www.furukawa-yuichi.org

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 04:3e:02:9b:9b:f7:b6:0a:ef:2e:bf:05:1e:27:7d:a6:09:7f 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.furukawa-yuichi.org

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 04:3e:02:9b:9b:f7:b6:0a:ef:2e:bf:05:1e:27:7d:a6:09:7f
Serial Number (int): 369550116901542998248838845632407763552639
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: a5:0e:18:68:bd:d7:29:1d:5f:cc:3e:3e:0e:c6:92:21:4e:0b:ea:49
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): ed:45:4d:cc:01:a0:b6:a2:04:10:fb:29:46:ba:e9:c1:94:71:13:68
Fingerprint (sha256): 94:0e:c5:fb:c6:c0:e0:3b:42:b6:41:a8:46:59:7f:3a:d0:0a:92:e1:46:ad:c9:b5:f5:8b:b0:03:05:b7:68:50

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 www.furukawa-yuichi.org

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for www.furukawa-yuichi.org

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.furukawa-yuichi.org

Other certificates including the domain name furukawa-yuichi.org

(limited to 100 certificates)
www.furukawa-yuichi.org
www.furukawa-yuichi.org
www.furukawa-yuichi.org
www.furukawa-yuichi.org
www.furukawa-yuichi.org
www.furukawa-yuichi.org
furukawa-yuichi.org
www.furukawa-yuichi.org
www.furukawa-yuichi.org
www.furukawa-yuichi.org
www.furukawa-yuichi.org
www.furukawa-yuichi.org
furukawa-yuichi.org
www.furukawa-yuichi.org
www.furukawa-yuichi.org
www.furukawa-yuichi.org
www.furukawa-yuichi.org
furukawa-yuichi.org
furukawa-yuichi.org
furukawa-yuichi.org
furukawa-yuichi.org
furukawa-yuichi.org
www.furukawa-yuichi.org
furukawa-yuichi.org
www.furukawa-yuichi.org
furukawa-yuichi.org
www.furukawa-yuichi.org
www.furukawa-yuichi.org
furukawa-yuichi.org
www.furukawa-yuichi.org
www.furukawa-yuichi.org
furukawa-yuichi.org
furukawa-yuichi.org
furukawa-yuichi.org
furukawa-yuichi.org
furukawa-yuichi.org
www.furukawa-yuichi.org
www.furukawa-yuichi.org
furukawa-yuichi.org

Certificate

The complete raw certificate details for www.furukawa-yuichi.org in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAoqRGWvmdM+uXtzMb2nxX
WAgX35p9ts1ME8iYOXZTHQtE91W5XVVrYCyDHZtaGxlWoFX13jnRB5E16uAWjYHr
1RA5EdK+K7G+yvWa3tVYHwKrke/FRnHcO7V0H2rX6rvo1tzACGzjSCshqGgB39g+
dBH9HSr2v30VwPX3eMzZsyQqKqgP86aYtTprjK+x8MxKChmCDSNSaOQIOLS+U3+s
s3b2gd2tDUihtiaN5UyeShFDukPqmMyo1oyte5DM4VVh4f1DcCEURyjQ5WRARswA
JZKkpFVShN6DjkBQLLszAQUU0I4ENWw5FsucGiKmiEODzG8qHXeP09A+LLgLU4w2
PwIDAQAB
-----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 369550116901542998248838845632407763552639
 . . . . . . . . [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 2019-05-13 01:07:13 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-08-11 01:07:13 +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.furukawa-yuichi.org'
 . . . . . . . . [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 20531612340208806487772917090936251275704893836822888079992876920439129630144970916695019083643154490729593683936590614610522465507230547471003356569309598850404305209420251870775995501146187061258452910138145763718208146788890466109387120227875834776908216251054530023110566448219580696846609709585166099427423540250834755337980489152785545265898327706232552714687954220705132134016536879962373602170334411181746285269399167439711607160694667551284796346448684814363044755355471042118754491641799598423108307328480692854687040915380158961688299571232139775623724670400570114149136667855484386314325877008302764471871
 . . . . . . . . . . . . . . . . . . . . [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)
							a50e1868bdd7291d5fcc3e3e0ec692214e0bea49
 . . . . . . . . . . . . . . . . [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 (27 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.furukawa-yuichi.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)
							00f10077006f5376ac31f03119d89900a45115ff77151c11d902c10029068db2089a37d9130000016aaef1a7540000040300483046022100a0f97749785c534c3265934cea385964ae93b37f6d37d816cf62b220f85e6fb8022100d225b289a7fd2d6b374e54392931d5355c4e37f4c6e562bdb4faa90ecfbfc72800760063f2dbcde83bcc2ccf0b728427576b33a48d61778fbd75a638b1c768544bd88d0000016aaef1a70b0000040300473045022100c40a7a61cd2dfb217d2c836101b93b6a4713ab3783aedda7b510fec1c6865184022063490088cd47b4bf78a18df5845e14b5a7d02a8e275a652a48eb1efb53bd9799
 . . . . [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)
		00089f8caee395eb0b1ed5c979a229c9a0b3946a61be8ee9e04f9a4d8cd042de05f52973e65b1d886273414f8a1b5a287420153d7aee0bd94b8b104f4c7f95531e5bd709beffb2595790370de9c636f0b9c89256f7ad36fd1a082de275cd1559dc9294440834a6174780f2bc89ccfc13a5427c0fac56d6702563e9cded0a015158ec39f83ffc0814f1cfb952138f5937a5ca04cf313a88912ba4771ceb802fcb1af90786b3ec0c4fb80064c007a1006e29e6e25487d9393e317684cae19ddaea9ad8cd53ab0d2f69ebbfd1e1b672fe698774f28da65a0c89e307819619b45012a18bfa876d7e5820ce3a81e4a19bc68d232ce2efdaf6b1348e0e38b266c2a3508d