v.im.cyut.edu.tw
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:a6:ff:7c:09:81:cb:a9:81:7d:5a:3c:ea:e6:8d:4f:5a:51 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=v.im.cyut.edu.tw
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 03:a6:ff:7c:09:81:cb:a9:81:7d:5a:3c:ea:e6:8d:4f:5a:51Serial Number (int): 318163327880717286515168294839197784562257
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: 29:09:31:f4:14:55:c1:d4:cc:71:f8:93:f8:1b:82:44:d2:73:75:e0
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): e4:96:75:fc:37:e7:6b:45:df:4b:7f:17:fd:ca:42:e7:18:3a:ce:f5
Fingerprint (sha256): 76:8e:e7:83:32:2e:4c:6e:e1:37:8a:23:35:a4:e6:cd:e8:35:e1:d9:69:72:cb:6d:a6:11:ac:e5:ec:64:78:13
Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/
Revocation information
OCSP Server: http://ocsp.int-x3.letsencrypt.orgCheck the revocation status for certificate v.im.cyut.edu.tw
1
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for v.im.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
v.im.cyut.edu.tw
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Certificate
The complete raw certificate details for v.im.cyut.edu.tw in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIFVzCCBD+gAwIBAgISA6b/fAmBy6mBfVo86uaNT1pRMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xOTA2MTAwNTM3MzlaFw0x OTA5MDgwNTM3MzlaMBsxGTAXBgNVBAMTEHYuaW0uY3l1dC5lZHUudHcwggEiMA0G CSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQCWbCZRTuF+5hTQKDALsPxuEdQnLjCR hyoTgnXebjklNfWHQk0zsaBJg5RAm5kgM7axUOPpI1I2v3QJMbTiEq6dtvODSH9z v6niLUX7aUz/NKBcZa5867eCtmvXUpoEsS3ynCQ2OW28SfBZ7AK/FQumVF6df37p JgLBXUBTs/n6iFrNfu1D/eka4a5riZfaATfEA63YJkLieyhdyTu65oUwcfG1XAyW KzSzCZTOVsUW4n36qVcY4A6Mobd/a5UGL1FtmioGG1YRcZb6R6/yc++62MCrcX7o wdcjoBtJKHuy6HT+/g0rgVwoi4fNB5jEaorz4yT9K11yVXltQFe6WdYlAgMBAAGj ggJkMIICYDAOBgNVHQ8BAf8EBAMCBaAwHQYDVR0lBBYwFAYIKwYBBQUHAwEGCCsG AQUFBwMCMAwGA1UdEwEB/wQCMAAwHQYDVR0OBBYEFCkJMfQUVcHUzHH4k/gbgkTS c3XgMB8GA1UdIwQYMBaAFKhKamMEfd265tE5t6ZFZe/zqOyhMG8GCCsGAQUFBwEB BGMwYTAuBggrBgEFBQcwAYYiaHR0cDovL29jc3AuaW50LXgzLmxldHNlbmNyeXB0 Lm9yZzAvBggrBgEFBQcwAoYjaHR0cDovL2NlcnQuaW50LXgzLmxldHNlbmNyeXB0 Lm9yZy8wGwYDVR0RBBQwEoIQdi5pbS5jeXV0LmVkdS50dzBMBgNVHSAERTBDMAgG BmeBDAECATA3BgsrBgEEAYLfEwEBATAoMCYGCCsGAQUFBwIBFhpodHRwOi8vY3Bz LmxldHNlbmNyeXB0Lm9yZzCCAQMGCisGAQQB1nkCBAIEgfQEgfEA7wB1AG9Tdqwx 8DEZ2JkApFEV/3cVHBHZAsEAKQaNsgiaN9kTAAABa0AbTrsAAAQDAEYwRAIgRfTu 3TecYn0ZzyYw9bwOdHq9Qufh/cZbiaCv1oBlB3oCIBgwh3RR/pOsN5KBpoA1HKoN lq7xL+CZb8AruzFFHXWKAHYAY/Lbzeg7zCzPC3KEJ1drM6SNYXePvXWmOLHHaFRL 2I0AAAFrQBtOtgAABAMARzBFAiEAp9Q3xZvvfE1rSenmvNVRg6b1Yx18dSJ3cq0r tYTNXgUCIEHVgcr9f3aPZh9MvTddsdhdDdlTWqdcxwceh6mGxrWuMA0GCSqGSIb3 DQEBCwUAA4IBAQAhu8J76P6YB3Kv/rTFuynFG5XqW4Dg09rdrwD4oaA9wqL1xUaw