www4.dumbo.ai.kyutech.ac.jp
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:c5:ee:02:61:f9:60:e5:d4:66:ed:06:4c:a6:b8:db:b3:3e 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=www4.dumbo.ai.kyutech.ac.jp
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 03:c5:ee:02:61:f9:60:e5:d4:66:ed:06:4c:a6:b8:db:b3:3eSerial Number (int): 328688852713447676717822593060149068018494
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: da:49:a8:e9:53:3d:54:19:f9:48:df:d4:fa:2c:74:7a:45:71:e3:bc
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): f8:b4:68:2a:4c:33:fe:91:2b:59:9d:03:92:49:62:dc:c5:c1:c1:a9
Fingerprint (sha256): 15:ee:77:cd:22:54:b5:22:df:c6:94:3e:0b:32:12:5c:10:2b:41:b7:3b:b3:6a:a4:b1:1e:31:6a:9a:cd:b5:7c
Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/
Revocation information
OCSP Server: http://ocsp.int-x3.letsencrypt.orgCheck the revocation status for certificate www4.dumbo.ai.kyutech.ac.jp
1
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for www4.dumbo.ai.kyutech.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
www4.dumbo.ai.kyutech.ac.jp
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Certificate
The complete raw certificate details for www4.dumbo.ai.kyutech.ac.jp in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIGHzCCBQegAwIBAgISA8XuAmH5YOXUZu0GTKa427M+MA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xODEwMDUxMTAxMjJaFw0x OTAxMDMxMTAxMjJaMCYxJDAiBgNVBAMTG3d3dzQuZHVtYm8uYWkua3l1dGVjaC5h Yy5qcDCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBAMKAv7LT6Z0ybsc7 gVz20dH/rmhr2leb+swUo8LOsyhdC+j2dmiJDLB5MI7MMpd+q9FrnPmnmaB6yhmh lQgGtWbwQKKqYt+3mkrv8aakG5aNhl8b83rcNXBQE8ETBlqR1DTzQpfXTtERsw5T nbD6RD68N7LpwiqzjaYsusOliyfeRlVL6mnMtGp+IwV22PZdVKrv/DwLFZbz5bxd d2G+VsyXk3yUHE9y3Ofnhd1ypVGGPsT/0VYxgJXF+AIqljUR9a/eENJJGOr3vM2u sDbSKa35TklOKZc/4Lmod0Hda4xyUlBeBZO3hyb+7BQGp8IvPti1VCtFm4hFa52X 2ietXLcCAwEAAaOCAyEwggMdMA4GA1UdDwEB/wQEAwIFoDAdBgNVHSUEFjAUBggr BgEFBQcDAQYIKwYBBQUHAwIwDAYDVR0TAQH/BAIwADAdBgNVHQ4EFgQU2kmo6VM9 VBn5SN/U+ix0ekVx47wwHwYDVR0jBBgwFoAUqEpqYwR93brm0Tm3pkVl7/Oo7KEw bwYIKwYBBQUHAQEEYzBhMC4GCCsGAQUFBzABhiJodHRwOi8vb2NzcC5pbnQteDMu bGV0c2VuY3J5cHQub3JnMC8GCCsGAQUFBzAChiNodHRwOi8vY2VydC5pbnQteDMu bGV0c2VuY3J5cHQub3JnLzAmBgNVHREEHzAdght3d3c0LmR1bWJvLmFpLmt5dXRl Y2guYWMuanAwgf4GA1UdIASB9jCB8zAIBgZngQwBAgEwgeYGCysGAQQBgt8TAQEB MIHWMCYGCCsGAQUFBwIBFhpodHRwOi8vY3BzLmxldHNlbmNyeXB0Lm9yZzCBqwYI KwYBBQUHAgIwgZ4MgZtUaGlzIENlcnRpZmljYXRlIG1heSBvbmx5IGJlIHJlbGll ZCB1cG9uIGJ5IFJlbHlpbmcgUGFydGllcyBhbmQgb25seSBpbiBhY2NvcmRhbmNl IHdpdGggdGhlIENlcnRpZmljYXRlIFBvbGljeSBmb3VuZCBhdCBodHRwczovL2xl dHNlbmNyeXB0Lm9yZy9yZXBvc2l0b3J5LzCCAQIGCisGAQQB1nkCBAIEgfMEgfAA 7gB1AFWB1MIWkDYBSuoLm1c8U/DA5Dh4cCUIFy+jqh0HE9MMAAABZkQajOEAAAQD AEYwRAIgNjNDqhX+Bt5YevpuHroLTbCe4xuaSCe/CwalribaV/ICIGSf5+QvXRMM kjZIrKf6lNfkHcQ+ccRfNKR8+KImHvggAHUAKTxRllTIOWW6qlD8WAfUt2+/WHop ctykwwz05UVH9HgAAAFmRBqO0wAABAMARjBEAiBkuJCfv82fmD6lZIoZywPk5o3a 6B0K1/9ol2r6/EO1ZAIgRnIn2Q4/0WFv9jfKoXiy5mqT+3xTelUg2NS9wK0mRKkw DQYJKoZIhvcNAQELBQADggEBABv7wjfMbeGxT8MLid/m5Zk2maj8I8CqfUjwur9N AJkEup9V/mj09p0oF9zNZqvUlhwn21pnkQsUy0Rw3GtbYELjgUGfToWNOiKfR2mc