www.precena.co.jp
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:64:4c:5f:51:5f:63:79:0b:a7:b6:77:7b:67:f1:e2:f8:90 was issued on by Let's Encrypt.
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=www.precena.co.jp
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 03:64:4c:5f:51:5f:63:79:0b:a7:b6:77:7b:67:f1:e2:f8:90Serial Number (int): 295466610733688439386851247612754405816464
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: f6:09:ae:c1:1c:c1:27:a7:21:ff:8b:75:bb:cd:72:54:98:5a:24:87
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): bf:29:ba:d0:bc:e7:44:2c:d3:8b:d8:8d:be:8a:f3:7b:fb:6e:d4:d9
Fingerprint (sha256): 7a:8d:f6:c0:fa:79:98:54:1b:b2:a9:3c:e8:ad:80:7c:c2:c1:ce:f5:d8:1c:bc:47:7d:dd:10:58:21:5f:9b:3d
Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/
Revocation information
OCSP Server: http://ocsp.int-x3.letsencrypt.orgCheck the revocation status for certificate www.precena.co.jp
1
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for www.precena.co.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
www.precena.co.jp
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academy.precena.co.jp
*.precena.co.jp
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link.breaking7.com
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nenga2020.junni.co.jp
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yunabe.jp
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Certificate
The complete raw certificate details for www.precena.co.jp in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIFWjCCBEKgAwIBAgISA2RMX1FfY3kLp7Z3e2fx4viQMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xOTEwMjEwNTMxNTlaFw0y MDAxMTkwNTMxNTlaMBwxGjAYBgNVBAMTEXd3dy5wcmVjZW5hLmNvLmpwMIIBIjAN BgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAzzgVCfDTVjRq7KF838fl5Gzqcs1T UbdD5K4Co34oz5geKgsxJfX6u90ZB7vLlqrlsXRY+DZL5tMAP3mCk4qiLNxctAKK S2ZTqi2L+uq07N/IaVYynPdfKHrblmWYP6k6dCuV8xJZJEGP31rC1kidezoYBJ2f R4Ge8Zl3XjwgmsgvjquXBPWLmJaHO7efLAA3MViC1ieKDDfqyb9sT579LND4Kwh0 oot64G4cyokl99twhdXr77a6vjBo2zkCJ66BCJYGCgjyKNFtr5XdiBHWRTWqt6HP likwzVQBCnPT6ta9UTV4VzOpyt+1xmx/V1Y5y9kO8FUeWBmxURz1lICSvwIDAQAB o4ICZjCCAmIwDgYDVR0PAQH/BAQDAgWgMB0GA1UdJQQWMBQGCCsGAQUFBwMBBggr BgEFBQcDAjAMBgNVHRMBAf8EAjAAMB0GA1UdDgQWBBT2Ca7BHMEnpyH/i3W7zXJU mFokhzAfBgNVHSMEGDAWgBSoSmpjBH3duubRObemRWXv86jsoTBvBggrBgEFBQcB AQRjMGEwLgYIKwYBBQUHMAGGImh0dHA6Ly9vY3NwLmludC14My5sZXRzZW5jcnlw dC5vcmcwLwYIKwYBBQUHMAKGI2h0dHA6Ly9jZXJ0LmludC14My5sZXRzZW5jcnlw dC5vcmcvMBwGA1UdEQQVMBOCEXd3dy5wcmVjZW5hLmNvLmpwMEwGA1UdIARFMEMw CAYGZ4EMAQIBMDcGCysGAQQBgt8TAQEBMCgwJgYIKwYBBQUHAgEWGmh0dHA6Ly9j cHMubGV0c2VuY3J5cHQub3JnMIIBBAYKKwYBBAHWeQIEAgSB9QSB8gDwAHYAsh4F zIuizYogTodm+Su5iiUgZ2va+nDnsklTLe+LkF4AAAFt7QPpogAABAMARzBFAiEA s002QGt9npZQOVYpVQRr0csxXTbsrWvsHcJy8Cb7FYMCIAfpsER/cnomH0HYZEBJ bCbw9Y6Imy8x5yiQieHhCAOfAHYAb1N2rDHwMRnYmQCkURX/dxUcEdkCwQApBo2y