t.seto-solan.ed.jp

Issued by R3

About this certificate

This digital certificate with serial number 04:54:38:b8:9a:f9:55:22:c8:9f:8a:b0:53:43:22:77:72:a0 was issued on by Let's Encrypt.

This certificate is currently not expired, we haven't checked the revocation status of this certificate but you can do this simply on revocationcheck.com. 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=t.seto-solan.ed.jp

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate will expire on

Certificate Details

Serial Number (hex): 04:54:38:b8:9a:f9:55:22:c8:9f:8a:b0:53:43:22:77:72:a0
Serial Number (int): 377108257842030982919723396878771944911520
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: a2:cf:20:78:b1:e7:2d:b8:dd:bc:04:58:26:7c:51:7e:fa:05:14:7a
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 04:aa:44:86:73:b3:13:95:9f:6a:ac:a4:05:08:23:20:17:13:df:84
Fingerprint (sha256): 0c:6b:99:80:ad:9c:ad:c4:8f:27:a3:0e:2a:46:83:f8:1e:f4:bc:d7:46:1e:9f:d6:49:de:76:bb:1c:fd:27:56

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

Revocation information

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

Check the revocation status for certificate t.seto-solan.ed.jp

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for t.seto-solan.ed.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

t.seto-solan.ed.jp

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Certificate

The complete raw certificate details for t.seto-solan.ed.jp in PEM and ASN.1 format.

Certificate (PEM)

