www.ict.mech.t.u-tokyo.ac.jp
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:39:19:88:6c:48:90:9a:85:31:39:53:a7:cc:87:12:3a:3b was issued on by Let's Encrypt.
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- Subscriber Certificate: commonName is deprecated. (BRs: 7.1.4.2.2)
Certificate Subject
CN=www.ict.mech.t.u-tokyo.ac.jp
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 03:39:19:88:6c:48:90:9a:85:31:39:53:a7:cc:87:12:3a:3bSerial Number (int): 280766891758291033531044822402098825148987
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: 13:6e:ac:b7:99:75:2d:95:1d:3c:3b:7d:40:6a:6d:99:86:13:e2:07
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): 87:96:5e:73:d9:96:6c:d1:01:42:77:d0:c8:c4:69:32:70:52:a2:c1
Fingerprint (sha256): 01:d1:41:25:50:4b:b3:4a:ea:ca:43:fe:56:b4:68:ed:36:40:47:30:69:2f:8b:42:d1:5f:bd:84:dd:cc:fc:6c
Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/
Revocation information
OCSP Server: http://ocsp.int-x3.letsencrypt.orgCheck the revocation status for certificate www.ict.mech.t.u-tokyo.ac.jp
1
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for www.ict.mech.t.u-tokyo.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
www.ict.mech.t.u-tokyo.ac.jp
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Certificate
The complete raw certificate details for www.ict.mech.t.u-tokyo.ac.jp in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIFcDCCBFigAwIBAgISAzkZiGxIkJqFMTlTp8yHEjo7MA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xOTA3MTkwNjQ4MjJaFw0x OTEwMTcwNjQ4MjJaMCcxJTAjBgNVBAMTHHd3dy5pY3QubWVjaC50LnUtdG9reW8u YWMuanAwggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQD4SJ53cCSygEu2 Obcbm0n3y5utxmIl0sQFQqfc9vv/ogw3jGyMnlByl/Y0TcHUE82O2yd08yIkpWZ4 7aqh9s8SV0uajK1iQRDxEqQ5Gh7qH0DZIeQpSSUWOdytQe7T3/U9ALt03dih4bhI Ayv4sDOwGJCseILqua07FUZZmX57Td5j+Mnm/KrUClESUW2/1t4IMpSlPEPUNqea vkaqxmD/LS560E1VhqPBW50A+9Lq5PfW1kfInd9C1Hd8wWCyqkDyi8LiW53AhRC+ G0Xk0sgNOq1VQSfj0R8tE/gMLEQd0iiLo/C4Th2CtcC10KkUqlhTYpC/plc2OXOT ZVUnY+9PAgMBAAGjggJxMIICbTAOBgNVHQ8BAf8EBAMCBaAwHQYDVR0lBBYwFAYI KwYBBQUHAwEGCCsGAQUFBwMCMAwGA1UdEwEB/wQCMAAwHQYDVR0OBBYEFBNurLeZ dS2VHTw7fUBqbZmGE+IHMB8GA1UdIwQYMBaAFKhKamMEfd265tE5t6ZFZe/zqOyh MG8GCCsGAQUFBwEBBGMwYTAuBggrBgEFBQcwAYYiaHR0cDovL29jc3AuaW50LXgz LmxldHNlbmNyeXB0Lm9yZzAvBggrBgEFBQcwAoYjaHR0cDovL2NlcnQuaW50LXgz LmxldHNlbmNyeXB0Lm9yZy8wJwYDVR0RBCAwHoIcd3d3LmljdC5tZWNoLnQudS10 b2t5by5hYy5qcDBMBgNVHSAERTBDMAgGBmeBDAECATA3BgsrBgEEAYLfEwEBATAo MCYGCCsGAQUFBwIBFhpodHRwOi8vY3BzLmxldHNlbmNyeXB0Lm9yZzCCAQQGCisG AQQB1nkCBAIEgfUEgfIA8AB2AG9Tdqwx8DEZ2JkApFEV/3cVHBHZAsEAKQaNsgia N9kTAAABbAk0DocAAAQDAEcwRQIgdaOVyz6rsCBi5YjL8mPgiHRPDZCf0idXXdX6 OA+HG9cCIQCm2aYpM8Pexq5IFpoK/jId4OJqZiziXmxML/C9s4c5FQB2ACk8UZZU yDlluqpQ/FgH1Ldvv1h6KXLcpMMM9OVFR/R4AAABbAk0DjUAAAQDAEcwRQIhAKA0 U44boD4i+OJhGnY+wl3mf28hSfW6ElAt27wjQqzoAiA4+/Iz/DqVzCO8cAFWl2MG