cge.t.u-tokyo.ac.jp
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:98:f8:d7:a6:9f:ea:53:99:fb:21:c9:5b:af:ce:26:28:7d 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:
- Subscriber Certificate: commonName is deprecated. (BRs: 7.1.4.2.2)
Certificate Subject
CN=cge.t.u-tokyo.ac.jp
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 03:98:f8:d7:a6:9f:ea:53:99:fb:21:c9:5b:af:ce:26:28:7dSerial Number (int): 313390545833592423116966099077248384903293
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: 25:7b:fc:ee:df:54:26:2f:67:ad:88:4d:fe:dc:d4:1b:23:42:b1:b2
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): 74:a7:bd:6e:e5:95:b4:3f:50:2f:b9:92:ba:c9:67:8b:a0:89:0b:1c
Fingerprint (sha256): 00:f1:69:2c:32:2f:15:59:fb:65:76:cf:36:0e:e0:09:59:7c:34:44:aa:32:60:17:26:ae:f9:63:9c:9b:cd:a7
Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/
Revocation information
OCSP Server: http://ocsp.int-x3.letsencrypt.orgCheck the revocation status for certificate cge.t.u-tokyo.ac.jp
2
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for cge.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
cge.t.u-tokyo.ac.jp
www.cge.t.u-tokyo.ac.jp
www.cge.t.u-tokyo.ac.jp
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Certificate
The complete raw certificate details for cge.t.u-tokyo.ac.jp in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIFdzCCBF+gAwIBAgISA5j416af6lOZ+yHJW6/OJih9MA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0yMDAxMjAwMDE5MDZaFw0y MDA0MTkwMDE5MDZaMB4xHDAaBgNVBAMTE2NnZS50LnUtdG9reW8uYWMuanAwggEi MA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQDGGT199oIoVeL1y4J+S8NQlbPI KAIWDpatDEM2nMy5ecq9aPior23wHGeoRYMAiQ18gDcy3MGeDGcjM2DKMrdTZRAC 6pG98xvA9rUJhO42Ldj/P0PgWrox7NKp6VkrvCxPPM21N/zfbvQXut2KqvmyH9Uq Hwpmdz6EkeW0+dE8mK1Uyih7C0eoQUVAp4eI8VArrbFGaF1jvIrKIJIwNacImmqY g15RcgmUFcE8tHJDQiFWIF4kwjcGfE044+awr99l+OPl2XUne7NsDjzCKAUCDL5X 1WMijcVTWNqRRRWHtRHVhbHF/6DEDFbsoyT54qsgbnim0EQ3erLHYjkaDYSzAgMB AAGjggKBMIICfTAOBgNVHQ8BAf8EBAMCBaAwHQYDVR0lBBYwFAYIKwYBBQUHAwEG CCsGAQUFBwMCMAwGA1UdEwEB/wQCMAAwHQYDVR0OBBYEFCV7/O7fVCYvZ62ITf7c 1BsjQrGyMB8GA1UdIwQYMBaAFKhKamMEfd265tE5t6ZFZe/zqOyhMG8GCCsGAQUF BwEBBGMwYTAuBggrBgEFBQcwAYYiaHR0cDovL29jc3AuaW50LXgzLmxldHNlbmNy eXB0Lm9yZzAvBggrBgEFBQcwAoYjaHR0cDovL2NlcnQuaW50LXgzLmxldHNlbmNy eXB0Lm9yZy8wNwYDVR0RBDAwLoITY2dlLnQudS10b2t5by5hYy5qcIIXd3d3LmNn ZS50LnUtdG9reW8uYWMuanAwTAYDVR0gBEUwQzAIBgZngQwBAgEwNwYLKwYBBAGC 3xMBAQEwKDAmBggrBgEFBQcCARYaaHR0cDovL2Nwcy5sZXRzZW5jcnlwdC5vcmcw ggEEBgorBgEEAdZ5AgQCBIH1BIHyAPAAdQBep3P531bA57U2SH3QSeAyepGaDISh EhKEGHWWgXFFWAAAAW/AiChSAAAEAwBGMEQCIFfrKLoJVgo5gml7Y967jGGFVwu0 6YjY5Avpbn9rmDd+AiBJ+jpBkcXmk+GREUEV/3f5wFXENFytI0Q1QoOivSd4BQB3 ALIeBcyLos2KIE6HZvkruYolIGdr2vpw57JJUy3vi5BeAAABb8CIKjEAAAQDAEgw RgIhAI8YWwUZG86MO77zLWFWL7FbLUUAD8FOg1J9Y8FWve/4AiEAiI5mSdf65yr+ xUjpRyQaJ5ZcxCh9iDEiSvUkEmmM2JEwDQYJKoZIhvcNAQELBQADggEBADnSYS2h eRhGJfYcLM8a30KSFHzjUCJE/7OyOrR+JB/5ZSOhV7vp6oEohG2FCJk1fWKcOiol wvi2oJM2KpOxiUk5Ck323eTKIWD+dPN6gBqxX9W4LU992yokuV5McXOcyqd4R12r tOttLdoKpfM4KYTR0L+aEx3Iiq8X1KrTm/L2BlmEW81DTSSYjvTKxDwVg5qb9QrZ e6qhBtw7ySniJYkMQZH7yG2PwliGSaKxNSqKBfe9ZO7LdSIwVhjZI61HzW1HfUuL OiyM/329ZBAbQ/UhcAeMn+tM6aZejDmE4I8XQ4thBx0bUylQEXlwl2TKqlDYbGr+ T3002MzILtMddSM= -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAxhk9ffaCKFXi9cuCfkvD UJWzyCgCFg6WrQxDNpzMuXnKvWj4qK9t8BxnqEWDAIkNfIA3MtzBngxnIzNgyjK3 U2UQAuqRvfMbwPa1CYTuNi3Y/z9D4Fq6MezSqelZK7wsTzzNtTf83270F7rdiqr5 sh/VKh8KZnc+hJHltPnRPJitVMooewtHqEFFQKeHiPFQK62xRmhdY7yKyiCSMDWn CJpqmINeUXIJlBXBPLRyQ0IhViBeJMI3BnxNOOPmsK/fZfjj5dl1J3uzbA48wigF Agy+V9VjIo3FU1jakUUVh7UR1YWxxf+gxAxW7KMk+eKrIG54ptBEN3qyx2I5Gg2E swIDAQAB -----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 313390545833592423116966099077248384903293 . . . . . . . . [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 2020-01-20 00:19:06 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-04-19 00:19:06 +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 'cge.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 25007630791406718258471176533046191889297221594697948639095489204643423716717567710890880695223705070642413776079667676118744440276915537957042126473379060880647332055353396836529809906891832621522590278309833680090346953116821480212714657360225718605286052623072853517591875832494205823483614596871802274164466770882965076926479232256628772750787206676861622290994814332148229934878710405284609486306891985375349429917945667264023227079221477214952912547216515429341711605524341176443148170844033459065904351431072069004358806403155431621323029992546245902634657075434969157234202108142217110736012503575680728794291 . . . . . . . . . . . . . . . . . . . . [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) 257bfceedf54262f67ad884dfedcd41b2342b1b2 . . . . . . . . . . . . . . . . [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 (48 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'cge.t.u-tokyo.ac.jp' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.cge.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) 00f00075005ea773f9df56c0e7b536487dd049e0327a919a0c84a1121284187596817145580000016fc08828520000040300463044022057eb28ba09560a3982697b63debb8c6185570bb4e988d8e40be96e7f6b98377e022049fa3a4191c5e693e191114115ff77f9c055c4345cad2344354283a2bd277805007700b21e05cc8ba2cd8a204e8766f92bb98a2520676bdafa70e7b249532def8b905e0000016fc0882a3100000403004830460221008f185b05191bce8c3bbef32d61562fb15b2d45000fc14e83527d63c156bdeff8022100888e6649d7fae72afec548e947241a27965cc4287d8831224af52412698cd891 . . . . [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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