masahiro.co.jp

Issued by R3

About this certificate

This digital certificate with serial number 04:5a:1f:e4:27:b3:6f:04:e9:77:61:fd:d1:8f:c2:5b:a2:ae was issued on by Let's Encrypt.

With 2 subject alternative names this certificate can be used to secure multiple fqdn's. 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=masahiro.co.jp

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 04:5a:1f:e4:27:b3:6f:04:e9:77:61:fd:d1:8f:c2:5b:a2:ae
Serial Number (int): 379116947466708701037734160458958786765486
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: 3c:37:df:6c:8d:68:9d:ec:eb:9e:18:80:2a:67:5d:8b:ce:d2:11:65
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 61:61:31:91:2d:65:c1:da:28:8f:65:91:b3:7c:b5:9a:5d:ac:86:54
Fingerprint (sha256): ac:7a:d5:f4:9d:77:d1:ca:80:fd:a4:ca:3b:e2:28:1a:b7:5c:41:14:e9:84:f4:41:c1:de:dd:37:a7:dd:5e:4f

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

Revocation information

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

Check the revocation status for certificate masahiro.co.jp

2

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for masahiro.co.jp

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

masahiro.co.jp
www.masahiro.co.jp

Other certificates including the domain name masahiro.co.jp

(limited to 100 certificates)
www.masahiro.co.jp
www.masahiro.co.jp
www.masahiro.co.jp
www.masahiro.co.jp
www.masahiro.co.jp
www.masahiro.co.jp
www.masahiro.co.jp
www.masahiro.co.jp
masahiro.co.jp
masahiro.co.jp
www.masahiro.co.jp
www.masahiro.co.jp
masahiro.co.jp
www.masahiro.co.jp
masahiro.co.jp
www.masahiro.co.jp
www.masahiro.co.jp

Certificate

The complete raw certificate details for masahiro.co.jp in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA5jBs09KkIgi4QdVhEllI
MJ0Fa42HzQe3fXeZnbpVC/t5Hpkr5AytduBoDOGSE1hwP895h95XIznLh5eAuDB8
M8L3q9M2pUfypctGx48FjrBX1UpMj/7EIKFwIOO5uHC0elohSag14/wUkyERWPYy
O9WCvxHZ1l4gqzZrk/VTx04kXnEPpaP/YypxdEqXBAqgGcFmDSw9U4N/5bvFd48Z
s+ZctOoZam/6tF8tVZAj+se6lN8ZsPm6qvBpSSbU8kQj9WVzIke7Iu52duseHI1v
5hck+zTKI1BnvIyr6WF5GctIUTQWMBUr8KErmayL9yJVjWoVf3OXR3N8a/nTY9nq
HwIDAQAB
-----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 379116947466708701037734160458958786765486
 . . . . . . . . [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 2023-05-27 03:06:23 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2023-08-25 03:06:22 +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 'masahiro.co.jp'
 . . . . . . . . [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 29058689452528006958960871211177018722581860886474804534037872647267196719538293928440099938203148298067018983252553490941236311894555506966436513779933786470890623235264029324591509763202730370264315268250575253625073426550395112244392080429187015999982462747352505397979110352818770341878924499212457508433366878264575557425296757166131459471766989784941476005432677073132072460145817966083381808002680679581152054860330505327504448013972723547771553910239841784542437531442906670394663579183820064483127864718622635855716927330764783192298917339743237252559733145239631290315149156726376934192165428126711845349919
 . . . . . . . . . . . . . . . . . . . . [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)
							3c37df6c8d689deceb9e18802a675d8bced21165
 . . . . . . . . . . . . . . . . [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 (38 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'masahiro.co.jp'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.masahiro.co.jp'
 . . . . . . . . . . . . . . . . [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 (247 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (244 bytes)
							00f2007700b73efb24df9c4dba75f239c5ba58f46c5dfc42cf7a9f35c49e1d098125edb499000001885b62d36b0000040300483046022100acf32b8a7eed0506c638a3a697a2a442f4dda969e867d1e88d5660cb2a5fbb84022100e80437a93f94381303a2e9f766445ec65a80c568cc9701dd1832d643c0c0b1c1007700e83ed0da3ef5063532e75728bc896bc903d3cbd1116beceb69e1777d6d06bd6e000001885b62d3110000040300483046022100c396874b5f02e4861ab6215e1dd1ded12b37901568ea489bd370569e9d618347022100ffd9c7fdf8c8bc5b31a2b8222f6f0d3db220db2e9d7684c465eab8b20b9c2a2a
 . . . . [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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