yushikai.co.uk
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:03:45:58:2a:ed:04:b8:08:a4:55:bc:94:00:3f:44:d7:74 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): 03:03:45:58:2a:ed:04:b8:08:a4:55:bc:94:00:3f:44:d7:74Serial Number (int): 262449879420516003882774771854790277519220
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: 81:54:41:95:19:34:e6:d9:d2:2e:cc:10:03:f6:82:f7:e5:a8:0b:d2
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): 7a:98:28:bf:ec:e2:f8:39:fb:d2:e7:dd:40:5a:68:dc:bb:11:8e:04
Fingerprint (sha256): 5f:cb:ac:b3:d8:65:b2:54:b6:27:50:7c:13:35:c6:4d:5c:5f:6c:e7:59:31:b1:ea:15:25:e8:60:12:08:be:ba
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----- MIIGajCCBVKgAwIBAgISAwNFWCrtBLgIpFW8lAA/RNd0MA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xOTA5MDIwMTQwMzFaFw0x OTEyMDEwMTQwMzFaMBkxFzAVBgNVBAMTDnl1c2hpa2FpLmNvLnVrMIICIjANBgkq hkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAu//8FzUodd7Dn0IOedDkJgzz8x5wpRX/ 3msd3IH7/515NB3ZqN1y/MZVuerNai94XFKm4jvtJQVcE1PSICTO0i2AE3uU4fap NaYC3YPbr7IBNsIqfD6ki4zN1Edjh8Adv1tEE77Axohc+FnqhPGvVVRXlWG71WRy z0LqSpohRTTksP8cw/uR8vKWRozeNzNAZoty+cILQZV/6YLVb+Zx4Ef7f5aAig/j gGkCumhTwM5IhAe56EoLzhcECgkzsuBxMnIpebzb8D85OQsFEUv9UBnAKnD2HEzA Dhpwqxhb6s8pid7E02Np9YdTYjZFmn1Q8TabzHQXyugbd6kF3PyLsAq364ruey44 AH3Kc1/5zMY4fw/oOn/qV8n6NFEw4sNk2aDv4kwrup+iM568I+AEhisFyTANTrE8 JoBic7AH/0ArO/oWc54K8Valn44HfZub+td0iyguzFosbk1tQU/Rab1e+yk1YLpl s4fJFnUAjuNGbmiKCtUphbJI4H2tCwQkx6dNSumjKStDjzanRKEtF12/Fe9E3Kcg adhY7Fr3jjtIEJWZRq+P2exZzL3cklW9GAzWSXj0gjxGYmVmP91tni2aq5JCzm5/ a1E6z9DrP6uUKILU21YwWj2IZ+4ycyPoAeAP8ZVOekUbNgoyPcVLtKDHhY6BMxYs t3IJR0VamhsCAwEAAaOCAnkwggJ1MA4GA1UdDwEB/wQEAwIFoDAdBgNVHSUEFjAU BggrBgEFBQcDAQYIKwYBBQUHAwIwDAYDVR0TAQH/BAIwADAdBgNVHQ4EFgQUgVRB lRk05tnSLswQA/aC9+WoC9IwHwYDVR0jBBgwFoAUqEpqYwR93brm0Tm3pkVl7/Oo 7KEwbwYIKwYBBQUHAQEEYzBhMC4GCCsGAQUFBzABhiJodHRwOi8vb2NzcC5pbnQt eDMubGV0c2VuY3J5cHQub3JnMC8GCCsGAQUFBzAChiNodHRwOi8vY2VydC5pbnQt eDMubGV0c2VuY3J5cHQub3JnLzAtBgNVHREEJjAkghJ3d3cueXVzaGlrYWkuY28u dWuCDnl1c2hpa2FpLmNvLnVrMEwGA1UdIARFMEMwCAYGZ4EMAQIBMDcGCysGAQQB gt8TAQEBMCgwJgYIKwYBBQUHAgEWGmh0dHA6Ly9jcHMubGV0c2VuY3J5cHQub3Jn MIIBBgYKKwYBBAHWeQIEAgSB9wSB9ADyAHcAY/Lbzeg7zCzPC3KEJ1drM6SNYXeP vXWmOLHHaFRL2I0AAAFs79hj8wAABAMASDBGAiEA//8Nfyrg0hF2lfXTSY3JJiw9 wzeGf8piIrFOH8A5DKkCIQCNv5DqOxdrX0640lvJv9tHFGOWS3ulSF2qpL6w0QUv 9gB3AOJpS64m6OlACeiGG7Y7g9Q+5/50iPukjyiTAZ3d8dv+AAABbO/YZcYAAAQD AEgwRgIhAP7uK4ua3Twj1oSJ+x//PT0xgMbaKV0rNg5NYTcS1Jt/AiEA/jhnHSdI w2Iy9jziFwWrET+oL9S4tpOTadgmNLrs5tIwDQYJKoZIhvcNAQELBQADggEBACeJ n6aOFsac86KGu95WIZvWVvz5t2Ig97s/DfOuZF63HY5cKO2tcsBsiCO58QODM4vh Og7XSogkH7Pe8d3iyh05C7uXGLWB3NVdce2Qij6xjgvISLuG4T+ZEBMDJQnhlrsJ NdehaOjf1qjxR0yyBKjz1CD/+jp52faCWr3nwdpHWatNtYCEUxKkYJFh/M4uY7O4 3KTBzMT2IrjsYJ28CSeAQ9r7d9YgvGyAW1pRCPlZvZugI4FmNr8eP30gfRIUicdE anXtd3g/ypYIqAaw54/FXvRcZDpjhh49tgC8U8rLCOSaWBGi51m6jTN3146FusJi F7wVSiX+3/cdWKBI9b0= -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAu//8FzUodd7Dn0IOedDk Jgzz8x5wpRX/3msd3IH7/515NB3ZqN1y/MZVuerNai94XFKm4jvtJQVcE1PSICTO 