DV SSL/TLS Certificate for opentouryo.osscons.jp

Certificate is witin its validity period

Issued by Let's Encrypt (R10)

About the opentouryo.osscons.jp DV SSL/TLS Certificate

This certificate with serial number 05:50:5b:8c:43:b5:0e:1c:e6:57:37:82:26:50:d6:d9:9d:44 for opentouryo.osscons.jp was issued on by Let's Encrypt.

This DV SSL/TLS Certificate is currently within its validity period but we haven't checked the revocation status of this certificate, you can do this simply on revocationcheck.com. We have found some issues with the compliance of this certificate, they are be shown below. We hope this DV SSL/TLS Certificate review for opentouryo.osscons.jp provides you with the detailed information you were looking for.


We have identified some issues with this certificate:
  • Subscriber certificates use of Subject Key Identifier is NOT RECOMMENDED (BRs v2: 7.1.2.7.6)
  • Subscriber Certificate: commonName is NOT RECOMMENDED. (BRs: 7.1.2.7.1)

Let's Encrypt

Organization: Let's Encrypt
Country: US

This X.509 certificate will expire on

Certificate Details

Serial Number (hex): 05:50:5b:8c:43:b5:0e:1c:e6:57:37:82:26:50:d6:d9:9d:44
Serial Number (int): 462905707054919041118049075964631532019012
Serial Number Length: 139 bits, 18 octets

Subject Key Identifier: 7f:26:38:a5:15:89:62:0b:c5:06:37:5b:ba:e6:2d:1d:7f:d9:2b:db
Authority Key Identifier: bb:bc:c3:47:a5:e4:bc:a9:c6:c3:a4:72:0c:10:8d:a2:35:e1:c8:e8

Fingerprint (SHA-1): 9c:29:29:5f:d3:0e:ff:5c:ee:a5:b3:db:df:b9:6a:b6:7d:32:0f:e3
Fingerprint (SHA-256): 0e:b8:76:29:7a:94:a1:ae:36:2f:3b:cd:74:d0:29:07:e5:88:81:e9:52:10:2c:f3:a7:c0:33:6f:b7:18:53:47

Issuing Certificate URL: http://r10.i.lencr.org/

Revocation Information

CRL Distribution Point: http://r10.c.lencr.org/69.crl

Check the revocation status for certificate opentouryo.osscons.jp
1
DNS Names
0
Email Addresses
0
IP Addresses

Advanced Certificate Properties

Technical details of the X.509 certificate for opentouryo.osscons.jp

Public Key Algorithm
RSA
Key Size
2048
Signature Algorithm
SHA256 with RSA
Key Usage
Key Encipherment
Digital Signature
Extended Key Usages
Server Authentication
Client Authentication
Extensions
10
CA Certificate
This is not a CA certificate

Subject Alternative Names

opentouryo.osscons.jp

X.509 Certificate

The complete raw X.509 certificate details for opentouryo.osscons.jp in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAnUDWj4YF43dDSluS/hqj
w2b5fwjuXofP1Sf7AEIZxvv8nTDZ+5HD0vSxVPTsFPUli3KMNSnQ8mX+9f2tMZRf
Mh1QukK3nmBJE9tYJl/YWGjiWE/BZtRbTswR/MU7ot5Oq2+JDJifv+oN7ZboMEZX
5k26Fa2hf1PnfJvN0JLA2ME/hzNG++SMn523Th266aPVppeNmkEgCmUFhpHy0yub
a8hSWg74XCfcgMkbyOKQn5S6qeapXgUz+/HbbJfvnOAaC2U8NQmhyvax2yCpMibg
vNrrK0NNZBaSZouihho6i7viyOFjxLZt2mBFSABhvE2R3vKNq9hYmu/kiZP6lVkS
cwIDAQAB
-----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 462905707054919041118049075964631532019012
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.113549.1.1.11
 . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'R10'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2025-06-30 19:06:48 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2025-09-28 19:06:47 +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
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'opentouryo.osscons.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
 . . . . . . . . . . . . . . . . [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 19851386751984371492356056279723164837483460132966928663079314271206298466692895584314977603202451843116300726267736468110870558000548691405190784043096969013633057071801469975237745589119505533964062938317770151966726679296941938131388279094380202706863421877789979261479156855191316195427399698352282011715252236733850226889710692200489080717938142434362193010118552934667352356832280283326301436286525684172710644326132880035762663477625650138313970312848071711919010167194220075185047041758155920775193350218564294914109826388277244558153850179293168878028309411283678685620909157373387244913858909928726929674867
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.3.2
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.19
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (22 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (20 bytes)
							7f2638a51589620bc506375bbae62d1d7fd92bdb
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.35
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (24 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|false] OtherName bbbcc347a5e4bca9c6c3a4720c108da235e1c8e8
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.1.1
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (39 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.48.2
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://r10.i.lencr.org/'
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.17
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (25 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'opentouryo.osscons.jp'
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.32
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.31
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (39 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|true] OtherName 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|true] OtherName 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://r10.c.lencr.org/69.crl'
 . . . . . . . . . . . . . . . . [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)
							00f00076007d591e12e1782a7b1c61677c5efdf8d0875c14a04e959eb9032fd90e8c2e79b800000197c271abbd00000403004730450220580927dcbd2b2fea2eb8b6a012580776b57ac280670605ce4cf5617e04a0c226022100800391fc47a3c24c57edb28e44cc2670d25fed4fcf629a6eebc6a41e3533331c007600ccfb0f6a85710965fe959b53cee9b27c22e9855c0d978db6a97e54c0fe4c0db000000197c271b443000004030047304502207b754ee68e3c05ba1c997f061640617898a08c566961d0a560fcf1cfdee0f95e022100c955561cf16e0dadf706eb71f4bcabd21c7f706d0f162d50888b518edfc3af14
 . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.113549.1.1.11
 . . . . . . . . [c:0|t:5|false] NULL []
 . . . . [c:0|t:3|false] BIT STRING (2048 bits)
		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