general2.cyut.edu.tw
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:38:3c:bd:fd:69:50:68:61:f3:80:b6:fd:e0:0b:81:d2:82 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=general2.cyut.edu.tw
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 03:38:3c:bd:fd:69:50:68:61:f3:80:b6:fd:e0:0b:81:d2:82Serial Number (int): 280473410506500123708119399971997222032002
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: c3:f6:c7:77:76:7e:f7:ff:e1:a1:bd:30:bb:71:5b:06:10:4d:47:57
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): 30:dd:32:ba:8b:9a:0d:59:67:ae:d6:99:f6:46:13:78:fe:95:fa:7d
Fingerprint (sha256): 36:04:3c:91:55:4a:b8:61:1f:61:5f:1b:70:08:8a:e4:29:eb:d3:46:1b:85:e3:c5:df:bb:8a:d3:d7:ac:fc:d5
Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/
Revocation information
OCSP Server: http://ocsp.int-x3.letsencrypt.orgCheck the revocation status for certificate general2.cyut.edu.tw
2
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for general2.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
general2.cyut.edu.tw
plant.cyut.edu.tw
plant.cyut.edu.tw
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Certificate
The complete raw certificate details for general2.cyut.edu.tw in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIFczCCBFugAwIBAgISAzg8vf1pUGhh84C2/eALgdKCMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0yMDAyMDIxNTMzNDRaFw0y MDA1MDIxNTMzNDRaMB8xHTAbBgNVBAMTFGdlbmVyYWwyLmN5dXQuZWR1LnR3MIIB IjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAuBnlEZmS69nG+PG8Ewd/s6sf 46on3CsgbfnM4Fv6XNr0UX9gbu773GwL/450H1oqSvUV+j2nWZDhLc94e67g6rGV pdKIQ4142dKuCK1mZwyE2voqaplGucMQPPB6scLyCeOBFoh7JbqV0gPn9Mdw8VpJ GhR1xhmcF7Nyxrzm2sng2GK6G9H4240I7LP3slzrLJhDQYirGNLRvQCfyrYa6WFw /kGfj6N6gt7/MWU7hlpMHxHqKEx47xtLZRmdG9sB+kGLj8Yq/rH7FdQ+Wu5TpxVp ygJ9xsV7mUq638YtI49KPy3eu7Crcz9rzEzH10tqktrXN9vwWN8Zvvk/7VVNFwID AQABo4ICfDCCAngwDgYDVR0PAQH/BAQDAgWgMB0GA1UdJQQWMBQGCCsGAQUFBwMB BggrBgEFBQcDAjAMBgNVHRMBAf8EAjAAMB0GA1UdDgQWBBTD9sd3dn73/+GhvTC7 cVsGEE1HVzAfBgNVHSMEGDAWgBSoSmpjBH3duubRObemRWXv86jsoTBvBggrBgEF BQcBAQRjMGEwLgYIKwYBBQUHMAGGImh0dHA6Ly9vY3NwLmludC14My5sZXRzZW5j cnlwdC5vcmcwLwYIKwYBBQUHMAKGI2h0dHA6Ly9jZXJ0LmludC14My5sZXRzZW5j cnlwdC5vcmcvMDIGA1UdEQQrMCmCFGdlbmVyYWwyLmN5dXQuZWR1LnR3ghFwbGFu dC5jeXV0LmVkdS50dzBMBgNVHSAERTBDMAgGBmeBDAECATA3BgsrBgEEAYLfEwEB ATAoMCYGCCsGAQUFBwIBFhpodHRwOi8vY3BzLmxldHNlbmNyeXB0Lm9yZzCCAQQG CisGAQQB1nkCBAIEgfUEgfIA8AB2AAe3XBvlfWj/8bDGHSMVx7rmV3xXlLdq7rxh Ohpp06IcAAABcAbANOQAAAQDAEcwRQIhAK7WIp1SGAYYDg9F9uO+suAkAHIP6cfh v56d3YJs+feWAiAsMiGgOBIDkq3Gyvg6ekwVFqU1KphudEr5SelV634KeQB2AG9T dqwx8DEZ2JkApFEV/3cVHBHZAsEAKQaNsgiaN9kTAAABcAbANYsAAAQDAEcwRQIg M2KyWZS6NIlUgky2VcYo45dvJwUP227XP5CrF4wU+4QCIQC74PKqu9vipMtYv/SV EXlXaSKmB7IMKdsSSr5gmV5AijANBgkqhkiG9w0BAQsFAAOCAQEAPlQKtCZnIZy5 