dywang.csie.cyut.edu.tw
Issued by R3
About this certificate
This digital certificate with serial number 04:50:ff:80:41:ab:03:78:36:69:af:9a:56:73:d7:e4:3a:b8 was issued on by Let's Encrypt.
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We have idenified some issues with this certificate:
- DV certificate contains a subject common name, this is not recommended. If certificate policy 2.23.140.1.2.1 (CA/B BR domain validated) is included, only country and/or common name is allowed in SubjectDN. (BRs: 7.1.2.7.2)
- Subscriber certificates use of Subject Key Identifier is NOT RECOMMENDED (BRs v2: 7.1.2.7.6)
- Subscriber Certificate: commonName is NOT RECOMMENDED. (BRs: 7.1.2.7.1)
Certificate Subject
CN=dywang.csie.cyut.edu.tw
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 04:50:ff:80:41:ab:03:78:36:69:af:9a:56:73:d7:e4:3a:b8Serial Number (int): 376011352165544823479475438108207160244920
Serial Number lenght: 139 bits, 18 octets
SubjectKeyId: 53:2a:71:d8:4a:ca:9b:d0:b1:29:43:47:4d:11:d0:5a:d8:af:47:90
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6
Fingerprint (sha1): 51:d1:be:86:ae:8e:ed:b8:28:f1:2c:00:33:6f:02:48:74:67:bc:fa
Fingerprint (sha256): 07:5f:84:fb:68:f7:cd:2a:d6:41:ce:85:1b:40:34:f8:3c:53:26:a6:7b:14:a0:2e:ff:8f:3a:91:9c:93:74:79
Issuing Certificate URL: http://r3.i.lencr.org/
Revocation information
OCSP Server: http://r3.o.lencr.orgCheck the revocation status for certificate dywang.csie.cyut.edu.tw
1
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for dywang.csie.cyut.edu.tw
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
dywang.csie.cyut.edu.tw
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Certificate
The complete raw certificate details for dywang.csie.cyut.edu.tw in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIE+zCCA+OgAwIBAgISBFD/gEGrA3g2aa+aVnPX5Dq4MA0GCSqGSIb3DQEBCwUA MDIxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MQswCQYDVQQD EwJSMzAeFw0yMzExMDcxNTAxMzBaFw0yNDAyMDUxNTAxMjlaMCIxIDAeBgNVBAMT F2R5d2FuZy5jc2llLmN5dXQuZWR1LnR3MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8A MIIBCgKCAQEAn2EY6JC2wHIwix7d8R6IOxY06uLHOlZPXbpZNEXF9PsjVimclTnT o2KOmV7kOKWb36HqkfADFeqPGJELuuEfRuYgFTrB3uRomrhtUmGEFt/FUz/tUoV1 5xkkEbeZT6gBLgKGxCAuLNrsuQaHXwQ4HTSkE+MvzrmJsdrsEbhSj88n6y198V/D DWkVmhJ7B+RQW9NcG9CRzQu+SNEBCpso+5tF38Cb6rHjkTFzBmTw/OWa9xae88eq /YnB/b0n/QtQ7//JhBc+wYFBiNj7OYRF9o7y5mA2WfT0iTb6bWEvrt3SLqe8AIAU N2suuxawxjLKyN1gsu8tKO69w11NCBf1oQIDAQABo4ICGTCCAhUwDgYDVR0PAQH/ BAQDAgWgMB0GA1UdJQQWMBQGCCsGAQUFBwMBBggrBgEFBQcDAjAMBgNVHRMBAf8E AjAAMB0GA1UdDgQWBBRTKnHYSsqb0LEpQ0dNEdBa2K9HkDAfBgNVHSMEGDAWgBQU LrMXt1hWy65QCUDmH6+dixTCxjBVBggrBgEFBQcBAQRJMEcwIQYIKwYBBQUHMAGG FWh0dHA6Ly9yMy5vLmxlbmNyLm9yZzAiBggrBgEFBQcwAoYWaHR0cDovL3IzLmku bGVuY3Iub3JnLzAiBgNVHREEGzAZghdkeXdhbmcuY3NpZS5jeXV0LmVkdS50dzAT BgNVHSAEDDAKMAgGBmeBDAECATCCAQQGCisGAQQB1nkCBAIEgfUEgfIA8AB2AEiw 42vapkc0D+VqAvqdMOscUgHLVt0sgdm7v6s52IRzAAABi6qEeY4AAAQDAEcwRQIh AJhz2CWOd7EPzfvar+OnWRuRrkwtjoaC6JN5+Tpp054HAiBL3ZijWGYm9jPjqwgL vB3IvN9MvmxNT9H+QWuEXYR2cgB2ADtTd3U+LbmAToswWwb+QDtn2E/D9Me9AA0t cm/h+tQXAAABi6qEeZoAAAQDAEcwRQIhAIbZKLu4LqIRDbkoTqX9eYTx7tXDUDln /fTUDfUSoDT+AiAiCEVZc4yrG0XHOL+p11DOX4PDiHdS5kIv01E0bIh7wzANBgkq hkiG9w0BAQsFAAOCAQEAkoppli9mzvkqBMNvY8jOsJ0QVuF1ooln5HOkZN6jn3Ez kB7Kp41PK8HDxjVuK0EZnVadNHlWu1xoBOzDGpOzs6dup5nGex4VzKglW2DhcS9D