www.rkobo.jp
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:56:86:40:07:e3:fc:df:01:b3:4c:dd:13:35:4f:69:c9:70 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.rkobo.jp
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 03:56:86:40:07:e3:fc:df:01:b3:4c:dd:13:35:4f:69:c9:70Serial Number (int): 290779590368955492690921573741862605932912
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: 51:ff:54:a7:d6:e9:a0:6e:4f:e6:bb:5c:b0:c5:07:f7:db:ed:83:a1
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): bb:8b:b8:1f:c6:b2:3d:1b:4a:33:f8:c0:d3:44:04:7a:ff:b3:29:3b
Fingerprint (sha256): de:fb:42:2d:1c:bf:0c:8c:e8:4d:b7:cc:3d:88:2d:4d:35:23:90:43:e3:e4:63:65:f8:0c:96:2b:61:f0:42:15
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.rkobo.jp
1
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for www.rkobo.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.rkobo.jp
Other certificates including the domain name rkobo.jp
(limited to 100 certificates)
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rkobo.jp
Certificate
The complete raw certificate details for www.rkobo.jp in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIFUTCCBDmgAwIBAgISA1aGQAfj/N8Bs0zdEzVPaclwMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0yMDAxMDcwNzE1NThaFw0y MDA0MDYwNzE1NThaMBcxFTATBgNVBAMTDHd3dy5ya29iby5qcDCCASIwDQYJKoZI hvcNAQEBBQADggEPADCCAQoCggEBAOcB2zIYTUHpWTq4AS3zsl4aFI0+ZMaXvoBs nHEV244nAdB5vwgqs0g04d2UJlnibvDwg0Q88CLbVoDBniVLO3FpItgPXEIErrYp 9P2grHGNPcTD4HPenXcoplMDOims9MrDTmyTGEEGwvtB3+ag9JY0P31HtMIvh0GZ r+wyF8plqXywSs7iZRoJcB3q+hh6sy8zjds9VwxQxxe+QLdjr04ZH06WMp/6HIqm sqvbv271axedAquPS6iFu4/+dmT8gx8wLVDEw9YRwzvy2Ns8ndCflbVF5biJZFuq HEgkw/jENY2fn5lkLCp7/cg8RSz/mtK3+/2DFUhcwV6aMa4YxFsCAwEAAaOCAmIw ggJeMA4GA1UdDwEB/wQEAwIFoDAdBgNVHSUEFjAUBggrBgEFBQcDAQYIKwYBBQUH AwIwDAYDVR0TAQH/BAIwADAdBgNVHQ4EFgQUUf9Up9bpoG5P5rtcsMUH99vtg6Ew HwYDVR0jBBgwFoAUqEpqYwR93brm0Tm3pkVl7/Oo7KEwbwYIKwYBBQUHAQEEYzBh MC4GCCsGAQUFBzABhiJodHRwOi8vb2NzcC5pbnQteDMubGV0c2VuY3J5cHQub3Jn MC8GCCsGAQUFBzAChiNodHRwOi8vY2VydC5pbnQteDMubGV0c2VuY3J5cHQub3Jn LzAXBgNVHREEEDAOggx3d3cucmtvYm8uanAwTAYDVR0gBEUwQzAIBgZngQwBAgEw NwYLKwYBBAGC3xMBAQEwKDAmBggrBgEFBQcCARYaaHR0cDovL2Nwcy5sZXRzZW5j cnlwdC5vcmcwggEFBgorBgEEAdZ5AgQCBIH2BIHzAPEAdwBep3P531bA57U2SH3Q SeAyepGaDIShEhKEGHWWgXFFWAAAAW9/EyN2AAAEAwBIMEYCIQCv/rNI44dbHaX9 qi17M8zoZ8Q3JbVHQmuvl6/Wo8GesQIhAIZ8L9S3+op2XXzSC8OAnZKMZvhZgNTL 0N27hT1KP9wdAHYAsh4FzIuizYogTodm+Su5iiUgZ2va+nDnsklTLe+LkF4AAAFv fxMjawAABAMARzBFAiEAtR/IiC4waF4yYMr/0KrXbzPUzesz1mgXPXBMl0ORHmAC IHvQcbbziSq1kr+wp8SP/h9BH3RWido3h8NgaiCeoYShMA0GCSqGSIb3DQEBCwUA A4IBAQBYdJtEUjaUhNk7uUKD6wy2CgnWz3dIJuR3V7jX6zNrQdUCTrp9dBA1S6Pz s9gumJKGUGHyZHCPK3ZCXBdNxvWwx7Xo+M2jBp8GAm9ZzMAwmJkbsSGiAayWmI9s vHEsx5xNV2ecmADf4auH+k2VkhVdR33hAuu/je9Ts66tQgZKuXRujMyrSo29Lcn/ XZrcNWIKTGzZ7/BOTXPQfRa28c+a+23CUlk6pALpHrbe3+0ioDiR0tyFAZaUlU94 ZNORH8DEh9VcNk8mqNa96P6OEgjBI3ZJgtFyvQKigJEnZChUJlstGGGgrasqVTQF hghdGZN9lVXZJ+7rZ3WVeaziFC/j -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA5wHbMhhNQelZOrgBLfOy XhoUjT5kxpe+gGyccRXbjicB0Hm/CCqzSDTh3ZQmWeJu8PCDRDzwIttWgMGeJUs7 cWki2A9cQgSutin0/aCscY09xMPgc96ddyimUwM6Kaz0ysNObJMYQQbC+0Hf5qD0 ljQ/fUe0wi+HQZmv7DIXymWpfLBKzuJlGglwHer6GHqzLzON2z1XDFDHF75At2Ov ThkfTpYyn/ociqayq9u/bvVrF50Cq49LqIW7j/52ZPyDHzAtUMTD1hHDO/LY2zyd 0J+VtUXluIlkW6ocSCTD+MQ1jZ+fmWQsKnv9yDxFLP+a0rf7/YMVSFzBXpoxrhjE WwIDAQAB -----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 290779590368955492690921573741862605932912 . . . . . . . . [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 2020-01-07 07:15:58 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-04-06 07:15:58 +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.rkobo.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 29161963789835154839064622945516430415644510384062320414135282155773163193057736979022293771229933061468817667432619000088638550938532344824938534946781382882436650334026505121616519356086159213810986757947489940624513523388475587024610822192706070610350724046936913727497072539256732241137052585437678424778394295298717270387966124393369023542994504238429413671277610243550389471797258115310275893796616367468268143504163277177083672217721356859502203924078821984578680080272278391314978252621464319313308306056433491637330926844416589706929310099570324148384116725720092197312947068690365890314501739829175046947931 . . . . . . . . . . . . . . . . . . . . [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) 51ff54a7d6e9a06e4fe6bb5cb0c507f7dbed83a1 . . . . . . . . . . . . . . . . [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 (16 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.rkobo.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 (246 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (243 bytes) 00f10077005ea773f9df56c0e7b536487dd049e0327a919a0c84a1121284187596817145580000016f7f1323760000040300483046022100affeb348e3875b1da5fdaa2d7b33cce867c43725b547426baf97afd6a3c19eb1022100867c2fd4b7fa8a765d7cd20bc3809d928c66f85980d4cbd0ddbb853d4a3fdc1d007600b21e05cc8ba2cd8a204e8766f92bb98a2520676bdafa70e7b249532def8b905e0000016f7f13236b0000040300473045022100b51fc8882e30685e3260caffd0aad76f33d4cdeb33d668173d704c9743911e6002207bd071b6f3892ab592bfb0a7c48ffe1f411f745689da3787c3606a209ea184a1 . . . . [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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