wktk.jp
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:72:71:68:9e:ad:71:3a:fc:56:a4:28:fa:6c:b0:8d:19:8d was issued on by Let's Encrypt.
With 4 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=wktk.jp
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 03:72:71:68:9e:ad:71:3a:fc:56:a4:28:fa:6c:b0:8d:19:8dSerial Number (int): 300279793605026940497781510806111949494669
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: fa:9c:da:b9:89:ba:45:a5:ff:12:7e:be:91:d1:3a:59:7a:67:e5:48
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): 73:6b:aa:f8:12:c0:8a:04:0a:56:4a:75:84:78:02:32:aa:56:21:1a
Fingerprint (sha256): 3f:a8:71:50:b5:58:d3:b7:7f:13:82:4b:f7:31:36:f2:70:45:61:be:f9:bd:99:4b:31:93:42:2a:2f:d4:d9:c3
Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/
Revocation information
OCSP Server: http://ocsp.int-x3.letsencrypt.orgCheck the revocation status for certificate wktk.jp
4
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for wktk.jp
Public Key Algorithm
RSA
Key Size
2048
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
*.wktk.jp
*.wktk.org
wktk.jp
wktk.org
*.wktk.org
wktk.jp
wktk.org
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wktk.jp
Certificate
The complete raw certificate details for wktk.jp in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIFaDCCBFCgAwIBAgISA3JxaJ6tcTr8VqQo+mywjRmNMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0yMDAzMTgwNzE4MjJaFw0y MDA2MTYwNzE4MjJaMBIxEDAOBgNVBAMTB3drdGsuanAwggEiMA0GCSqGSIb3DQEB AQUAA4IBDwAwggEKAoIBAQDbJRdeJL6IQj7v2ZEgpBwM4m43vLTQT3aKr4f6p7kg eC62C37rKhKHIofZx25+6QMUOEjC2OX/lRz9eJXABvjf+qABwuPzWMEC/+bWNuJ1 zBdN5GRLjTZRQUJVKcR+woDyC4weuOBePQ7DnixsfmImuNJmqyFS60nINFO6JKwG l7LcdaBu8/T93H2kjiih8YG5Z8X9GvrEeWcus8IPdSepf+Xo6+IrmuCwftqBfmUG l5q2Kk+AnwUjczbmCDXOc39XUy5xdRUhQHUaTGaexZdmnCNPhpEMLwGg54O1K8zr yOdFKwTrf46A5khlQhZkN+g1WXJw0uRvVVthIK8SPOGhAgMBAAGjggJ+MIICejAO BgNVHQ8BAf8EBAMCBaAwHQYDVR0lBBYwFAYIKwYBBQUHAwEGCCsGAQUFBwMCMAwG A1UdEwEB/wQCMAAwHQYDVR0OBBYEFPqc2rmJukWl/xJ+vpHROll6Z+VIMB8GA1Ud IwQYMBaAFKhKamMEfd265tE5t6ZFZe/zqOyhMG8GCCsGAQUFBwEBBGMwYTAuBggr BgEFBQcwAYYiaHR0cDovL29jc3AuaW50LXgzLmxldHNlbmNyeXB0Lm9yZzAvBggr BgEFBQcwAoYjaHR0cDovL2NlcnQuaW50LXgzLmxldHNlbmNyeXB0Lm9yZy8wMwYD VR0RBCwwKoIJKi53a3RrLmpwggoqLndrdGsub3Jnggd3a3RrLmpwggh3a3RrLm9y ZzBMBgNVHSAERTBDMAgGBmeBDAECATA3BgsrBgEEAYLfEwEBATAoMCYGCCsGAQUF BwIBFhpodHRwOi8vY3BzLmxldHNlbmNyeXB0Lm9yZzCCAQUGCisGAQQB1nkCBAIE gfYEgfMA8QB3AG9Tdqwx8DEZ2JkApFEV/3cVHBHZAsEAKQaNsgiaN9kTAAABcOy4 3LAAAAQDAEgwRgIhAP48jPwuzHqMZJrGKIjgJi1VlGBxseC4Mlb+y6m5kjjmAiEA 3OBc1jMsvwgyNyKvq9j7Y6DhLy2bzdg/UrQ5G+amZaMAdgAHt1wb5X1o//Gwxh0j Fce65ld8V5S3au68YToaadOiHAAAAXDsuNy3AAAEAwBHMEUCIQCrUC/qqM26K1OQ NMNGlR1IT+kxzMHZ/QNvMrynLDsUVgIgfAg9wSRqjyCxau9iA0ygKfKr4YZOKn7M uJH58rapF7owDQYJKoZIhvcNAQELBQADggEBAIX9Lz9iR01whtRZf8Gl5cWTwC5t FBzi08QC8XP737UQtMfdu/1hljzKmw35dz6qapWrbkDMi85pfiKGz6HQeqZH+GYF f0oOrYQdU7O/mVNKBCThVQgHOGzp5rFEzv4PDk/Tu7Clf2Xbq1+clk7sSNCzihqn