CJo32RMAAAFt7QPp1gAABAMARzBFAiEA4tE1JOd5pdmND7BWgg87FZSrw5L1sg8g 9mMuf9GPsg8CIGmbnjIZVWZmdEwG3rEWWDTRlDBy7Y72h346A3R2HPMaMA0GCSqG SIb3DQEBCwUAA4IBAQBRXRhLcxu7mUc3ha3xAUNMtpssPdcTf0E46Yg7dzwRrqP7 aFHUWp78i/4jkX0B1dtSoQ7bOyJbnBsoFUidhDEQvfKSdSt+l+TQezDuYsVWMHAP SoTp0pajfXPOEByXxeNRXkrb9Umx42u3n4MNJnJ8oiqBozoWqeyiRcwq0bfBraWM FORNvbFjx6BjpnlYNcgTmJqLUwUoDHiRAp6pPGyD3jNNbmEdm4k4ixOiR/c+V63X cbN4mmvCQNOGj5Rcf60gPVMb8nCQLPM+FAvzCsp40wUxww+IrGMCXXlxjRpKn7ri Qi64l1riyEBs+eNrXMoi56wLvlhhnxhmHnJK1cLA -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAzzgVCfDTVjRq7KF838fl 5Gzqcs1TUbdD5K4Co34oz5geKgsxJfX6u90ZB7vLlqrlsXRY+DZL5tMAP3mCk4qi LNxctAKKS2ZTqi2L+uq07N/IaVYynPdfKHrblmWYP6k6dCuV8xJZJEGP31rC1kid ezoYBJ2fR4Ge8Zl3XjwgmsgvjquXBPWLmJaHO7efLAA3MViC1ieKDDfqyb9sT579 LND4Kwh0oot64G4cyokl99twhdXr77a6vjBo2zkCJ66BCJYGCgjyKNFtr5XdiBHW RTWqt6HPlikwzVQBCnPT6ta9UTV4VzOpyt+1xmx/V1Y5y9kO8FUeWBmxURz1lICS vwIDAQAB -----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 295466610733688439386851247612754405816464 . . . . . . . . [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 2019-10-21 05:31:59 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-01-19 05:31:59 +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 'www.precena.co.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 26158984283100352042739162887642984795108721820886209460809214282951326183033496376104411686146560129006889631235203914561065792656456099399159460790738097786734548096614702198525463123934553907145278706298845304100713949305612122334024604229102109196716998761046756990521484979657808493616805953429959557869958950114206015730414286798215560816425222752020650193347989001233103099386881132316460286495127723847491786788092114229259857958396822445153113965704454856615648150007097728394484798384292826514439538070361165645128022557611027724756947140470630904224509917498443496808490277438928569651936339234234130535103 . . . . . . . . . . . . . . . . . . . . [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) f609aec11cc127a721ff8b75bbcd7254985a2487 . . . . . . . . . . . . . . . . [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 (21 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.precena.co.jp' . . . . . . . . . . . . . . . . [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) 00f0007600b21e05cc8ba2cd8a204e8766f92bb98a2520676bdafa70e7b249532def8b905e0000016ded03e9a20000040300473045022100b34d36406b7d9e965039562955046bd1cb315d36ecad6bec1dc272f026fb1583022007e9b0447f727a261f41d86440496c26f0f58e889b2f31e7289089e1e108039f0076006f5376ac31f03119d89900a45115ff77151c11d902c10029068db2089a37d9130000016ded03e9d60000040300473045022100e2d13524e779a5d98d0fb056820f3b1594abc392f5b20f20f6632e7fd18fb20f0220699b9e3219556666744c06deb1165834d1943072ed8ef6877e3a0374761cf31a . . . . [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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