v.im.cyut.edu.tw
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:92:aa:6c:b3:fd:9a:99:4a:e4:84:08:99:2d:92:df:24:e5 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): 03:92:aa:6c:b3:fd:9a:99:4a:e4:84:08:99:2d:92:df:24:e5Serial Number (int): 311244616543725803245893182566852666008805
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: 4e:21:79:bb:b0:4c:b1:52:35:e6:8e:7f:49:32:08:38:f2:d1:27:48
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): 40:a2:d4:5b:7e:4e:94:dc:89:ef:16:ee:83:e7:71:3c:e3:36:c8:e0
Fingerprint (sha256): 67:65:67:9a:e7:fe:1b:8f:df:0b:ea:c4:86:61:42:6a:e3:0c:84:c1:7c:54:2a:9f:70:82:80:eb:a9:f2:30:c3
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+gAwIBAgISA5KqbLP9mplK5IQImS2S3yTlMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xODEyMTAxNTQzMDVaFw0x OTAzMTAxNTQzMDVaMBsxGTAXBgNVBAMTEHYuaW0uY3l1dC5lZHUudHcwggEiMA0G CSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQCh7/St/jzqKO8SlH7eUPWXaMKd7MwD circ3rcB+SViWW+YhNQ8mJ+Uu2uxIpzo/8Xi6Azu5cZibvVunoq6DBKmdDxEveAq Jtcanit38QdrMfpeXl6EyKOQeDiUmqLOscp+nWg1DzpDvmKhMXI6A6strqMA2JSF c/P5RTEakoyxxl7ZpQNgT7HzmmAi7+IQku83wiTrGkM99NtaCTTzsA+HCEh66WSd LHqwsfPA0i7xctMOFzvXQW1SiaDR2sVERfd4FSwmBFZL4oGNT802oY6iYOr6nptG r7xSpiNrdnI8L2O5q9irirASYd2B9zPdlcBnWl/Y2gBan8xtJ+C/vyCDAgMBAAGj ggJkMIICYDAOBgNVHQ8BAf8EBAMCBaAwHQYDVR0lBBYwFAYIKwYBBQUHAwEGCCsG AQUFBwMCMAwGA1UdEwEB/wQCMAAwHQYDVR0OBBYEFE4hebuwTLFSNeaOf0kyCDjy 0SdIMB8GA1UdIwQYMBaAFKhKamMEfd265tE5t6ZFZe/zqOyhMG8GCCsGAQUFBwEB BGMwYTAuBggrBgEFBQcwAYYiaHR0cDovL29jc3AuaW50LXgzLmxldHNlbmNyeXB0 Lm9yZzAvBggrBgEFBQcwAoYjaHR0cDovL2NlcnQuaW50LXgzLmxldHNlbmNyeXB0 Lm9yZy8wGwYDVR0RBBQwEoIQdi5pbS5jeXV0LmVkdS50dzBMBgNVHSAERTBDMAgG BmeBDAECATA3BgsrBgEEAYLfEwEBATAoMCYGCCsGAQUFBwIBFhpodHRwOi8vY3Bz LmxldHNlbmNyeXB0Lm9yZzCCAQMGCisGAQQB1nkCBAIEgfQEgfEA7wB1AOJpS64m 6OlACeiGG7Y7g9Q+5/50iPukjyiTAZ3d8dv+AAABZ5kAMUYAAAQDAEYwRAIgJWpZ QtrRctg6Gdrg+x8FYc9hNl6Zd76uZC+IqYmW8ZICIGp4Nmvgk7ZIQfmazzEO/Jbb X2L0rx8rpq22DOI4a9NwAHYAKTxRllTIOWW6qlD8WAfUt2+/WHopctykwwz05UVH 9HgAAAFnmQAxjwAABAMARzBFAiEA6ztlpbH5St57v7dwYc9FpcpqulzEa3/iR6Gm JwoDEXkCIDg/lPX5gohQKlFvlxVUQFwQ77rX1zMAWd2UtlG2pHX6MA0GCSqGSIb3 DQEBCwUAA4IBAQBfLtkdxfezzobdsSC2TL1YIKN9YKT5Ch3+2ZJsWN/ayb84jRxR y1nYWk6dHNlMipe52dcWK4TJnIOc1GHPENxecDNNHbStCl5Q+Q3GyksSABNtwdM3 TzAU/oMXpSJz2KjSTvQWdxNsT5s2ha1QilyV2e95CIGnvrW3LL6yjYa7mS049Myz yLptfhyXAWvmzDeNk1vwSzKXa7fysykkOyBCjax6PIwhaXAqr6nZcUqMd+LKvXgJ zxEJcBbtBzaFEz9GYSejeRQDtfIaiLghIA+4wNiOxFmC3cnWBiBpFSrxWb0Tuw5p MVFutvf7V+yNvzAv2CyJ0XrVngwd9rRdLCaj -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAoe/0rf486ijvEpR+3lD1 l2jCnezMA3Iq3N63AfklYllvmITUPJiflLtrsSKc6P/F4ugM7uXGYm71bp6KugwS pnQ8RL3gKibXGp4rd/EHazH6Xl5ehMijkHg4lJqizrHKfp1oNQ86Q75ioTFyOgOr La6jANiUhXPz+UUxGpKMscZe2aUDYE+x85pgIu/iEJLvN8Ik6xpDPfTbWgk087AP hwhIeulknSx6sLHzwNIu8XLTDhc710FtUomg0drFREX3eBUsJgRWS+KBjU/NNqGO omDq+p6bRq+8UqYja3ZyPC9juavYq4qwEmHdgfcz3ZXAZ1pf2NoAWp/MbSfgv78g gwIDAQAB -----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 311244616543725803245893182566852666008805 . . . . . . . . [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 2018-12-10 15:43:05 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-03-10 15:43:05 +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 20442693704709065110170033089211571793699873324428366891662959372265741562580014624318137961178653920078634283130031927787162686750742789607418236932392925046777137046914034767262244239020696162161064630370646771614118651109466273221707862524968829293282921381996877534915320150054178514949361168612281830189726614088939013046290779380945503152237961994592638831387316892242385091791675992337438464672691596142953383115064772857169443650180895175471267917368534620600564179139261983924065139095929719184925943767531415095838422895724240023032511774775403246681541964629898215399171999773327601371445187847853237543043 . . . . . . . . . . . . . . . . . . . . [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) 4e2179bbb04cb15235e68e7f49320838f2d12748 . . . . . . . . . . . . . . . . [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) 00ef007500e2694bae26e8e94009e8861bb63b83d43ee7fe7488fba48f2893019dddf1dbfe000001679900314600000403004630440220256a5942dad172d83a19dae0fb1f0561cf61365e9977beae642f88a98996f19202206a78366be093b64841f99acf310efc96db5f62f4af1f2ba6adb60ce2386bd370007600293c519654c83965baaa50fc5807d4b76fbf587a2972dca4c30cf4e54547f478000001679900318f0000040300473045022100eb3b65a5b1f94ade7bbfb77061cf45a5ca6aba5cc46b7fe247a1a6270a0311790220383f94f5f98288502a516f971554405c10efbad7d7330059dd94b651b6a475fa . . . . [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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