rqAUrmmT2W3LbwI72oZaMTnDmbKKBILi7AW3zE8d6bqBaPXl5DsgS//ymnxC6tMB xWzRuvrTnJDqZ/5MoUoU97c7N/RB1TsQhMbP6L4L9l5qEg4g9KvxdQWNVN1uBISr AT+I8dzRtVOlCXiogjYw2GMZ7wiBd1XGIBkX+orMyvW5kpQC82xk28KM7uU= -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA2yUXXiS+iEI+79mRIKQc DOJuN7y00E92iq+H+qe5IHgutgt+6yoShyKH2cdufukDFDhIwtjl/5Uc/XiVwAb4 3/qgAcLj81jBAv/m1jbidcwXTeRkS402UUFCVSnEfsKA8guMHrjgXj0Ow54sbH5i JrjSZqshUutJyDRTuiSsBpey3HWgbvP0/dx9pI4oofGBuWfF/Rr6xHlnLrPCD3Un qX/l6OviK5rgsH7agX5lBpeatipPgJ8FI3M25gg1znN/V1MucXUVIUB1GkxmnsWX ZpwjT4aRDC8BoOeDtSvM68jnRSsE63+OgOZIZUIWZDfoNVlycNLkb1VbYSCvEjzh oQIDAQAB -----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 300279793605026940497781510806111949494669 . . . . . . . . [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 2020-03-18 07:18:22 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-06-16 07:18:22 +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 'wktk.jp' . . . . . . . . [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 (2160 bits) . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 27664479179558396233746289120345804620950329445918641013180878328011933985696519952215204508385715520324135792074823382098053293162878692817565127107763161468961266178990115539562398221752737221671002188613648544946329173623458376184327259959310052030073493963490214753034425834772642284984736019765200716257472772685169313368432351163363040195744390941921634934563697790397623832068616715157609505577478340387786457921323571942307444767399495584373034217370525144477713478670897864239194171534188632542986829667391406024400089814357653060235529461173797889086299369821535893931608409957377709671404730434765446767009 . . . . . . . . . . . . . . . . . . . . [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) fa9cdab989ba45a5ff127ebe91d13a597a67e548 . . . . . . . . . . . . . . . . [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 (44 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String '*.wktk.jp' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String '*.wktk.org' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'wktk.jp' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'wktk.org' . . . . . . . . . . . . . . . . [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) 00f10077006f5376ac31f03119d89900a45115ff77151c11d902c10029068db2089a37d91300000170ecb8dcb00000040300483046022100fe3c8cfc2ecc7a8c649ac62888e0262d55946071b1e0b83256fecba9b99238e6022100dce05cd6332cbf08323722afabd8fb63a0e12f2d9bcdd83f52b4391be6a665a300760007b75c1be57d68fff1b0c61d2315c7bae6577c5794b76aeebc613a1a69d3a21c00000170ecb8dcb70000040300473045022100ab502feaa8cdba2b539034c346951d484fe931ccc1d9fd036f32bca72c3b145602207c083dc1246a8f20b16aef62034ca029f2abe1864e2a7eccb891f9f2b6a917ba . . . . [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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