ25Zwv VRdXKTxHQcVe0N+LpcRklWZSrO7E45QhNNoNGZ51oijANq/HIH6Y1hVJIs/Vkknd 44gp0bwc6s7cOkTGZZ4QxUhm++O3n1MRk+ljFWxiULYazzCU5DELfUXMXixSGE8q MMIXzknCCh2nGRUptE96SCblVX7UH4kLmhEgzOFFq2/EjNwjIUe7KCN751bkeP72 2g9tngeKYk/LQ+Lbg+1A42018oRgpI0M+HJbzr8rJozdYXBdB0HBjbR/c7PyCOq4 ILMXcp0VnbX2P7dhtJPo1g98a5RVrVuIa2Q83m3+K5oGiGuAGBfttjJljD6h4zC9 rHakmOWY/XyHBg== -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAxxmu1EmIgcjwnQzs/6Ot nfI32h7UQkmXnoaJhlvt+bpPiglbT0ZnBpX/7IDWfKEKsTv+RLdYMIlBXM9j9+Ye WikT7RekyBeMjxOYuCr6QBK5e0zChMiG8+Zq/3pxlCfTVmqLbmP4i+H7hDzC5ID+ EF/kq6h9Xqo1jJ7Ny3Z0sH9Dm+Md1x7y3GDlUpZu4qA2X+2K/ifnxIw/FiORsaWW PlKSVCnFmLTPUZcyZoFgLKx9vlHGL9QPyUSwJz6D5bZCPLSNsGfjiHFJalKqACl9 GG2VgKTRgPWSUJW7UGWBD4kcL2XN76FUOiJNs1B5B6AbPhcVcHrk9R1SW//+bXbS iom66hL7MyFiUpF5sLBIg+d20zEQ1L9aKhDPGOh/adJjuPJPvJpN1t8V0/lF/LKw vIjtDiIz2uNGmJfBFqVq/IwHhq/F4wRB1AVHzg/jbngvTU3gtJcTnksMj9iyc8UV JcOj01qxfp4tBS288780dMuK1Oil9j4Qa/wClgIO1FmBdR6ONiEpuV0R6b35zZPP wGJZO+B3v5wA0Np/kb6vDbmK0sik/5haZw/uGE2fHxTitUKZs0T4+yOQLzHUbUvW 99pUdq9c8R27ArJ3lcgZwuoX0wryefChVCggowSQdHA0fvLFnUanx4Ok9CAyPxW6 O210FnjsFjuXF+CTTzNCml0CAwEAAQ== -----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 275036319803893212628458182015237304703922 . . . . . . . . [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 2019-07-05 01:37:37 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-10-03 01:37:37 +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 812258455472526924558959832979498930530093882791378751850773603361651819660072763205424610278709862399028449553818223875353674204092605507785169526517392194799770833935235185271585491084753381941969735741603585759012450593757434189110220047879666501852861608022415500551738631581724419303751617949015769155170123603159115851614150272894305047129444905513699970492751546423685388484729179056851645271867832774137911844649695150884023008969707497781756577325229245230489089316770326240919416183802899552810351387253672783230314565698943746449264952000177864945599442410358693003172671302259056061906507597971224247923488480863656301112896320302036360542524195536113839555822990023205788867313032236842244820166105728075720124553916867883007929568339514869609133820941328018155505259843152748875215352595748450789987843287652784124608366774667256458463346440433910658176409645591258479541289112163808276694229791644290682415836217708530647115184339095820012532982589040682702661626976016390379507272069855190893392670751388595309322385538698584313173949454814992328838317103071536436172765775139739105602819373986239622167807447138256953590584360984600827498437040639237571152378703186006734332929394089990257134155036891657996261825117 . . . . . . . . . . . . . . . . . . . . [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) f0c5c4dc0df89761f0ed1647119fa61bf0964a3c . . . . . . . . . . . . . . . . [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 (243 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (240 bytes) 00ee0075006f5376ac31f03119d89900a45115ff77151c11d902c10029068db2089a37d9130000016bbffe8993000004030046304402200c3ed794e9fa6b38e315d27d3f24bdae9e2d0eff0fa6d1e3c87a2e7cc4a1ba2c02200b856627072512ae5198bc9df511647ce3f821e6fe42d7bb97ae7d20d1d4c6a8007500293c519654c83965baaa50fc5807d4b76fbf587a2972dca4c30cf4e54547f4780000016bbffe895900000403004630440220692222514df98b558cb1c5a122d2c6ea15670d30e419c722d61fcdd7087198d202207f7ccefa74483819900c793568afabee36899eaecfb87ae0b1bf4e3275fbefbf . . . . [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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