yushikai.co.uk
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:e0:a2:b9:12:50:97:b0:14:4f:9c:1e:f3:7e:07:83:1b:09 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:e0:a2:b9:12:50:97:b0:14:4f:9c:1e:f3:7e:07:83:1b:09Serial Number (int): 337776403867275512040403667512404411095817
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: ec:32:e1:dd:e6:17:66:22:90:2c:71:3d:f5:f6:74:aa:e9:0f:d4:fc
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): ec:9b:d7:9b:f5:ce:d5:58:1e:31:15:c3:70:85:68:98:c2:d3:0e:1c
Fingerprint (sha256): 23:b7:7c:7f:dd:a5:54:2b:89:b7:e0:12:6a:38:ab:fe:d6:ff:65:33:2c:c9:7b:8d:0c:4a:7f:15:8d:f4:18:7f
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
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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----- MIIGaTCCBVGgAwIBAgISA+CiuRJQl7AUT5we834HgxsJMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xODEyMTMwMjQ5MDFaFw0x OTAzMTMwMjQ5MDFaMBkxFzAVBgNVBAMTDnl1c2hpa2FpLmNvLnVrMIICIjANBgkq hkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAvasG1+ZafqCSY4M0DOR1Vkm5qWrZXibv 2hBrtBa0OahAQZmR+LnLiREpAcCTKoTuz1wwHbo33h+abOSoWxyKebXVPs3ZZSgn hLh9Zyv4F/pPF0zZ5BowecIwtTNr/A2oQjBMUua886le8Du1G/tqrFyJoxR0tnIk T9IvsSz5eyni0001250h/u1gtX8CCDcEeyPQAGPrOReHNr5dNZTAHEzuQ2AeOlyr d4io+/DzZPnO47wmAonXP9J3SnNNpfAh8gBXyYkRpd/LV8WwhLt3wdjrz3pMf8yl fQZ5ota4Mc+eiAbP45Zx3DamJsR1kDAO000eAFnW+KTE4SOKo9Tu9rLcUO4h4BwW IybC4d/dKwxQSPoZemG7AkIbzzp/DpWS4IPBq7r1KtHMGESojJMhAAmdA6w9kA44 CFUoKletDJikbhIihOXddwYjZT5HUkHqsd/uMvaDx7QHOg7AVS5R3rzjYok5OZwS IQ4HygEjOvMWlSMm+5dnhJ+lBzoDyur2+X7RkPV3UGk6FDc3Aslp6Qayt8jnZGob M6rAzrPfZQGoICMz3mSBToUYnPFAGk9X2T+hwNrW4WKefrKhNagat4KKGbURFOWe SUV1A9B8Y1bQKyhKTgchYAXstWcTKxJp8sO5m+of8AhvYM5zBk6SfYwa03HjRe0r gXGUGaz+HyMCAwEAAaOCAngwggJ0MA4GA1UdDwEB/wQEAwIFoDAdBgNVHSUEFjAU BggrBgEFBQcDAQYIKwYBBQUHAwIwDAYDVR0TAQH/BAIwADAdBgNVHQ4EFgQU7DLh 3eYXZiKQLHE99fZ0qukP1PwwHwYDVR0jBBgwFoAUqEpqYwR93brm0Tm3pkVl7/Oo 7KEwbwYIKwYBBQUHAQEEYzBhMC4GCCsGAQUFBzABhiJodHRwOi8vb2NzcC5pbnQt eDMubGV0c2VuY3J5cHQub3JnMC8GCCsGAQUFBzAChiNodHRwOi8vY2VydC5pbnQt eDMubGV0c2VuY3J5cHQub3JnLzAtBgNVHREEJjAkghJ3d3cueXVzaGlrYWkuY28u dWuCDnl1c2hpa2FpLmNvLnVrMEwGA1UdIARFMEMwCAYGZ4EMAQIBMDcGCysGAQQB gt8TAQEBMCgwJgYIKwYBBQUHAgEWGmh0dHA6Ly9jcHMubGV0c2VuY3J5cHQub3Jn MIIBBQYKKwYBBAHWeQIEAgSB9gSB8wDxAHYA4mlLribo6UAJ6IYbtjuD1D7n/nSI +6SPKJMBnd3x2/4AAAFnpa6UzQAABAMARzBFAiEAzXAmc5TgCO9U8NC9PcMrassE PbYMvZHMOyTN2k6QbxICIGRUnOH3jZUAKb9DbUre3fzFo/QyRVvZCZCdxqwFnQqp AHcAKTxRllTIOWW6qlD8WAfUt2+/WHopctykwwz05UVH9HgAAAFnpa6UjgAABAMA SDBGAiEAwXsDvhSSBxw/PazjInRpX1Roo2FfD+BJFAcRBzz6dwICIQCupndjWWWU 9XRh6r7W0tgWiQYpmsar9r3Z0Giskt6GvjANBgkqhkiG9w0BAQsFAAOCAQEAWtfG a2xsIiQlIcCb+Tt/Se/0nSfTjZoXML7TJNkf0yQF2qwEy4UpG7Ycj5kUCnVijpYm sz8M7y4YvnhBnkyeIcbqWNXl42Peko8zBW2/EZVMsW60nYQS/9yUm7RUF/Bq3ICg OfqgO61VePNSFfb3RMrBUyPz1hVCtVxYRIOvwakXsF0reXmyiCLNxc95z4pmNW17 MHg0xYbQzgDoW3WwQHF+AoNz864gkuDU/D2V7Z/nK40PlYHgps7rWTFJvxWBHlcw xO0kfnd8JgzUiW5r1sdVS4dRn+UsSNQnWDSiIAoPfq+9fDcTMSuoe3Lx9yTWEOkZ /i3yuGt6hwI5a4e1IA== -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAvasG1+ZafqCSY4M0DOR1 