-----BEGIN CERTIFICATE-----
MIIE8jCCA9qgAwIBAgISBFQ4uJr5VSLIn4qwU0Mid3KgMA0GCSqGSIb3DQEBCwUA
MDIxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MQswCQYDVQQD
EwJSMzAeFw0yNDA1MzExNTA5NTdaFw0yNDA4MjkxNTA5NTZaMB0xGzAZBgNVBAMT
EnQuc2V0by1zb2xhbi5lZC5qcDCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoC
ggEBAMBvKqt27OpLVbGaDQ4YbQsDowU3ivDck9+6K8qm8n413P9YBddcimd3wYBh
4wJIisxeumXrjCEGMOc0Yl4ARGvWuZFWeUaxftSrdzSaPk+PKSz6av/Arbh7HDTq
7igZWaKc1dcuJozBecjUrn802i8aGOsheifqbZo9TRA+IFMC7/LfJ2ABArP0ZxUq
KlJlQo99vVQOzNU4O4an+KTrLWEHAXdGa6ETtQBv9aXzfQOAkdxABM1AN3rCtacQ
mogTJxNItL+nvBuOwgQWzGrGlbTYeuFyV7r58VtXIguVWNHhqVsxh8O4D8Fa5req
bWercvU5SdTZhQop+tVox5Fs1AcCAwEAAaOCAhUwggIRMA4GA1UdDwEB/wQEAwIF
oDAdBgNVHSUEFjAUBggrBgEFBQcDAQYIKwYBBQUHAwIwDAYDVR0TAQH/BAIwADAd
BgNVHQ4EFgQUos8geLHnLbjdvARYJnxRfvoFFHowHwYDVR0jBBgwFoAUFC6zF7dY
VsuuUAlA5h+vnYsUwsYwVQYIKwYBBQUHAQEESTBHMCEGCCsGAQUFBzABhhVodHRw
Oi8vcjMuby5sZW5jci5vcmcwIgYIKwYBBQUHMAKGFmh0dHA6Ly9yMy5pLmxlbmNy
Lm9yZy8wHQYDVR0RBBYwFIISdC5zZXRvLXNvbGFuLmVkLmpwMBMGA1UdIAQMMAow
CAYGZ4EMAQIBMIIBBQYKKwYBBAHWeQIEAgSB9gSB8wDxAHcAPxdLT9ciR1iUHWUc
hL4NEu2QN38fhWrrwb8ohez4ZG4AAAGPz2o+TAAABAMASDBGAiEA7JoXPQIGB3S9
wW6ex7glvSmMAAVVjOMNxYL8TaT2x6sCIQD++GMGcUYFE8pR/8OvrORU6/mC+g/A
fbFrpObYesWUIQB2AHb/iD8KtvuVUcJhzPWHujS0pM27KdxoQgqf5mdMWjp0AAAB
j89qPmkAAAQDAEcwRQIhALA6WZQnLPjNoPsjNcswAldjySoHGb/rpYVKl1mXI0Jq
AiA1yPu0fN9PhLcutgmMi+Epvx3454yMhXm/TihUc0iJPTANBgkqhkiG9w0BAQsF
AAOCAQEAhvEq05I4EHSa+PFukRneuk78fvzObDBKhZ8TsP9D4TvQVcUeVg4bz0VT
xS36DGD225IeR7va7OYdmcwkt5MWJjAJRQR0A8QCZkLDU6qHTnFRDZf+kaoCbXw4
4doNjr6rt1hWEEVe9yyx56AdA14LGnuYHJMtbMXax/z90NGLNAuRcAiHPmedF57Y
J4lF4LQE2vJQxw7s84L/paFPdtH15D00FPhsRzE2IcFBijgycrkbck9Bme8vw6SD
hkSieIY1YC9C+Nflg1cqQLY+ZXCBPi5zqjkyAp0udXmRBlKxtGlB0tA09AQ96VUE
FqceE3Ul5IyMO5w0VzsCK/ZH9f0JCw==
-----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAwG8qq3bs6ktVsZoNDhht
CwOjBTeK8NyT37oryqbyfjXc/1gF11yKZ3fBgGHjAkiKzF66ZeuMIQYw5zRiXgBE
a9a5kVZ5RrF+1Kt3NJo+T48pLPpq/8CtuHscNOruKBlZopzV1y4mjMF5yNSufzTa
LxoY6yF6J+ptmj1NED4gUwLv8t8nYAECs/RnFSoqUmVCj329VA7M1Tg7hqf4pOst
YQcBd0ZroRO1AG/1pfN9A4CR3EAEzUA3esK1pxCaiBMnE0i0v6e8G47CBBbMasaV
tNh64XJXuvnxW1ciC5VY0eGpWzGHw7gPwVrmt6ptZ6ty9TlJ1NmFCin61WjHkWzU
BwIDAQAB
-----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 377108257842030982919723396878771944911520
 . . . . . . . . [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 2024-05-31 15:09:57 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-08-29 15:09:56 +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 't.seto-solan.ed.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 24292572885927198675877883736331019050466228723458767328376689185680283099509542372901636033623555832980184779677997314442379573870614339999848627092122420009106892841697833031869446664574044454384913381176354945989962465466899024046623643010618777747752651939745083022570111182535974232658548876798711346318675689943813178184902634366138588899388367098371954932403233953087802795833212612514360246896020551067941051806371164765460920946191521905569641698752889556355888606105324864691413142927165193319426422138839490294042508953246362771788171150790611755926414488087194361539041852861941000079445359244928208393223
 . . . . . . . . . . . . . . . . . . . . [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)
							a2cf2078b1e72db8ddbc0458267c517efa05147a
 . . . . . . . . . . . . . . . . [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 (22 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 't.seto-solan.ed.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)
							00f10077003f174b4fd7224758941d651c84be0d12ed90377f1f856aebc1bf2885ecf8646e0000018fcf6a3e4c0000040300483046022100ec9a173d02060774bdc16e9ec7b825bd298c0005558ce30dc582fc4da4f6c7ab022100fef8630671460513ca51ffc3aface454ebf982fa0fc07db16ba4e6d87ac5942100760076ff883f0ab6fb9551c261ccf587ba34b4a4cdbb29dc68420a9fe6674c5a3a740000018fcf6a3e690000040300473045022100b03a5994272cf8cda0fb2335cb30025763c92a0719bfeba5854a97599723426a022035c8fbb47cdf4f84b72eb6098c8be129bf1df8e78c8c8579bf4e28547348893d
 . . . . [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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