www.mi.t.u-tokyo.ac.jp
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:61:87:77:e5:57:65:41:70:3e:27:86:f8:2d:58:ff:87:2e was issued on by Let's Encrypt.
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We have idenified some issues with this certificate:
- Subscriber Certificate: commonName is deprecated. (BRs: 7.1.4.2.2)
Certificate Subject
CN=www.mi.t.u-tokyo.ac.jp
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 03:61:87:77:e5:57:65:41:70:3e:27:86:f8:2d:58:ff:87:2eSerial Number (int): 294524315700964886654344192218735218493230
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: cc:43:1b:f3:14:c6:9a:aa:58:65:de:f5:e7:df:78:bd:fd:b7:d3:c2
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): a0:0d:07:96:03:6c:6d:28:9b:0a:4e:ac:de:58:1b:86:1d:2c:1b:51
Fingerprint (sha256): 03:5d:84:ef:69:bd:68:6f:aa:71:67:57:ad:05:3b:bb:de:e0:b4:04:ff:c7:74:b6:a1:16:0e:b2:ba:9d:c1:85
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.mi.t.u-tokyo.ac.jp
1
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for www.mi.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.mi.t.u-tokyo.ac.jp
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Certificate
The complete raw certificate details for www.mi.t.u-tokyo.ac.jp in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIFYzCCBEugAwIBAgISA2GHd+VXZUFwPieG+C1Y/4cuMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xODEyMjMxMTI0NDdaFw0x OTAzMjMxMTI0NDdaMCExHzAdBgNVBAMTFnd3dy5taS50LnUtdG9reW8uYWMuanAw ggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQDJFhgmWBEx8EtopaNpenXP 6RAJHu197urYwsb7D0xgrwtU5rv95Bdk5fs+ya9r8Ic8wLA3kR5Kh1rpXB7xQGJh vDb+HfhG0hdi4zaxbSgD1wJDNBtqql6cqMTH70FLZ/ARN8+EK0usNraxO1Ouhvp3 won3/CK/1xdCftdavgJtbdXbDqyV4LaeP2YWGnVI6uaNFi9UkzKKh4D4lQ+3Z/o1 deV4GIWxBUc/+htGbf1i/CzJB8TkXaCl77BzFGpJhQTIp4/KX0hjNefFaOgcWad4 oqrXUHQHYq6n2oXuPNXGKA9b87Dfe68m5YjAWAD0lAUhEIyq2V3EnY9tJymRvbW1 AgMBAAGjggJqMIICZjAOBgNVHQ8BAf8EBAMCBaAwHQYDVR0lBBYwFAYIKwYBBQUH AwEGCCsGAQUFBwMCMAwGA1UdEwEB/wQCMAAwHQYDVR0OBBYEFMxDG/MUxpqqWGXe 9effeL39t9PCMB8GA1UdIwQYMBaAFKhKamMEfd265tE5t6ZFZe/zqOyhMG8GCCsG AQUFBwEBBGMwYTAuBggrBgEFBQcwAYYiaHR0cDovL29jc3AuaW50LXgzLmxldHNl bmNyeXB0Lm9yZzAvBggrBgEFBQcwAoYjaHR0cDovL2NlcnQuaW50LXgzLmxldHNl bmNyeXB0Lm9yZy8wIQYDVR0RBBowGIIWd3d3Lm1pLnQudS10b2t5by5hYy5qcDBM BgNVHSAERTBDMAgGBmeBDAECATA3BgsrBgEEAYLfEwEBATAoMCYGCCsGAQUFBwIB FhpodHRwOi8vY3BzLmxldHNlbmNyeXB0Lm9yZzCCAQMGCisGAQQB1nkCBAIEgfQE gfEA7wB1AFWB1MIWkDYBSuoLm1c8U/DA5Dh4cCUIFy+jqh0HE9MMAAABZ9sGYEoA AAQDAEYwRAIgEhm7cGKuhgyVB//nUGqNKbx4X+q8BNaGjIBsETTbHXECIGnx/SVK OWq9Npz0IcUa57VrDIq1bHZoakM18t5CyydeAHYAKTxRllTIOWW6qlD8WAfUt2+/ WHopctykwwz05UVH9HgAAAFn2wZfqAAABAMARzBFAiEAwNs+C11vHlNOJE37hb7D n8C4ab6VZorfGeBKZSMEaA4CIA8WzS5fhdHfrou7HkB0Z692qAQVXeYxK6w1PcmC TTwxMA0GCSqGSIb3DQEBCwUAA4IBAQBKXLK1VWDe51kHpmgyMLpt+oiumeMVg3hl +xFdHJ7Dngea4WJ8oVq/yO6CQQsQzIm3Gw4Xv5VGDBTQ1W6azyQMHSFTecMKQ7wX XrteqzgbAT29fy3rcak2m88IlmbzMInDHXGreFUVA3HT8jKslhwFgqwVCwPat2e9 yBjFl7wPNJzV/OC/X8rSkuPn9TAztGRW8ccpqXvt43XpmDVT/W0Ji5tR7XQrtWFn zcjdv6sil1KULdHUulZWwIt6fR4y9S7yMWZ6aQoPnM9PbVYVIXnm7/UWWM0fHKwD Hcjw2iKgY+29jnLKjzURTsXwDe6WvdMs+r66I/Kbk0Y2NHAwXo6D -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAyRYYJlgRMfBLaKWjaXp1 z+kQCR7tfe7q2MLG+w9MYK8LVOa7/eQXZOX7Psmva/CHPMCwN5EeSoda6Vwe8UBi Ybw2/h34RtIXYuM2sW0oA9cCQzQbaqpenKjEx+9BS2fwETfPhCtLrDa2sTtTrob6 d8KJ9/wiv9cXQn7XWr4CbW3V2w6sleC2nj9mFhp1SOrmjRYvVJMyioeA+JUPt2f6 NXXleBiFsQVHP/obRm39YvwsyQfE5F2gpe+wcxRqSYUEyKePyl9IYzXnxWjoHFmn eKKq11B0B2Kup9qF7jzVxigPW/Ow33uvJuWIwFgA9JQFIRCMqtldxJ2PbScpkb21 tQIDAQAB -----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 294524315700964886654344192218735218493230 . . . . . . . . [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 2018-12-23 11:24:47 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-03-23 11:24:47 +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 (commonName) . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'www.mi.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 25384794420874091152321283192680745459133127291501909258959186049721967011592881030645271183417557167397972378788679073808605177007886495654823053822665180312602393729842627636342634477554971180130495767310989610607367974119799917931351972316244888482327001981441801952956377965852906341728078690292322204379697118473009190911968150770630155294064914319810562438643959678022346721499054470802404169283805184531447395774130200470715962821993571350821492360948303850874970496020255781077188778308876608941812913384636231004493112733183298108072015817815323119297174173508853570236580567956990841358969121441143232247221 . . . . . . . . . . . . . . . . . . . . [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) cc431bf314c69aaa5865def5e7df78bdfdb7d3c2 . . . . . . . . . . . . . . . . [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 (26 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.mi.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 (244 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (241 bytes) 00ef0075005581d4c2169036014aea0b9b573c53f0c0e43878702508172fa3aa1d0713d30c00000167db06604a000004030046304402201219bb7062ae860c9507ffe7506a8d29bc785feabc04d6868c806c1134db1d71022069f1fd254a396abd369cf421c51ae7b56b0c8ab56c76686a4335f2de42cb275e007600293c519654c83965baaa50fc5807d4b76fbf587a2972dca4c30cf4e54547f47800000167db065fa80000040300473045022100c0db3e0b5d6f1e534e244dfb85bec39fc0b869be95668adf19e04a652304680e02200f16cd2e5f85d1dfae8bbb1e407467af76a804155de6312bac353dc9824d3c31 . . . . [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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