iuRC5CgSwEYKr7cdhH2ROvuiK2kaxrf1EXdJKAOHLdPeDkuMVBAsDKflsNavRNC1 RGfKM3YaaiSZvwpDTNWCfjXg/SXrFcBvAf6R5lDme+939lo4yDGEvvFGvBqDm/Mo nwWn9jgDfqd1iNkOHwqbRV0KcIAndRFPWyRtcnu7qMsJFT9t52iQ+rZufg207SoP OSvMrPMY8oaxiAgZCs6arb4/xLCFeGG/s+2raA+Fig== -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAn2EY6JC2wHIwix7d8R6I OxY06uLHOlZPXbpZNEXF9PsjVimclTnTo2KOmV7kOKWb36HqkfADFeqPGJELuuEf RuYgFTrB3uRomrhtUmGEFt/FUz/tUoV15xkkEbeZT6gBLgKGxCAuLNrsuQaHXwQ4 HTSkE+MvzrmJsdrsEbhSj88n6y198V/DDWkVmhJ7B+RQW9NcG9CRzQu+SNEBCpso +5tF38Cb6rHjkTFzBmTw/OWa9xae88eq/YnB/b0n/QtQ7//JhBc+wYFBiNj7OYRF 9o7y5mA2WfT0iTb6bWEvrt3SLqe8AIAUN2suuxawxjLKyN1gsu8tKO69w11NCBf1 oQIDAQAB -----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 376011352165544823479475438108207160244920 . . . . . . . . [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 'R3' . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2023-11-07 15:01:30 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-02-05 15:01:29 +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 'dywang.csie.cyut.edu.tw' . . . . . . . . [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 20119770952104151200771155650100547992687357312981205786046392865702405237110103652016202105207358260854060970428601513954174131815656396618516785047532892416373328497444800058862125682396492803192397998242313412724930028583763290180148404171066946182716958238518006720767589284141000799734994892012203078178846521114320987646228935625847094609323170781661729738834737381337845132691714697339780703929423662589301321599859880345378162365738734545381405901602922173979434280527299800063332619713757663370890886727663332730957030793570750123342973547899781608743121116081136972625073593556722058429948742435147670353313 . . . . . . . . . . . . . . . . . . . . [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) 532a71d84aca9bd0b12943474d11d05ad8af4790 . . . . . . . . . . . . . . . . [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 142eb317b75856cbae500940e61faf9d8b14c2c6 . . . . . . . . . . . . . . . . [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 (73 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://r3.o.lencr.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://r3.i.lencr.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 (27 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'dywang.csie.cyut.edu.tw' . . . . . . . . . . . . . . . . [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 (12 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 1.3.6.1.4.1.11129.2.4.2 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (245 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (242 bytes) 00f000760048b0e36bdaa647340fe56a02fa9d30eb1c5201cb56dd2c81d9bbbfab39d884730000018baa84798e00000403004730450221009873d8258e77b10fcdfbdaafe3a7591b91ae4c2d8e8682e89379f93a69d39e0702204bdd98a3586626f633e3ab080bbc1dc8bcdf4cbe6c4d4fd1fe416b845d8476720076003b5377753e2db9804e8b305b06fe403b67d84fc3f4c7bd000d2d726fe1fad4170000018baa84799a000004030047304502210086d928bbb82ea2110db9284ea5fd7984f1eed5c3503967fdf4d40df512a034fe022022084559738cab1b45c738bfa9d750ce5f83c3887752e6422fd351346c887bc3 . . . . [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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