furukawa-yuichi.org

Issued by R3

About this certificate

This digital certificate with serial number 04:d9:22:88:09:7c:02:30:34:e5:c4:71:b2:63:d5:df:ff:e4 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:
  • DV certificate contains a subject common name, this is not recommended. If certificate policy 2.23.140.1.2.1 (CA/B BR domain validated) is included, only country and/or common name is allowed in SubjectDN. (BRs: 7.1.2.7.2)
  • Subscriber certificates use of Subject Key Identifier is NOT RECOMMENDED (BRs v2: 7.1.2.7.6)
  • Subscriber Certificate: commonName is NOT RECOMMENDED. (BRs: 7.1.2.7.1)

Certificate Subject

CN=furukawa-yuichi.org

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 04:d9:22:88:09:7c:02:30:34:e5:c4:71:b2:63:d5:df:ff:e4
Serial Number (int): 422336317445480736867178410073183903285220
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: 0b:f1:b1:02:a4:75:9c:cc:ce:05:52:24:6e:1b:4d:06:bf:d2:de:24
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): c9:aa:51:3a:19:75:4a:49:ff:a8:24:14:9c:c9:93:bb:6a:1a:d0:41
Fingerprint (sha256): c9:f2:9f:71:36:4d:26:c4:06:ce:4e:88:26:c5:b0:b2:46:db:83:8d:07:f0:db:e3:dd:5e:2c:34:f5:7e:90:da

Issuing Certificate URL: http://r3.i.lencr.org/

Revocation information

OCSP Server: http://r3.o.lencr.org

Check the revocation status for certificate furukawa-yuichi.org

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for 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

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 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-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAvVCLVaaAul97DzgHjKyD
CLbZ176wz5nA5zphaLOYWrvM8sJegpaIc4XfRDeB7+aHC6aISK8cJyEus9z0iJqL
F8gbdhNfB0QhCfqWWffJGutroc6Y18pCxufug81HmQEEEIDY2ZdeYf/TJn1g+JxQ
1sb+fcdtlUD7sDlm7kVL/Z1tH0W1VhLrtoujvx8fjyNaQkxNRZLGxPtSEeXg4DxU
M47kTgyOWyhMxWujJBae2UoRSoB4dQoed5cwoyFsNPvTlNpPp3d2tpkTReAHVnGc
GVyxXt5G31Mn+Qp8Xk7zJi+TkB9RN85//ZH4+4BsASLRpM/cZh51DVBxIuFDzUaT
5wIDAQAB
-----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 422336317445480736867178410073183903285220
 . . . . . . . . [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 'R3'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-01-11 14:55:26 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-04-10 14:55:25 +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 '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 23898757501223666140794916993124500890771362472466209144605641502334167889775518930609734815113984245623377524068420315034922684789369599904342055185064932819757067612326287018577414703145919049363682766305986146960152407727109558055300386990162068391181965775792562974940522879931602326710522115198676904507969396763533420375363463370372686636472804720701286264236167762603285159414205259538017988635531074646064306604239389811751534294058397144845974667463381288902758077010896345905664862802167832338099331589734592490606257999411603795085225276269742172674708048153969926854635459608465557036497667152911563920359
 . . . . . . . . . . . . . . . . . . . . [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)
							0bf1b102a4759cccce0552246e1b4d06bfd2de24
 . . . . . . . . . . . . . . . . [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 142eb317b75856cbae500940e61faf9d8b14c2c6
 . . . . . . . . . . . . . . . . [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 (73 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://r3.o.lencr.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://r3.i.lencr.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 (23 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String '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 (12 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 1.3.6.1.4.1.11129.2.4.2
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (243 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (240 bytes)
							00ee007500a2e2bfd61ede2f2f07a0d64e6d37a7dc6543b0c6b52ea2dab78af89a6df517d80000018cf93c47b4000004030046304402205235ca2ff63cccd1fbeb2a55afc6a60599096d9521ea20a1f9b05917c8cfbcab02200b2126df654ded84832a20bacf26bd7ff42bf3206c90dc5db982b661d81dbec1007500eecdd064d5db1acec55cb79db4cd13a23287467cbcecdec351485946711fb59b0000018cf93c47bc000004030046304402200506be3516b160bd2a7b33dcad0ebe572fb480d83f2d616c4d66b751c330e24402202f7daf30dd95e6f27204a32a20f872b4b579bda76ff1d3f167640faaf3b9f3a1
 . . . . [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)
		000393a6902b6b47fa98e4e2429513d51f6d9c4455f908c69ce50f81f10d26a021c7b7d15d201e2be6326347a0547571a05a1c90c782b687edb355d1047c4f6bce7209b45573bcd5289e5cb1b40b5aea2be66496f12eaaeaa036dabfe436ca04510ea87268ba9eee5b7e022dce7459922cf47e196cf3dca8dab6ce313c2d1ef22d6886045b8d640bcd515cfd15dc52c33763f0701cd2ab265cc78436d4bfc61822197bba3f76f72087dc3d4658f76fa3bc933e892efa6e5ed8e5990094e97236eb3688b5b5dd41dce3362ec94ae856bc0b4d2e3b2d2663bbd3df805314ca1cc3e43c39123744c0d718aa22850ef4feaba4d5379da21531aafaab3ecc514e16838a