rkobo.jp

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:f6:bb:76:ca:86:c5:62:06:b9:86:91:7d:fe:31:61:a8:fb 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): 03:f6:bb:76:ca:86:c5:62:06:b9:86:91:7d:fe:31:61:a8:fb
Serial Number (int): 345295502491797089097725547762587338385659
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: a3:35:2d:0e:f2:9c:6a:f0:48:d5:83:31:43:c3:9b:f7:31:11:9e:71
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): b1:67:5d:3a:30:8a:3a:0a:fd:51:61:c9:fb:6f:6f:fa:7c:3a:d6:11
Fingerprint (sha256): 64:d5:34:cd:e2:20:5a:97:d1:73:d7:4e:4d:46:df:2b:54:14:93:8b:d1:bb:6f:62:c9:03:01:c9:61:66:b7:f0

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-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAuCJ8ioOyEOCijhKQ1LBD
eVrzI95aJY5U3GkY5OFC1lB5wGyhI+9JWGObaR1KK+ohz6JyGoKPZhyyt43wvoxt
EzXTI06WbDFEra24VhlVaDpdT2vEgV0g4Z7+oMF2W8ivH6rEsE/ADcI3sQoKI+Ft
aUBPFcGowZRo9L+tJluOijjA/9Gn4Z8BJ1cjWtHbrhMENPC3SUj7TkyS77tjw3us
QecPsZ0BNgg6nTGObNQvxNRG8npFgb9TLaIvetzTUAVa6zV0cYnFf3cFrEB/1gE8
eee8XFfHfQJHytUShd6IauGurg0KBvgb0EIqmDD9MktBX1do3XtfbmNT4i1ZlMdA
BQIDAQAB
-----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 345295502491797089097725547762587338385659
 . . . . . . . . [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 2019-12-15 09:07:02 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-03-14 09:07:02 +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 23244854035084351836081795436104531789251479221336222308039514399813327967399370932119033335482014205304377967206576533587030880337574272052683530787437041400104915036607762642465462218920438955610513407105550972717134811474489885389486194796010305954072893140501187393847660082641569314550326083440598057154719945238588488636323742101338556397842059790827183580312486568999716487501834581809147785430096967063444254480951380415271282611770409253641476256934873252335410092163972653330904881235080631284910390060660586005617267989941141078590050604746682140840839988696404653528162016242196303785513647598621201743877
 . . . . . . . . . . . . . . . . . . . . [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)
							a3352d0ef29c6af048d5833143c39bf731119e71
 . . . . . . . . . . . . . . . . [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 (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 (243 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (240 bytes)
							00ee0075006f5376ac31f03119d89900a45115ff77151c11d902c10029068db2089a37d9130000016f09068e310000040300463044021f686df7a9432cb28f95e4635cc07214b450c4eceffcd83b8562215f7657218b022100ad09355c39eb2074774dcfcb60a9bc3ac39383fd1444f5d69395b011b9d776e100750007b75c1be57d68fff1b0c61d2315c7bae6577c5794b76aeebc613a1a69d3a21c0000016f09068e34000004030046304402207024b81b39a9f2c0d65ffe31059fb4f4cd7b89e189913d71314c5c31d1aa742302203da1b0b4d8454a6b29abf236740a70e5e8357aea06e9d39805efe0e41bcea89c
 . . . . [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)
		00042869e1bcf1a035b0d375ffe742253f3463157182d4349c92b788db160e89a47de2bd4149b635c3d6cb9d71e8bc583a4a6d7f298049cd362c4620f7dbb5fbc571fc338b4b4b647b333e6af387c3f26f8f6b2a6e8e87b871c5fe1d84cfbf5542104ab59bb703c2708ab5cf0eeaa89b2fd5d0c537e1ae167886b1cc9e3e7bf4d6ff2b160d784a93c6abb13eb30656ee0425690b4b717052ca3b6c8eb2612df4454ebcc72d0df62a38970fd68f0ccf13e6c18f00de3ca45f05fba14f1c02ec7216ec3b1fe7256e72998b41f4b39cf4f4bda1e638a89e0e1d3811fbe850d1bff7f88ebb9c0e528396b8d5596e36ca9914551c555f6cb493873051170e0a5c4a9905