yushikai.co.uk
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:17:59:6f:ac:69:c5:e2:25:ba:a6:07:cc:af:6c:53:f4:ad 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): 03:17:59:6f:ac:69:c5:e2:25:ba:a6:07:cc:af:6c:53:f4:adSerial Number (int): 269282233367993130312510244462843542107309
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: 76:9b:02:58:7c:cb:09:ab:05:1e:35:c1:01:bd:4a:30:24:4e:5c:48
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): 03:74:a7:98:5b:2a:6b:38:42:5f:bc:53:17:d5:ff:98:c3:44:ae:bb
Fingerprint (sha256): 35:c4:f1:b1:2c:0c:14:a7:9c:de:5b:8d:6b:86:41:38:20:2c:f1:15:56:1e:ae:14:4f:17:1b:d8:0d:aa:e2:bf
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
Certificate
The complete raw certificate details for yushikai.co.uk in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIGaDCCBVCgAwIBAgISAxdZb6xpxeIluqYHzK9sU/StMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xODEyMTYwMjUwMThaFw0x OTAzMTYwMjUwMThaMBkxFzAVBgNVBAMTDnl1c2hpa2FpLmNvLnVrMIICIjANBgkq hkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAtm4zmzQR+GqhHOiy+O8pX6CSuePreND5 HsvhdC1AS+KmoYbmmQvpZVrOA0EM2lMUQRs6lu4d4y9PN815KO3wTSkRrnJP8cZz tKkksR08MXXUR/rJsOFFSmDjMVXSSqenjnEf3ZauaNYvmIk2apNa3c2ALG8IGW4e bi+VSnmijC3/fF7VfQePIagYINd79U7nDqKW7MNqffvNnyTUJLFTt5GTULuphz7d iNn7A8T3YMSFU1h1P7pvO6yAXUVQ/InSXtKsu68LgdI45N9E07M+NZ+T0RMMdgYT AdpKSQBe1dE5vy0Hn2tc91L1VRveA4M3TI0DBplJXSYn//0NxUAqgPTwpt9uVQ99 +s+sVkrMx7Kkjmmu/MtJE+1lnMV22cY/4etSciS78MDG2B+dK0eb/8rCra+rCM5W zOhgn9+nEvVzcDIkLqq6dUpm6367MnoHb6qjUNmQW/SeYNeZ7EPXkmkKtbQDapDA RK/52nxj1Vno0vn56/G93n1aGb0Sq+li2VoGSWctmEo9iOfcf2FsKNej2msYmM/i pBqm2Sh8JTo4cLPZNjPw5xbpV//Gk59rDSrjIiGYma1Gg03oFUyl+Tv9aRuZjxL2 kcpmjsmniHSFWtYj7e7+3SrhWsgJ+UNOdfiucMzpXWl+PHqJjwSx62Xxw61OCAWQ VXSTGcajlg8CAwEAAaOCAncwggJzMA4GA1UdDwEB/wQEAwIFoDAdBgNVHSUEFjAU BggrBgEFBQcDAQYIKwYBBQUHAwIwDAYDVR0TAQH/BAIwADAdBgNVHQ4EFgQUdpsC WHzLCasFHjXBAb1KMCROXEgwHwYDVR0jBBgwFoAUqEpqYwR93brm0Tm3pkVl7/Oo 7KEwbwYIKwYBBQUHAQEEYzBhMC4GCCsGAQUFBzABhiJodHRwOi8vb2NzcC5pbnQt eDMubGV0c2VuY3J5cHQub3JnMC8GCCsGAQUFBzAChiNodHRwOi8vY2VydC5pbnQt eDMubGV0c2VuY3J5cHQub3JnLzAtBgNVHREEJjAkghJ3d3cueXVzaGlrYWkuY28u dWuCDnl1c2hpa2FpLmNvLnVrMEwGA1UdIARFMEMwCAYGZ4EMAQIBMDcGCysGAQQB gt8TAQEBMCgwJgYIKwYBBQUHAgEWGmh0dHA6Ly9jcHMubGV0c2VuY3J5cHQub3Jn MIIBBAYKKwYBBAHWeQIEAgSB9QSB8gDwAHYAdH7agzGtMxCRIZzOJU9CcMK//V5C IAjGNzV55hB7zFYAAAFntSLVRAAABAMARzBFAiEA+X/c4sd9T99isurijxKevaH9 eIVn+YPBNu6ltxXQe50CIFYxV7R631ry6spaWI2BYVCuQZyKFy/NBDu7BN1HDAEG AHYAY/Lbzeg7zCzPC3KEJ1drM6SNYXePvXWmOLHHaFRL2I0AAAFntSLVqAAABAMA RzBFAiB8RE/m88LstDGQcmCRSOZShKQDMFTwvFGVhcfsIn2V7QIhAJVH3AKm/d2B e6PtVJ+Cfinffqig2dAzo7bYfCXRhMWOMA0GCSqGSIb3DQEBCwUAA4IBAQAwYYYY ACkoUBpoHzT+0452RJPebjfZRlEubtU5N7hXpVijtVWtwdqmN5WaNs4xc0U7X/mo RNyRLbwVx7upMQ1itnRMvZmLHsrkM9bI2tHmEjDYQAQcQnOPwahEJLvIlH8f9y6/ kl0k3qCLrAE4b08MxIKJTw/Vmbvvx6NtBxRpU6aj589Md0DaxDPM5cHIJjM3tCNO 8DXxmccOt+b5xKs6UX56/2eUgwmB5XrjBg/03biSs98C3oACj3RncuPMjxXYBMLE QYwq8ER7v7Y8sNRsyvAgtm07ntsAYL5T61JSZdSMcOzjY/v0rWR4H6ytbFToXekP fP1IcknHgbMzwuMg -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAtm4zmzQR+GqhHOiy+O8p