rkobo.jp

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 04:db:25:bb:14:74:cd:ce:7b:30:d2:c4:48:3c:aa:48:85:fd 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=rkobo.jp

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 04:db:25:bb:14:74:cd:ce:7b:30:d2:c4:48:3c:aa:48:85:fd
Serial Number (int): 423021134892985450957210609545999729329661
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: 52:31:97:91:25:d5:a6:b4:7a:28:1d:1a:bf:9e:29:06:20:3f:10:7b
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 51:c9:f0:4b:e3:89:65:ba:cd:72:3b:62:ce:44:40:f7:43:18:fc:9e
Fingerprint (sha256): f4:32:51:0b:80:39:c1:45:fb:44:11:89:b2:8f:be:cd:8e:b4:78:a7:d3:cc:30:82:f6:54:e8:c4:a8:eb:50:67

Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/

Revocation information

OCSP Server: http://ocsp.int-x3.letsencrypt.org

Check the revocation status for certificate rkobo.jp

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for 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

rkobo.jp

Other certificates including the domain name rkobo.jp

(limited to 100 certificates)
www.rkobo.jp
rkobo.jp
www.rkobo.jp
rkobo.jp
rkobo.jp
rkobo.jp
www.rkobo.jp
www.rkobo.jp
rkobo.jp
www.rkobo.jp
rkobo.jp
rkobo.jp
rkobo.jp
www.rkobo.jp
rkobo.jp
rkobo.jp
rkobo.jp
www.rkobo.jp
www.rkobo.jp
www.rkobo.jp
rkobo.jp
www.rkobo.jp
rkobo.jp
www.rkobo.jp
rkobo.jp
rkobo.jp
www.rkobo.jp
www.rkobo.jp
www.rkobo.jp
www.rkobo.jp
www.rkobo.jp
rkobo.jp
rkobo.jp
www.rkobo.jp
rkobo.jp
www.rkobo.jp
rkobo.jp
rkobo.jp
securetest.rkobo.jp
rkobo.jp

Certificate

The complete raw certificate details for rkobo.jp in PEM and ASN.1 format.

Certificate (PEM)

-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAsto4H9GGtYovzui3rlBQ
ax0a1ITWiOJoKGimbw34R7xicoLagt2RjciefVkfSSfkhrKXu0yD8TfR5qu5N1mZ
ecvu0yVs0M0wRoaI9+auFKxSdKY6ypHTAx2hCrcjgr2wLhw3rQCLVr2VDWdK1jTC
NnrQv/q8leHEafMzcoQA1rBdr1y80WCGFgnrECwZQigfdt0/IlDW99xUpXAyv6yp
+2tKCWaJlWbByI7WiCxlYkT2mZhmDq98YaSLLuoE0mGxDRvT9v+YPGRsg9jUcTAv
NvleDzFrkzEvMR+o86HR7zIICIyREbNuG3F1DnxCqCVoQ43o5ixhJPmLEVyrI00S
UQIDAQAB
-----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 423021134892985450957210609545999729329661
 . . . . . . . . [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 2018-09-19 12:41:41 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2018-12-18 12:41:41 +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 '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 22578026199590944701709787063845878024803379124722078885733231067754999349968324543780398369644743099078313746909343211094048273066757627822542926654112264669472883610700898490036522029731637977756155395531076560683646482804042942106266922193091521183223879353853103793124361027159884709826462356968281518409898086092503402576986636274244725696438117676557079937539911410078969095260207305157663576696146152089653778355070851117764553604033803986523640811447676392374146475940989288398107523525208275553665021707024338637105576356077413212770085420995824420609922455964846858079183543173007262574247354666558499394129
 . . . . . . . . . . . . . . . . . . . . [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)
							5231979125d5a6b47a281d1abf9e2906203f107b
 . . . . . . . . . . . . . . . . [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 (12 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String '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 (246 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 1.3.6.1.5.5.7.2.2 (unotice)
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:12|false] UTF8String 'This Certificate may only be relied upon by Relying Parties and only in accordance with the Certificate Policy found at https://letsencrypt.org/repository/'
 . . . . . . . . . . . . . . . . [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 (243 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (240 bytes)
							00ee007600c1164ae0a772d2d4392dc80ac10770d4f0c49bde991a4840c1fa075164f6336000000165f210a3030000040300473045022100a62dc57a8280b479b4dae01e3673e6e9762b88ab5b017e467eba6e20656a6d4902201d461f775f0ca63ad388f85bfcffec79af5d977f3dc90c26bad0992023d51dbf007400293c519654c83965baaa50fc5807d4b76fbf587a2972dca4c30cf4e54547f47800000165f210a3190000040300453043021f65b9932d5f35ee444b3d38286ab4259a0ffef65a19cecf191969c724ce03ee0220312f48d1ca043e78cb75c0e6c9bb8533820e32e64428c2c9c410dd475351d85e
 . . . . [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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