nrydBClYHdstHfHusY7+FEwDNEe14tc2940qDWurk6kqeVQxFR5ZmeECl+wY0luS rHKy/tHJ2lt/eTguBakMFD+1/ZBAEldj/fOeikWEly+lw9HlAUu7oFMu+edP5+aL zHWov6WEWiHIPdcsAvKb/9kuYEWCJixH3fMt0EU5YKnDdvAJfSFwJQ4MG5dm1IJS TyG3gx6DzR5xPcV+/Ya0UCIffRrOPjO9lWYjweQ8I4wF7vU= -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAwoC/stPpnTJuxzuBXPbR 0f+uaGvaV5v6zBSjws6zKF0L6PZ2aIkMsHkwjswyl36r0Wuc+aeZoHrKGaGVCAa1 ZvBAoqpi37eaSu/xpqQblo2GXxvzetw1cFATwRMGWpHUNPNCl9dO0RGzDlOdsPpE Prw3sunCKrONpiy6w6WLJ95GVUvqacy0an4jBXbY9l1Uqu/8PAsVlvPlvF13Yb5W zJeTfJQcT3Lc5+eF3XKlUYY+xP/RVjGAlcX4AiqWNRH1r94Q0kkY6ve8za6wNtIp rflOSU4plz/guah3Qd1rjHJSUF4Fk7eHJv7sFAanwi8+2LVUK0WbiEVrnZfaJ61c 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 328688852713447676717822593060149068018494 . . . . . . . . [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 2018-10-05 11:01:22 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-01-03 11:01:22 +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 'www4.dumbo.ai.kyutech.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 24553719574008679676077100125876334881694183309650056851890645734187993143940393602746785478273470048742223045138976903301021412004526741863455243116527673622082149673133066242058136359658609733592614585208712641412037010738355897341975038692899489743581430614422173009222310122587872395463406306590505257656170342142033253814365935106827010832325664152912697235666643619089640160745066069116835010129222840793503549633721196289319402492318292984157899695235467768663889343808307688287342719990835614227740276636291175944611397462312830074447239396248686111206388003905572544498252218067845353808362087614589466139831 . . . . . . . . . . . . . . . . . . . . [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) da49a8e9533d5419f948dfd4fa2c747a4571e3bc . . . . . . . . . . . . . . . . [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 (31 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www4.dumbo.ai.kyutech.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 (246 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 1.3.6.1.5.5.7.2.2 (unotice) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:12|false] UTF8String 'This Certificate may only be relied upon by Relying Parties and only in accordance with the Certificate Policy found at https://letsencrypt.org/repository/' . . . . . . . . . . . . . . . . [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 (243 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (240 bytes) 00ee0075005581d4c2169036014aea0b9b573c53f0c0e43878702508172fa3aa1d0713d30c00000166441a8ce100000403004630440220363343aa15fe06de587afa6e1eba0b4db09ee31b9a4827bf0b06a5ae26da57f20220649fe7e42f5d130c923648aca7fa94d7e41dc43e71c45f34a47cf8a2261ef820007500293c519654c83965baaa50fc5807d4b76fbf587a2972dca4c30cf4e54547f47800000166441a8ed30000040300463044022064b8909fbfcd9f983ea5648a19cb03e4e68ddae81d0ad7ff68976afafc43b5640220467227d90e3fd1616ff637caa178b2e66a93fb7c537a5520d8d4bdc0ad2644a9 . . . . [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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