X6CSuePreND5HsvhdC1AS+KmoYbmmQvpZVrOA0EM2lMUQRs6lu4d4y9PN815KO3w TSkRrnJP8cZztKkksR08MXXUR/rJsOFFSmDjMVXSSqenjnEf3ZauaNYvmIk2apNa 3c2ALG8IGW4ebi+VSnmijC3/fF7VfQePIagYINd79U7nDqKW7MNqffvNnyTUJLFT t5GTULuphz7diNn7A8T3YMSFU1h1P7pvO6yAXUVQ/InSXtKsu68LgdI45N9E07M+ NZ+T0RMMdgYTAdpKSQBe1dE5vy0Hn2tc91L1VRveA4M3TI0DBplJXSYn//0NxUAq gPTwpt9uVQ99+s+sVkrMx7Kkjmmu/MtJE+1lnMV22cY/4etSciS78MDG2B+dK0eb /8rCra+rCM5WzOhgn9+nEvVzcDIkLqq6dUpm6367MnoHb6qjUNmQW/SeYNeZ7EPX kmkKtbQDapDARK/52nxj1Vno0vn56/G93n1aGb0Sq+li2VoGSWctmEo9iOfcf2Fs KNej2msYmM/ipBqm2Sh8JTo4cLPZNjPw5xbpV//Gk59rDSrjIiGYma1Gg03oFUyl +Tv9aRuZjxL2kcpmjsmniHSFWtYj7e7+3SrhWsgJ+UNOdfiucMzpXWl+PHqJjwSx 62Xxw61OCAWQVXSTGcajlg8CAwEAAQ== -----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 269282233367993130312510244462843542107309 . . . . . . . . [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 2018-12-16 02:50:18 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-03-16 02:50:18 +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 744251404952131710110045418278964052848206488700288272693831701529040731978323022426903775767788275335763932540138245393998044149094704803576380914778504223538839181427301219806339254914831515096852874563091492996520367103008580326599226555092034224478957652464339217782947809058867265745462084037968706837372901388997629570511794208614675344231868208122435449063344107731610936080851405718698828853988015218293875569789868111869129350022581386253947369650901176895019565272677553738479733837763925499292935900339356772655907044981919390480050043272651140469287044347829742291256444255728217055935491136540313461697882985526654292236783378567456406002939214301147046064513941942024584135936747457927793429486928708994519584461417840287399881026140249306011601855135588198612350345220647987677824320131090574703465614764947908863551318099741947199959366188921483548099994317870755162153242287026307430296623939682054172346752845602223591258912312482004361197131007258277955742865198942711251172776682068249635524360857661039122981549227089397531764679037178710101316725117838946738962165105273074500871218170602920814415335639496683150124501305425814492239831191887035009293802159816358070729478498217957712332088534927401193402766863 . . . . . . . . . . . . . . . . . . . . [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) 769b02587ccb09ab051e35c101bd4a30244e5c48 . . . . . . . . . . . . . . . . [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 (245 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (242 bytes) 00f0007600747eda8331ad331091219cce254f4270c2bffd5e422008c6373579e6107bcc5600000167b522d5440000040300473045022100f97fdce2c77d4fdf62b2eae28f129ebda1fd788567f983c136eea5b715d07b9d0220563157b47adf5af2eaca5a588d816150ae419c8a172fcd043bbb04dd470c010600760063f2dbcde83bcc2ccf0b728427576b33a48d61778fbd75a638b1c768544bd88d00000167b522d5a8000004030047304502207c444fe6f3c2ecb4319072609148e65284a4033054f0bc519585c7ec227d95ed0221009547dc02a6fddd817ba3ed549f827e29df7ea8a0d9d033a3b6d87c25d184c58e . . . . [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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