ats2021.info.hiroshima-cu.ac.jp
Issued by R3
About this certificate
This digital certificate with serial number 03:89:d7:c9:44:be:cc:cc:d0:99:af:0f:e7:3e:14:6f:81:b0 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:
- DV certificate contains a subject common name, this is not recommended. If certificate policy 2.23.140.1.2.1 (CA/B BR domain validated) is included, only country and/or common name is allowed in SubjectDN. (BRs: 7.1.2.7.2)
- 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)
Certificate Subject
CN=ats2021.info.hiroshima-cu.ac.jp
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 03:89:d7:c9:44:be:cc:cc:d0:99:af:0f:e7:3e:14:6f:81:b0Serial Number (int): 308242371128532218321363436458529482834352
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: e6:c1:9f:10:f8:97:d1:87:10:2a:27:50:a3:71:57:d4:f3:17:cc:06
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6
Fingerprint (sha1): 80:a1:6b:35:1c:30:d9:80:f2:a6:3c:46:77:91:15:1c:7f:20:c8:66
Fingerprint (sha256): 5b:5c:84:e3:2d:1b:73:16:52:62:e4:f0:c9:fc:a1:02:2c:83:d8:ca:72:78:71:82:a8:0a:99:81:7d:b9:f5:ff
Issuing Certificate URL: http://r3.i.lencr.org/
Revocation information
OCSP Server: http://r3.o.lencr.orgCheck the revocation status for certificate ats2021.info.hiroshima-cu.ac.jp
2
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for ats2021.info.hiroshima-cu.ac.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
ats2021.info.hiroshima-cu.ac.jp
www.ats2021.info.hiroshima-cu.ac.jp
www.ats2021.info.hiroshima-cu.ac.jp
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Certificate
The complete raw certificate details for ats2021.info.hiroshima-cu.ac.jp in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIFMTCCBBmgAwIBAgISA4nXyUS+zMzQma8P5z4Ub4GwMA0GCSqGSIb3DQEBCwUA MDIxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MQswCQYDVQQD EwJSMzAeFw0yNDAxMTcyMDA0MDJaFw0yNDA0MTYyMDA0MDFaMCoxKDAmBgNVBAMT H2F0czIwMjEuaW5mby5oaXJvc2hpbWEtY3UuYWMuanAwggEiMA0GCSqGSIb3DQEB AQUAA4IBDwAwggEKAoIBAQDF53X5f43xbl+/Wreoc4ROD6Eh680+98RczCMmiy+5 R+xDFfxwsRU+YziEfAbQqxLaoxEA/DQOU0zcZWLS3N2/UabpiHCKAqYjlf4eIkC0 hurJWSKsiOkilNlUbxDNhqnqChMMMayBYFoUF+f9ZylVrpy4i9Ib6hh2rQfKFqoM aHQMSmVH/N4PelhUhgP/FPW4eoHElUCZLyOfsGdjk0GAtCZIyhH2ZoXMAeYriq3W wG77OwydissAUaYWXyeKrJ7oMvpSmIFdqFt/LaF0Z8OBat9aT0Y545zJT2t+zePg TJF++3D5wQ7RtMl/ocLqeE346Nlc/UYHu7+zFwFJ32ZPAgMBAAGjggJHMIICQzAO BgNVHQ8BAf8EBAMCBaAwHQYDVR0lBBYwFAYIKwYBBQUHAwEGCCsGAQUFBwMCMAwG A1UdEwEB/wQCMAAwHQYDVR0OBBYEFObBnxD4l9GHEConUKNxV9TzF8wGMB8GA1Ud IwQYMBaAFBQusxe3WFbLrlAJQOYfr52LFMLGMFUGCCsGAQUFBwEBBEkwRzAhBggr BgEFBQcwAYYVaHR0cDovL3IzLm8ubGVuY3Iub3JnMCIGCCsGAQUFBzAChhZodHRw Oi8vcjMuaS5sZW5jci5vcmcvME8GA1UdEQRIMEaCH2F0czIwMjEuaW5mby5oaXJv c2hpbWEtY3UuYWMuanCCI3d3dy5hdHMyMDIxLmluZm8uaGlyb3NoaW1hLWN1LmFj LmpwMBMGA1UdIAQMMAowCAYGZ4EMAQIBMIIBBQYKKwYBBAHWeQIEAgSB9gSB8wDx AHcAouK/1h7eLy8HoNZObTen3GVDsMa1LqLat4r4mm31F9gAAAGNGTz5UAAABAMA SDBGAiEAkj4KrG2CJn1cyUWB/k8dWVDBwIk+evnXGl0FtDCukKgCIQDmNyvGkXq6 /hQkf8twGQYE4vvjFzvyWyDc1kUTPIa4agB2AHb/iD8KtvuVUcJhzPWHujS0pM27 