www.furukawa-yuichi.org

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:03:4c:72:60:fd:6e:57:38:aa:34:ae:ef:3b:0a:c6:ae:d7 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): 03:03:4c:72:60:fd:6e:57:38:aa:34:ae:ef:3b:0a:c6:ae:d7
Serial Number (int): 262459320112755277768840322451260335107799
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 04:05:a7:93:0a:38:6d:e5:b9:12:54:b4:f6:eb:fa:a8:63:45:50:a4
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 9b:35:d7:48:2d:ab:18:7b:b2:27:00:2b:bc:dd:97:df:99:e7:6a:8e
Fingerprint (sha256): 04:9a:b2:7f:53:da:f2:7c:88:71:cc:5c:fb:a4:07:b2:e6:a7:b1:6c:de:6e:4b:66:5c:81:33:8a:07:6b:d1:6a

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-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAsAe6oz6lbIxwK1xwb+oR
zFn1T/22tlaEWpOKYWjG7TfbcMEuFOaMppj3zXniAZMGMoGmuyltsQWpMLR5/GGH
TrDVcqMg5JNaumxV7SpwZiFDNWW5Yx+HnDyALXXiH+nBQeCQ7BXptvpTYgEG4LtY
AsPuZdJURe1pEhbxlYaXAAtcZS9eztiPY0BkeVs/NlksMTIaUkLczOZzjtQUsDZO
enDRwikJoPNH3J9/12jt7hsVmbgmmgT+KyeLn201feOrvxiPWS6rddaJXtGfiTjP
8mGZttDz2HWzZ3YQVC883SSKI5NfrnsmckR+cbosWiD2TdXcJRbf6qkGB5knK1qQ
sQIDAQAB
-----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 262459320112755277768840322451260335107799
 . . . . . . . . [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 2019-03-23 01:06:30 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-06-21 01:06:30 +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 22221753012316576707110222157806517575471557959523670970532678298811686283536947883461917338677943028334191368575284090436809715029402863983694663174636002552963765887032100714022665668927687693803680833193972317862278283054131160718113205685446894503368157492567193923230751610972062869153946577788681616590282723783581404530060514126429173139488768992573055608667253883085060665791933124273985198890839975902199316187007225916666632183542194297867558629238576837163688749314539733439861149642858760507477177060169614910538890544917617265307878114565794962165007009699308125405680007234588131728113994234791424856241
 . . . . . . . . . . . . . . . . . . . . [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)
							0405a7930a386de5b91254b4f6ebfaa8634550a4
 . . . . . . . . . . . . . . . . [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 (245 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (242 bytes)
							00f0007600e2694bae26e8e94009e8861bb63b83d43ee7fe7488fba48f2893019dddf1dbfe00000169a84caaa5000004030047304502210094d1a48f3b1cf4de201e2de2fe90633c10c5a359c9ed6286b4c170fadc765826022014d7b29f75ef2b872658e6f8247e23180db77978034b41acc1c02aa3a629fa1600760063f2dbcde83bcc2ccf0b728427576b33a48d61778fbd75a638b1c768544bd88d00000169a84caad9000004030047304502205ed0818e0d2c90d482ab3ff2a7e07064ac9afe8d754122094c4aeca04947d8a9022100bb63881b767f7e08c2ecf951e89f685027fcd2ff36aa1d6326074afd8a0585f8
 . . . . [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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