Vkm5qWrZXibv2hBrtBa0OahAQZmR+LnLiREpAcCTKoTuz1wwHbo33h+abOSoWxyK ebXVPs3ZZSgnhLh9Zyv4F/pPF0zZ5BowecIwtTNr/A2oQjBMUua886le8Du1G/tq rFyJoxR0tnIkT9IvsSz5eyni0001250h/u1gtX8CCDcEeyPQAGPrOReHNr5dNZTA HEzuQ2AeOlyrd4io+/DzZPnO47wmAonXP9J3SnNNpfAh8gBXyYkRpd/LV8WwhLt3 wdjrz3pMf8ylfQZ5ota4Mc+eiAbP45Zx3DamJsR1kDAO000eAFnW+KTE4SOKo9Tu 9rLcUO4h4BwWIybC4d/dKwxQSPoZemG7AkIbzzp/DpWS4IPBq7r1KtHMGESojJMh AAmdA6w9kA44CFUoKletDJikbhIihOXddwYjZT5HUkHqsd/uMvaDx7QHOg7AVS5R 3rzjYok5OZwSIQ4HygEjOvMWlSMm+5dnhJ+lBzoDyur2+X7RkPV3UGk6FDc3Aslp 6Qayt8jnZGobM6rAzrPfZQGoICMz3mSBToUYnPFAGk9X2T+hwNrW4WKefrKhNaga t4KKGbURFOWeSUV1A9B8Y1bQKyhKTgchYAXstWcTKxJp8sO5m+of8AhvYM5zBk6S fYwa03HjRe0rgXGUGaz+HyMCAwEAAQ== -----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 337776403867275512040403667512404411095817 . . . . . . . . [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 2018-12-13 02:49:01 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-03-13 02:49:01 +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 773778229606372139509509413901751914588902314571780982167138649792241894567989042442364107703003950928533372208073900826644086072084703845269425148311404237670786669062321019805396428094278751212537140645471099245502043423867218443629058774394901668144304221568857566264222897447016444290622921631150731157376411989127633424067186429853794488529234808196890542007178569002229191616283642011955574980909436799288680112682142732262042227175997484886548800698277654864767604651754898974885841247945913677945144970561572656177105801259774328921761594892735436423728690482340495641363818655359546608334769679333922877493407938970350210265175842162084580451432757288149863718322254683685833314986428442962138670623374419450165305262929189780312844047327722864577637767310746349809663687218425560808364754541740209862907099058388179212493612248588120773958340118039269359841551243889175613276005193894952566604642230455785745557521870678824818856990532669260118083901509712636362367484689570154517765689984135537552334173740969955202851470933977075745252549767797974429854747023186368593170590805713369003380957577119866222270506258660577601683532342651346984205200203924747859273585719110015169103449697308721685892362796267637504223354659 . . . . . . . . . . . . . . . . . . . . [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) ec32e1dde6176622902c713df5f674aae90fd4fc . . . . . . . . . . . . . . . . [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) 00f1007600e2694bae26e8e94009e8861bb63b83d43ee7fe7488fba48f2893019dddf1dbfe00000167a5ae94cd0000040300473045022100cd70267394e008ef54f0d0bd3dc32b6acb043db60cbd91cc3b24cdda4e906f12022064549ce1f78d950029bf436d4adeddfcc5a3f432455bd909909dc6ac059d0aa9007700293c519654c83965baaa50fc5807d4b76fbf587a2972dca4c30cf4e54547f47800000167a5ae948e0000040300483046022100c17b03be1492071c3f3dace32274695f5468a3615f0fe049140711073cfa7702022100aea67763596594f57461eabed6d2d8168906299ac6abf6bdd9d068ac92de86be . . . . [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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