5X2fZ1zWFnrXiA6KCX9zABittVFcoOxQDdeUiMjKw1MRoNxwEbBKBaQFI7Kh/0it blK4jFAcJfSsNDnMOEZoior1YEi1pPAVroNYtaHN9CT/5vubdL10naeBNlWqkWcu 5g8SGkBA9m+NbFRblleKNOjuSyuqNgH44C+r2ivacVFRTVcj4j+St47OZFqF+gcQ qiOe2Xd43cSvqcJ58X0K1U0Z1c/po1Fa39e59WA65f8AG/hRXyxLKuhPeYfabKlD yFrWH4odtet+Fu+Nzy7diZiWwn2LdW7O9xjyHO3nhEsPrhVfI6ZxYet5Jx++7h6V faz2HTDXgw== -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAuBnlEZmS69nG+PG8Ewd/ s6sf46on3CsgbfnM4Fv6XNr0UX9gbu773GwL/450H1oqSvUV+j2nWZDhLc94e67g 6rGVpdKIQ4142dKuCK1mZwyE2voqaplGucMQPPB6scLyCeOBFoh7JbqV0gPn9Mdw 8VpJGhR1xhmcF7Nyxrzm2sng2GK6G9H4240I7LP3slzrLJhDQYirGNLRvQCfyrYa 6WFw/kGfj6N6gt7/MWU7hlpMHxHqKEx47xtLZRmdG9sB+kGLj8Yq/rH7FdQ+Wu5T pxVpygJ9xsV7mUq638YtI49KPy3eu7Crcz9rzEzH10tqktrXN9vwWN8Zvvk/7VVN FwIDAQAB -----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 280473410506500123708119399971997222032002 . . . . . . . . [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 2020-02-02 15:33:44 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-05-02 15:33:44 +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 'general2.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 23240617315452375850150914235299681364324852491332471034311479094132126807587307406438845086544371055259554886584606027343716820426791175489635438321157802327289591053859751289383966164606680885039782384013423368840960234918230002721094486449536514961711745805248384668701712756698246379493420462735676201116491663983316927885997548956079956755841439859891957146687266432366308166368808064912664042193101565935605608010082097439796209975923937119689238609993303017951774037869016825187799630592100368019769231562528201707461992725784022152607029328225700772189380274780420779207137772874840017959490240872817406332183 . . . . . . . . . . . . . . . . . . . . [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) c3f6c777767ef7ffe1a1bd30bb715b06104d4757 . . . . . . . . . . . . . . . . [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 (43 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'general2.cyut.edu.tw' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'plant.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 (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) 00f000760007b75c1be57d68fff1b0c61d2315c7bae6577c5794b76aeebc613a1a69d3a21c0000017006c034e40000040300473045022100aed6229d521806180e0f45f6e3beb2e02400720fe9c7e1bf9e9ddd826cf9f79602202c3221a038120392adc6caf83a7a4c1516a5352a986e744af949e955eb7e0a790076006f5376ac31f03119d89900a45115ff77151c11d902c10029068db2089a37d9130000017006c0358b000004030047304502203362b25994ba348954824cb655c628e3976f27050fdb6ed73f90ab178c14fb84022100bbe0f2aabbdbe2a4cb58bff4951179576922a607b20c29db124abe60995e408a . . . . [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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