masahiro.co.jp

Issued by R3

About this certificate

This digital certificate with serial number 03:fb:1b:4c:3c:c8:26:c4:eb:66:5f:fc:c9:5c:fe:51:23:2c 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): 03:fb:1b:4c:3c:c8:26:c4:eb:66:5f:fc:c9:5c:fe:51:23:2c
Serial Number (int): 346784016895685942858078452611208023450412
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 26:72:60:c6:16:9c:c0:e0:86:e4:6e:a4:88:34:1b:f9:5e:ac:e1:6c
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 5c:e9:0e:d5:11:21:7c:97:18:91:c0:c3:fc:27:5a:6e:3b:fe:c8:1a
Fingerprint (sha256): d7:bc:34:43:64:36:74:c2:c3:7b:d7:f4:d2:70:02:e7:c8:01:25:ba:61:40:49:e1:14:01:c7:6a:95:0c:56:bd

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-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEArJEI756W0oNN1nBeWD0K
0sIc7RWPKVAFIKoM+ckEX7co2eG0IPgaW7PTzyYPdV8ZxrR/7+bxivtSwDOQn1fT
vUgb8YJEQZEmlzs3uokXaBRxBO1FY1cni1SXmGmdfMvMPg6cozm6sbKheCzvbU8w
JUJWFoTQoieMN+QC7F6NfgNjXVVsETKH9GpvM5n+hpzTBU4DAJOpwhCoZGhnTxb7
QdgNqJRwyHiKgi0+tLy6uXAOIxRDoe5rCoNgsCrfEdXdvgr7vKRJeYyLHzQFEr1C
3CzfraKZY5Y78ZLswRu6duuzw00TmmJHgIFN04+YfrZml3IOCAatlwQawMYO9LD+
LwIDAQAB
-----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 346784016895685942858078452611208023450412
 . . . . . . . . [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 2023-08-04 03:12:15 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2023-11-02 03:12:14 +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 21784507832023925325363846261866778387558860970656679156623429846985429123461305890518840491808447804464510824808064430624407456682106188608269150231869387469431637380951977133767491862050963699896700084904263386452136488091523991003952356955732160780523869479429351157977475819171149310429856319745420024310214974281085605192382257722138612029940621373434400519843117607237306542631021564649580154841302338474361156110228074063769846866279887303848521643676421002425955615854704764339880109365843853656560086980492899080934537458287778455178397245274988001187380686376602844632604235148641532805248246711860428078639
 . . . . . . . . . . . . . . . . . . . . [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)
							267260c6169cc0e086e46ea488341bf95eace16c
 . . . . . . . . . . . . . . . . [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 (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)
							00f10077007a328c54d8b72db620ea38e0521ee98416703213854d3bd22bc13a57a352eb5200000189bebefdef0000040300483046022100dcb078c4e0c7eab0aadeb61625c8d89a99ebed75382a435d548ea6d674839adb022100959ab8fc723eee6426d1ec9f643dabbaa18af6d9d6d69de48e872d5b66e927f9007600e83ed0da3ef5063532e75728bc896bc903d3cbd1116beceb69e1777d6d06bd6e00000189bebefdf500000403004730450220253ea7d8f14b6fab292eed5b6929458481adaf3df306749ae1b09fbd35a1ea4a022100d8681e447b83389d73bb6a86d5386b9d9c6c4e33458aaba2b5c4a10229f651a9
 . . . . [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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