furukawa-yuichi.org

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 04:58:f0:ae:6d:ee:42:88:27:4f:3f:9d:ac:0f:57:a0:7a:ac 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): 04:58:f0:ae:6d:ee:42:88:27:4f:3f:9d:ac:0f:57:a0:7a:ac
Serial Number (int): 378713912424384876327397676009489109645996
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: 48:f5:8c:f6:f5:03:a8:19:41:2d:0f:d5:7a:92:55:05:89:e9:5c:1c
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 9d:fd:54:83:6b:cb:de:d5:88:f5:45:82:3e:02:94:aa:dc:fc:6b:f9
Fingerprint (sha256): 77:0c:a1:4a:f0:40:9a:73:b6:0e:92:d1:01:e8:33:97:c0:81:f2:6e:53:92:13:dc:e0:11:4d:93:ff:0b:cc:c8

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 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)

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-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA1GSz5eVOBqnrIQjbxYUZ
q4jypbUaoiSb70wj9FDp7OUcPZ1Xw645whwsjAkglm6ozJwaSj8oqJrLPeZLmGAm
L951aRZRTmes3wtyDQHaPyHe9q8+ttu/8HE8giPtdQwbeZacAvGaFQ3n49jykpCo
dPD7MNq2QI53uD7PuAqvtzK+inI6fJen8aWzNToxPBFmp2NkDrr6XusOmQ0l41i1
OnZBPYwooUtcfbMO7v1vZcnHWK3x8+odX8l9zapr36X9wG0uWCYalW6P4anvo4yG
HhSqqNqoVgs9s6YBvzYSItJ+03jBGPUJloUlEhBZyFFLi+248Pl50wPfjalxIWEX
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 378713912424384876327397676009489109645996
 . . . . . . . . [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 2018-07-28 12:39:17 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2018-10-26 12:39:17 +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 26812179018123117837660441677768487890886938285670865737654109936164666636822428611852477077947759404115743234363980476204121130202435452021115582650325566806057917909630201135765142998752677852990634166876828555036561418825067967530171724421823335173979172542499044342208914884178303375322190775364035452198722571398598871200388954283579935821243427944150368595758567088864621507472067170200718621365679551012597807914092552906276035680589967215359254713957945848605115941808676379734831060782005415744364849796562311564405517966335798953541065173387068502332313676577476512598561237405437534199336906802725549840191
 . . . . . . . . . . . . . . . . . . . . [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)
							48f58cf6f503a819412d0fd57a92550589e95c1c
 . . . . . . . . . . . . . . . . [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 (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 (246 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 1.3.6.1.5.5.7.2.2 (unotice)
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:12|false] UTF8String 'This Certificate may only be relied upon by Relying Parties and only in accordance with the Certificate Policy found at https://letsencrypt.org/repository/'
 . . . . . . . . . . . . . . . . [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)
							00f0007700c1164ae0a772d2d4392dc80ac10770d4f0c49bde991a4840c1fa075164f6336000000164e11d64b700000403004830460221008f429a8b8663daf28c9f8776a94d4525ce9d95584b5cbe4283bd99f3770ec5e8022100c36c367f563b75ce14f679fa7a86cbe993c754182b36ee3a61ef0c8ce97f9ac9007500a4501269055a15545e6211ab37bc103f62ae5576a45e4b1714453e1b22106a2500000164e11d64ae000004030046304402203717f3fd64d7997bfa7cea8c7641c657ef8f934c4a2c621a7a120c83f4cb91c80220565c3d3b32bab5ab479c66dd858a2fab6b7576457fcfc2d9bb5760ef4250ba96
 . . . . [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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