www.mk.ces.kyutech.ac.jp
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:95:4e:11:6d:ee:a0:25:3a:8d:6a:d0:67:81:33:5d:3e:06 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=www.mk.ces.kyutech.ac.jp
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 03:95:4e:11:6d:ee:a0:25:3a:8d:6a:d0:67:81:33:5d:3e:06Serial Number (int): 312142700748906901610830370180260448517638
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: 45:42:b3:85:92:f4:30:30:6e:d4:11:d3:aa:31:6c:b0:02:94:1f:a4
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): a6:c1:0d:d3:cf:ac:a9:7f:f7:09:3c:10:79:1c:af:70:1d:54:4e:dd
Fingerprint (sha256): 01:5f:28:dd:8a:36:26:bd:0e:72:fa:71:bb:1d:1f:31:2d:8c:a3:7a:44:5a:38:73:08:20:c6:e1:12:65:80:0e
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.mk.ces.kyutech.ac.jp
1
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for www.mk.ces.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
www.mk.ces.kyutech.ac.jp
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Certificate
The complete raw certificate details for www.mk.ces.kyutech.ac.jp in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIFaDCCBFCgAwIBAgISA5VOEW3uoCU6jWrQZ4EzXT4GMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xOTEwMDgwNDE2MjZaFw0y MDAxMDYwNDE2MjZaMCMxITAfBgNVBAMTGHd3dy5tay5jZXMua3l1dGVjaC5hYy5q cDCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBALDLFbPQYrb4flVfjRSm k18xSCJ6bssGAWudQeE7dJSNQ8CP0KRCrDr6BmjvZc05dIE/XwjIQ5kJPdT4nF1u jqooUyFXw33ZjYtBrpfPhONNw/4VXzNcVGK91QNLBi+iIuRrKjy6lj30unSZzu05 RTDAiuqYoPzDGOj1kLHtR3l150gHjdx2ovVetQD0Xx2redyrOHgnT8webFMLH5oE EGqvHw1wDyupag03HkHD6cU9ScG6loGTc/5Quryd7T9g1TH66rStt3QOyw+wq0KT jUZxOSF62u8InFnL/6q/3aBZHhWHmzJc4QHrlU9iLfVoVm02B2Ols1ODFbqNQzYj cykCAwEAAaOCAm0wggJpMA4GA1UdDwEB/wQEAwIFoDAdBgNVHSUEFjAUBggrBgEF BQcDAQYIKwYBBQUHAwIwDAYDVR0TAQH/BAIwADAdBgNVHQ4EFgQURUKzhZL0MDBu 1BHTqjFssAKUH6QwHwYDVR0jBBgwFoAUqEpqYwR93brm0Tm3pkVl7/Oo7KEwbwYI KwYBBQUHAQEEYzBhMC4GCCsGAQUFBzABhiJodHRwOi8vb2NzcC5pbnQteDMubGV0 c2VuY3J5cHQub3JnMC8GCCsGAQUFBzAChiNodHRwOi8vY2VydC5pbnQteDMubGV0 c2VuY3J5cHQub3JnLzAjBgNVHREEHDAaghh3d3cubWsuY2VzLmt5dXRlY2guYWMu anAwTAYDVR0gBEUwQzAIBgZngQwBAgEwNwYLKwYBBAGC3xMBAQEwKDAmBggrBgEF BQcCARYaaHR0cDovL2Nwcy5sZXRzZW5jcnlwdC5vcmcwggEEBgorBgEEAdZ5AgQC BIH1BIHyAPAAdwDwlaRZ8gDRgkAQLS+TiI6tS/4dR+OZ4dA0prCoqo6ycwAAAW2p zBKmAAAEAwBIMEYCIQD4yErCY4IijUw4ZXCx5uJsPRZUR7IVXlt86DkHxyLeBQIh AOMU9B1KM2khvOOqSbirfUfWnzirwSbJziaQA53BLcvuAHUAKTxRllTIOWW6qlD8 WAfUt2+/WHopctykwwz05UVH9HgAAAFtqcwSnAAABAMARjBEAiAyiHJCbAT0/84a U4MysWkoerTfkwF+Ok9w7uZ4RQKsQgIgOiGCK486kmvqSxjCAmOQxnZVJ0SmjA1h dqJ5x87/n+gwDQYJKoZIhvcNAQELBQADggEBACPua+O9u3bOI8DKNFL7NrYN82aG Bm1h7Xm/mE6pOtDOtGveF239VqDh4ZCv2EtDLcKo225rKlp3fU9DRkeXbtk1SOcj SHXmykZJhCdflu5dJRfLS43y2fqzeruGBdwwMRJTsTJYcLdJaaeNnuRSein8IM/M RXRGQUuK5RRjbvVr/OYe3/FhqyJ9E531BjXbw0kRQQQ/3C4iA03ZSZZPZh8cSdKE DYrGhkmCQyM0qMcDSUSMPUAW0INhNVeHj5vAOomwd2ofvclrbeRSAcEUAV5nlMcw gwXIG7Lz8Wyc4HHjxSK0clQAfcRV9LZoqC14VDJWwfbmfNVgEO+Kk0OXDVE= -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAsMsVs9Bitvh+VV+NFKaT XzFIInpuywYBa51B4Tt0lI1DwI/QpEKsOvoGaO9lzTl0gT9fCMhDmQk91PicXW6O qihTIVfDfdmNi0Gul8+E403D/hVfM1xUYr3VA0sGL6Ii5GsqPLqWPfS6dJnO7TlF MMCK6pig/MMY6PWQse1HeXXnSAeN3Hai9V61APRfHat53Ks4eCdPzB5sUwsfmgQQ aq8fDXAPK6lqDTceQcPpxT1JwbqWgZNz/lC6vJ3tP2DVMfrqtK23dA7LD7CrQpON RnE5IXra7wicWcv/qr/doFkeFYebMlzhAeuVT2It9WhWbTYHY6WzU4MVuo1DNiNz KQIDAQAB -----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 312142700748906901610830370180260448517638 . . . . . . . . [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 2019-10-08 04:16:26 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-01-06 04:16:26 +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.mk.ces.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 22318086509024969756296847243191515628866691646400638223515052669690359065224992198683445453951777642059634875770557786699517418844565980945441130473579699388991936885552236463221960502955803813242161745555846265778208079336792449836713532386784057085810046943459572753676909876854436811063976026293061020787042975796721201520090575153822429381414183203775152889615462354895572491554259977778108016844547815445553165932043860086413246586344915061540807175128737319284294867642881515356392219082243610706054434948720466065736816955265400740087368305839483293196876933651109258782220119371687804262029851272441254605609 . . . . . . . . . . . . . . . . . . . . [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) 4542b38592f430306ed411d3aa316cb002941fa4 . . . . . . . . . . . . . . . . [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 (28 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.mk.ces.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 (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) 00f0007700f095a459f200d18240102d2f93888ead4bfe1d47e399e1d034a6b0a8aa8eb2730000016da9cc12a60000040300483046022100f8c84ac26382228d4c386570b1e6e26c3d165447b2155e5b7ce83907c722de05022100e314f41d4a336921bce3aa49b8ab7d47d69f38abc126c9ce2690039dc12dcbee007500293c519654c83965baaa50fc5807d4b76fbf587a2972dca4c30cf4e54547f4780000016da9cc129c00000403004630440220328872426c04f4ffce1a538332b169287ab4df93017e3a4f70eee6784502ac4202203a21822b8f3a926bea4b18c2026390c676552744a68c0d6176a279c7ceff9fe8 . . . . [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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