furukawa-yuichi.org

Issued by R3

About this certificate

This digital certificate with serial number 04:3f:d3:da:56:64:df:78:81:32:3f:c7:7d:a7:0d:0d:f8:6c 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=furukawa-yuichi.org

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 04:3f:d3:da:56:64:df:78:81:32:3f:c7:7d:a7:0d:0d:f8:6c
Serial Number (int): 370168533623165090630164734414866462144620
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: c7:81:03:1a:15:7b:15:3f:42:25:eb:35:85:85:25:77:8e:10:8b:9d
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): fe:89:64:86:ba:b8:cb:b0:dd:e8:81:dc:58:31:17:06:26:be:a0:f6
Fingerprint (sha256): fd:43:34:cc:93:d1:e4:8f:67:83:2d:10:28:ad:bf:fe:e5:5d:b3:0e:d1:74:09:05:85:a6:56:fb:81:34:a0:05

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-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAvve1E9uMsrFrTcwiUtZg
8PJWy6ISy1BQ92Ecrr40uCi/x1ayLJW9+2LJBHg2UhrcAqEBnEYfi++b4Nj2O+2M
oniG8aPSm18O5fkxV99HEk0K3PSkdKLZlrVdfawCX39l2ICTZ5WkCctyzepmgsvq
DL4iCur1ApewP1v+M7Q1eWfD8h1wPZY17+P/XgSSzG81aU7e8BeAbQ4uUu+wzpSI
PP3oli7VZPvcZFBEWxDpQP2V+XGtPrsLF99Bxgt7oB6NutHMWOJPxC+EhxEsqu+u
vxhhzMp/IcVUY+L4URReUkINFEPTqRVvjcMoU2e9vREVwLqE0eVcp5msOR5uInNs
4QIDAQAB
-----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 370168533623165090630164734414866462144620
 . . . . . . . . [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 2023-07-16 11:23:51 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2023-10-14 11:23:50 +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 24107426982628407241658083349383798967936613601841306839986844876814931622044393742761479485780755734628818936530975943745547675729394661784287917759486678614792357875989879643605949394498123361808997596498714634165197664332690295961623718540124432761824469258760496631912031315675643055511377567219719845272303232086957472290208858726303654713194175411792170277891600447448518482711707997854438325686803379915506386616370753053023333852718540386422914621878054279644919176696167863540501241189761798747066768643876611315596332727997794696095999105245678272836166302098159022448557692197112147954546258814794955189473
 . . . . . . . . . . . . . . . . . . . . [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)
							c781031a157b153f4225eb35858525778e108b9d
 . . . . . . . . . . . . . . . . [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 (246 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (243 bytes)
							00f1007700b73efb24df9c4dba75f239c5ba58f46c5dfc42cf7a9f35c49e1d098125edb499000001895ea8404a0000040300483046022100fc4a6379a8c0154ad64271de25eecc9f9c5e43699965a7f3e2d30685c787bae4022100d205e397b0b17aaf0718f1b621ca566394874d5aabf15af0c1162badc222a1ee0076007a328c54d8b72db620ea38e0521ee98416703213854d3bd22bc13a57a352eb52000001895ea8405c00000403004730450220397c2279632804a7927c4cf163d370d31e231cdfa7386ca6d24980540d0d7c07022100dc2c1c87613f8503c66151efc2d1ef718f714e76b255871d2a1da4563ff4e35c
 . . . . [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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