www2.ei.tohoku.ac.jp
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:08:ad:53:e7:8f:00:b9:a5:82:38:bd:13:79:29:44:81:83 was issued on by Let's Encrypt.
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=www2.ei.tohoku.ac.jp
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 03:08:ad:53:e7:8f:00:b9:a5:82:38:bd:13:79:29:44:81:83Serial Number (int): 264289508831124766600229153782286638154115
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: 7a:02:5b:cf:f6:09:2a:0c:b4:aa:61:f7:5b:20:d9:4b:a5:f7:f0:39
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): f0:62:e8:2c:08:d1:2e:8c:f6:bb:49:71:c7:85:1e:b2:c5:b9:fa:68
Fingerprint (sha256): 0b:11:9e:33:ce:3a:0d:10:a6:20:c7:81:5e:e1:60:15:3c:18:30:00:f8:ef:ab:b5:4f:d2:16:10:cf:f7:90:ed
Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/
Revocation information
OCSP Server: http://ocsp.int-x3.letsencrypt.orgCheck the revocation status for certificate www2.ei.tohoku.ac.jp
1
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for www2.ei.tohoku.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
www2.ei.tohoku.ac.jp
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Certificate
The complete raw certificate details for www2.ei.tohoku.ac.jp in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIFXzCCBEegAwIBAgISAwitU+ePALmlgji9E3kpRIGDMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xOTA0MTEyMTI1MjdaFw0x OTA3MTAyMTI1MjdaMB8xHTAbBgNVBAMTFHd3dzIuZWkudG9ob2t1LmFjLmpwMIIB IjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEArF3rJqb6ga/w7sPBWgKa5OcB /sFiTp636hZyLEGNOmTtiYZsCRvPUWynNP2b5PkicgS9Gyh6PBf4oaQsn23BFMaK j/tMv3MEYYniI6nMzNkCFnF0bT3eg3wsftq6OYJM/3Zzh92ZPQe3ethgoSkzb9ZA 1MeLwHVsFkAR/22o+A8kdXYMK5WV/5rkHI88QoeVudOrJzMI3mEQZJACZXiQ1IYO c8/ZuNTBWzaKMsT8IZUyh4ej0zMQB1EEQiHa39dMnqG/IVnJc3zy9PgzQUXmUTKt t2hCsX22z4wzZ3hou/F/dVtnlOq5cHzaqNyqn9gxm46pm2/tbjZ4LbNGRhuZvwID AQABo4ICaDCCAmQwDgYDVR0PAQH/BAQDAgWgMB0GA1UdJQQWMBQGCCsGAQUFBwMB BggrBgEFBQcDAjAMBgNVHRMBAf8EAjAAMB0GA1UdDgQWBBR6AlvP9gkqDLSqYfdb INlLpffwOTAfBgNVHSMEGDAWgBSoSmpjBH3duubRObemRWXv86jsoTBvBggrBgEF BQcBAQRjMGEwLgYIKwYBBQUHMAGGImh0dHA6Ly9vY3NwLmludC14My5sZXRzZW5j cnlwdC5vcmcwLwYIKwYBBQUHMAKGI2h0dHA6Ly9jZXJ0LmludC14My5sZXRzZW5j cnlwdC5vcmcvMB8GA1UdEQQYMBaCFHd3dzIuZWkudG9ob2t1LmFjLmpwMEwGA1Ud IARFMEMwCAYGZ4EMAQIBMDcGCysGAQQBgt8TAQEBMCgwJgYIKwYBBQUHAgEWGmh0 dHA6Ly9jcHMubGV0c2VuY3J5cHQub3JnMIIBAwYKKwYBBAHWeQIEAgSB9ASB8QDv AHUAdH7agzGtMxCRIZzOJU9CcMK//V5CIAjGNzV55hB7zFYAAAFqDoF6xQAABAMA RjBEAiAwj6Am23BAGEQ2tSobOQ6bj6qAxK8D2oG/UCst4YdQgQIgbgQqOnQ6UVD/ dyMVRDOflDsAK0Gvdqi7Fu2UCVSajqUAdgBj8tvN6DvMLM8LcoQnV2szpI1hd4+9 daY4scdoVEvYjQAAAWoOgXk4AAAEAwBHMEUCIFvVTtNYQfBq8CASIvKAJBK/MHI0 lopbAxHGwb+F6Qx1AiEAv5sa5AuKOlwjCpOdWa89PAS3BMCzkbijbPEK6cFKGqow DQYJKoZIhvcNAQELBQADggEBAHd0t7fjw0BQzMWErkz4DpQYSdPWSW8L1twzrU0M wdWU9WYqajhAAN3QUMosTlX5bWq3gTjvMK6jhTtyqNRVElv71ieiikl7GWYQZ8wA 1pfUmYBbo4ceKQccCpG0nFG90S6Q1PUr9Xzdel8zs9ukam18u0/2iRYa6uXxZb3O qMcw15BbsZKWnlLPqyKtKfGTzqFWSyZbx8VYdqMz82YYKLk8CWnR0DyCRJezBeh/ 