rlvllcvFAW4nYMTGaT8rSY4neqQC1oSkNwVdVr2jWbNnt0QUzj3Gd+Gq5lb7dhEs rEHtLdp+oj285xMY2A8ppe5OOlcuCO6I3qgcdhq3Bd28u+dv3NL8MRyC+vw7QmCi oCQwfKPsyyORtgDhcufmESMJFVbdtSNzLrckssRE8qgnUQLmg4xPmANmtIfoi0jh 9ZkIFboyernX7o2XK2KLYrZwiTVF8b1Og1WNGeiwwZnArHetDofFsCPjiYEXOMO4 cyzH5loO8gOzBMtZStCyuEXAHJEbtk7XgcYR -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAlmwmUU7hfuYU0CgwC7D8 bhHUJy4wkYcqE4J13m45JTX1h0JNM7GgSYOUQJuZIDO2sVDj6SNSNr90CTG04hKu nbbzg0h/c7+p4i1F+2lM/zSgXGWufOu3grZr11KaBLEt8pwkNjltvEnwWewCvxUL plRenX9+6SYCwV1AU7P5+ohazX7tQ/3pGuGua4mX2gE3xAOt2CZC4nsoXck7uuaF MHHxtVwMlis0swmUzlbFFuJ9+qlXGOAOjKG3f2uVBi9RbZoqBhtWEXGW+kev8nPv utjAq3F+6MHXI6AbSSh7suh0/v4NK4FcKIuHzQeYxGqK8+Mk/StdclV5bUBXulnW JQIDAQAB -----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 318163327880717286515168294839197784562257 . . . . . . . . [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 2019-06-10 05:37:39 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-09-08 05:37:39 +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 'v.im.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 18989076338869711051756238538920393562145572946264213001065432240618972678173956027474999968373144552298564862445911181234073598651805609603373022182429983874303671183830091177007937872217740288995922008619728141159568200268023320893509180932579272213688386003011797342594606794697702791030179389514096953394878849133734541546244497845798386108988401868208383336467742538208114437952002120968723862632074292415115501526352353646645421666883712003787894339825432601693701281479796562525620586716489478279861103724285918973232111420466966635160913272761127503301955305993845812163367437106341426490199846803058009429541 . . . . . . . . . . . . . . . . . . . . [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) 290931f41455c1d4cc71f893f81b8244d27375e0 . . . . . . . . . . . . . . . . [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 (20 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'v.im.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 (244 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (241 bytes) 00ef0075006f5376ac31f03119d89900a45115ff77151c11d902c10029068db2089a37d9130000016b401b4ebb0000040300463044022045f4eedd379c627d19cf2630f5bc0e747abd42e7e1fdc65b89a0afd68065077a02201830877451fe93ac379281a680351caa0d96aef12fe0996fc02bbb31451d758a00760063f2dbcde83bcc2ccf0b728427576b33a48d61778fbd75a638b1c768544bd88d0000016b401b4eb60000040300473045022100a7d437c59bef7c4d6b49e9e6bcd55183a6f5631d7c75227772ad2bb584cd5e05022041d581cafd7f768f661f4cbd375db1d85d0dd9535aa75cc7071e87a986c6b5ae . . . . [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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