0i2AE3uU4fapNaYC3YPbr7IBNsIqfD6ki4zN1Edjh8Adv1tEE77Axohc+FnqhPGv VVRXlWG71WRyz0LqSpohRTTksP8cw/uR8vKWRozeNzNAZoty+cILQZV/6YLVb+Zx 4Ef7f5aAig/jgGkCumhTwM5IhAe56EoLzhcECgkzsuBxMnIpebzb8D85OQsFEUv9 UBnAKnD2HEzADhpwqxhb6s8pid7E02Np9YdTYjZFmn1Q8TabzHQXyugbd6kF3PyL sAq364ruey44AH3Kc1/5zMY4fw/oOn/qV8n6NFEw4sNk2aDv4kwrup+iM568I+AE hisFyTANTrE8JoBic7AH/0ArO/oWc54K8Valn44HfZub+td0iyguzFosbk1tQU/R ab1e+yk1YLpls4fJFnUAjuNGbmiKCtUphbJI4H2tCwQkx6dNSumjKStDjzanRKEt F12/Fe9E3KcgadhY7Fr3jjtIEJWZRq+P2exZzL3cklW9GAzWSXj0gjxGYmVmP91t ni2aq5JCzm5/a1E6z9DrP6uUKILU21YwWj2IZ+4ycyPoAeAP8ZVOekUbNgoyPcVL tKDHhY6BMxYst3IJR0VamhsCAwEAAQ== -----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 262449879420516003882774771854790277519220 . . . . . . . . [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 2019-09-02 01:40:31 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-12-01 01:40:31 +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 766972841429375683396831470675003616088244101391685842335242442365529347472013706317388282669954631686226219651191405918094672302942440352906815896395354154735460558915247780451993125395744702201469807669072338022488105854793296943741618274234144715619063382712522109314133886190483541207744558962496267039056250736634018860593639350219755079783327346990461098554725252763795389783951169457770366829692731622411447248062052423852312121646588637700869010616183597495567047855148517945388457881142153396429030566697759580120575226527437230346029944121730676337715904348931396316084588194637601443844734787821402970692947627805119604375470086922425534039608396197759514902073408263954226964400477401415516504950903226598990725375362557070868986466113467646100440064646548784447230744548082424407766610223606078463825212880117959022325733531751581156004813155723983203029312928114137229241643125119106938060818469177446476709446953145745265511970647896037599868720580316388702594305095951394120914299575142253047572027498212141112764817454630797069031061521521468440639521799145335046381889563459028624457736952715096153665270605689775850948997744034840679555215652854618293274800972710247521753994153870483120597680818849544716265626139 . . . . . . . . . . . . . . . . . . . . [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) 815441951934e6d9d22ecc1003f682f7e5a80bd2 . . . . . . . . . . . . . . . . [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 (247 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (244 bytes) 00f200770063f2dbcde83bcc2ccf0b728427576b33a48d61778fbd75a638b1c768544bd88d0000016cefd863f30000040300483046022100ffff0d7f2ae0d2117695f5d3498dc9262c3dc337867fca6222b14e1fc0390ca90221008dbf90ea3b176b5f4eb8d25bc9bfdb471463964b7ba5485daaa4beb0d1052ff6007700e2694bae26e8e94009e8861bb63b83d43ee7fe7488fba48f2893019dddf1dbfe0000016cefd865c60000040300483046022100feee2b8b9add3c23d68489fb1fff3d3d3180c6da295d2b360e4d613712d49b7f022100fe38671d2748c36232f63ce21705ab113fa82fd4b8b6939369d82634baece6d2 . . . . [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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