1JVLsb8g21eRMqko3JSJPMaIeO3Ac/3M39bF0gc92pQy/y4An9tle2KbM2Dor0Ji n8ZvorcJhzAyQcutoN+tvGHbnH32rljLpECWX1IzzeQR5cU= -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEArF3rJqb6ga/w7sPBWgKa 5OcB/sFiTp636hZyLEGNOmTtiYZsCRvPUWynNP2b5PkicgS9Gyh6PBf4oaQsn23B FMaKj/tMv3MEYYniI6nMzNkCFnF0bT3eg3wsftq6OYJM/3Zzh92ZPQe3ethgoSkz b9ZA1MeLwHVsFkAR/22o+A8kdXYMK5WV/5rkHI88QoeVudOrJzMI3mEQZJACZXiQ 1IYOc8/ZuNTBWzaKMsT8IZUyh4ej0zMQB1EEQiHa39dMnqG/IVnJc3zy9PgzQUXm UTKtt2hCsX22z4wzZ3hou/F/dVtnlOq5cHzaqNyqn9gxm46pm2/tbjZ4LbNGRhuZ vwIDAQAB -----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 264289508831124766600229153782286638154115 . . . . . . . . [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 'Let's Encrypt Authority X3' . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-04-11 21:25:27 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-07-10 21:25:27 +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 'www2.ei.tohoku.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 21759301421484450869353351559397178456364750034984453478470768015758955821956973961246746755747708374243879400482510061573855154059085125980297771695756461910992799222527153081128676245223541043213916980889128538632941019807180479264305688824551674573346622807679406532918862629875858726785879337224536394430919224649675615510572924014337390982649797133665727409484432480825711784267662133539642358484413491560413964823860664374812577413997140043382257380401213658750875276403045042768026420939033354261179163550012387987130130001115954426440333351817504256372309201646665728456095235187701922042785778918310463379903 . . . . . . . . . . . . . . . . . . . . [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) 7a025bcff6092a0cb4aa61f75b20d94ba5f7f039 . . . . . . . . . . . . . . . . [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 a84a6a63047dddbae6d139b7a64565eff3a8eca1 . . . . . . . . . . . . . . . . [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 (99 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://ocsp.int-x3.letsencrypt.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://cert.int-x3.letsencrypt.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 (24 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www2.ei.tohoku.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 (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 (244 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (241 bytes) 00ef007500747eda8331ad331091219cce254f4270c2bffd5e422008c6373579e6107bcc560000016a0e817ac500000403004630440220308fa026db7040184436b52a1b390e9b8faa80c4af03da81bf502b2de187508102206e042a3a743a5150ff77231544339f943b002b41af76a8bb16ed9409549a8ea500760063f2dbcde83bcc2ccf0b728427576b33a48d61778fbd75a638b1c768544bd88d0000016a0e817938000004030047304502205bd54ed35841f06af0201222f2802412bf307234968a5b0311c6c1bf85e90c75022100bf9b1ae40b8a3a5c230a939d59af3d3c04b704c0b391b8a36cf10ae9c14a1aaa . . . . [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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