MvG0xUDj0acjrMcdq373JjANBgkqhkiG9w0BAQsFAAOCAQEARK7mKeu8fU7fY097 sHQVp425C4CE5b8WBXuGf9L0YDy1OR3x79OZEmkLgirheqrwbcwlC7mN9zhh9oKV rHUj7VD5oSjYdeGMieJTTKnKA6TFE0lRQ+8gsgEpPq4jPWRalHz1ga0sx8y1mCyG oSO3I93P3EsDKsTTdyHxc3+5FyYcAqLwfvwxNi1O3WiRplWFKvVcD3pr9Z8RUSPg qmmtn/Rb6B7DWC9uPSr/uqi6Lff+2SikyCletO/T2L2L18hPCwqilcZrT6Ps/wDy dpfmtKPaDVcDz/YdeOgV87hjPmKCkXKicAN66mivOd7Ix9mvNRsCxeqc7hIFZoGr PuT9QA== -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA+Eied3AksoBLtjm3G5tJ 98ubrcZiJdLEBUKn3Pb7/6IMN4xsjJ5Qcpf2NE3B1BPNjtsndPMiJKVmeO2qofbP EldLmoytYkEQ8RKkORoe6h9A2SHkKUklFjncrUHu09/1PQC7dN3YoeG4SAMr+LAz sBiQrHiC6rmtOxVGWZl+e03eY/jJ5vyq1ApRElFtv9beCDKUpTxD1Danmr5GqsZg /y0uetBNVYajwVudAPvS6uT31tZHyJ3fQtR3fMFgsqpA8ovC4ludwIUQvhtF5NLI DTqtVUEn49EfLRP4DCxEHdIoi6PwuE4dgrXAtdCpFKpYU2KQv6ZXNjlzk2VVJ2Pv 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 280766891758291033531044822402098825148987 . . . . . . . . [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 2019-07-19 06:48:22 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-10-17 06:48:22 +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 'www.ict.mech.t.u-tokyo.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 31342909400052104959460640623867507847081508232635104929767447528772175393250444051794447338764496135843204505915623836824528753354293008050769819499344125632096227240936364366482912402864863799342363375441564603277091488714683669246385113913180925605720958243668588119245901642807960051100641879234531731655061616510405893603939901872462676081268428341765871137007553217881207264720029837144299973545388744913105095288391750996532973940762782056431028555174848237022369946518940988010373458476450992894593338211910085923410100669515138267343612228759262991282990893788709077397949884294234506084073738002596595232591 . . . . . . . . . . . . . . . . . . . . [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) 136eacb799752d951d3c3b7d406a6d998613e207 . . . . . . . . . . . . . . . . [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 (32 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.ict.mech.t.u-tokyo.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 (245 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (242 bytes) 00f00076006f5376ac31f03119d89900a45115ff77151c11d902c10029068db2089a37d9130000016c09340e870000040300473045022075a395cb3eabb02062e588cbf263e088744f0d909fd227575dd5fa380f871bd7022100a6d9a62933c3dec6ae48169a0afe321de0e26a662ce25e6c4c2ff0bdb3873915007600293c519654c83965baaa50fc5807d4b76fbf587a2972dca4c30cf4e54547f4780000016c09340e350000040300473045022100a034538e1ba03e22f8e2611a763ec25de67f6f2149f5ba12502ddbbc2342ace8022038fbf233fc3a95cc23bc70015697630632f1b4c540e3d1a723acc71dab7ef726 . . . . [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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