KdxoQgqf5mdMWjp0AAABjRk8+bgAAAQDAEcwRQIhAOhIINSn5BmQAkt8olLh9DuM 5WnAGYpc45ZJ0Gm2F9NZAiA3yg08KnHMPQLLAr2vksu3W8mGfmLY2xBVzM1dhaLm yDANBgkqhkiG9w0BAQsFAAOCAQEAL4HJrZt6crHysd2ocsJU4zsir2lICXbpcs1g hhuFlSQHiWwwls31Q17c2gYU1sjK1VxMPOA/RVsrQe0eL5nw41XjGlWuUmlRQ6qZ d/jol/2Alvfmm2EEk1gsrXwmFVyaE/HsxIpEoQXTG2RMmCkRPptsgzioM6lno7z1 vHske6lpAL6mXqw1o8drYnczVidPeADOdgAsiMGipPdkV3GvbdWZQ+7ezEipPUPS eIYC4ydVPokapxPFsNL8gNOou/YIsESVwjr77twzECmBr/WrLh0iS46LMJw61SYD axv+gxe6y1TvPgUXL02a9jnmONG40Y+1z3G54d4NQBdfHI5Y5Q== -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAxed1+X+N8W5fv1q3qHOE Tg+hIevNPvfEXMwjJosvuUfsQxX8cLEVPmM4hHwG0KsS2qMRAPw0DlNM3GVi0tzd v1Gm6YhwigKmI5X+HiJAtIbqyVkirIjpIpTZVG8QzYap6goTDDGsgWBaFBfn/Wcp Va6cuIvSG+oYdq0HyhaqDGh0DEplR/zeD3pYVIYD/xT1uHqBxJVAmS8jn7BnY5NB gLQmSMoR9maFzAHmK4qt1sBu+zsMnYrLAFGmFl8niqye6DL6UpiBXahbfy2hdGfD gWrfWk9GOeOcyU9rfs3j4EyRfvtw+cEO0bTJf6HC6nhN+OjZXP1GB7u/sxcBSd9m TwIDAQAB -----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 308242371128532218321363436458529482834352 . . . . . . . . [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 2024-01-17 20:04:02 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-04-16 20:04:01 +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 'ats2021.info.hiroshima-cu.ac.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 24983083671641355700254927811344814700826735402322145258058211630735226339739718910631000250043677025417524648176377038911273134493675015385914370084892110708056678184222888759951035470907219566990804605791454088157689495208899398334883814770840145091935793175440531814431319798163499863044959924488279062053577724211539136207764081381250128427411266081099235766296697991553412718883455251263676899694521207127187920167599649046740462765132785748729337477089231365865426992566719182266842773213630908432667276842375972809402271865575170125681688858411372792301946824805339504466564103220347801993876141893159835625039 . . . . . . . . . . . . . . . . . . . . [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) e6c19f10f897d187102a2750a37157d4f317cc06 . . . . . . . . . . . . . . . . [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 (72 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'ats2021.info.hiroshima-cu.ac.jp' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.ats2021.info.hiroshima-cu.ac.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) 00f1007700a2e2bfd61ede2f2f07a0d64e6d37a7dc6543b0c6b52ea2dab78af89a6df517d80000018d193cf9500000040300483046022100923e0aac6d82267d5cc94581fe4f1d5950c1c0893e7af9d71a5d05b430ae90a8022100e6372bc6917abafe14247fcb70190604e2fbe3173bf25b20dcd645133c86b86a00760076ff883f0ab6fb9551c261ccf587ba34b4a4cdbb29dc68420a9fe6674c5a3a740000018d193cf9b80000040300473045022100e84820d4a7e41990024b7ca252e1f43b8ce569c0198a5ce39649d069b617d359022037ca0d3c2a71cc3d02cb02bdaf92cbb75bc9867e62d8db1055cccd5d85a2e6c8 . . . . [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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