ait.csie.cyut.edu.tw
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:52:47:56:6b:ad:9f:66:bd:82:8e:c6:e6:73:b9:80:db:75 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=ait.csie.cyut.edu.tw
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 03:52:47:56:6b:ad:9f:66:bd:82:8e:c6:e6:73:b9:80:db:75Serial Number (int): 289334835792001888993647930720837917793141
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: d8:21:5d:6b:5c:0e:76:0f:14:ba:ce:aa:f5:ab:c8:2d:c8:8b:3b:bc
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): 88:fa:1f:c2:62:ed:ab:84:02:f5:b6:5d:9d:d0:31:9a:e0:57:1e:c7
Fingerprint (sha256): 57:0c:ca:e8:71:b9:91:a6:32:2b:50:07:2a:d4:a0:0a:f3:ab:0c:72:e8:29:89:4f:84:9a:2f:9f:d5:29:30:66
Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/
Revocation information
OCSP Server: http://ocsp.int-x3.letsencrypt.orgCheck the revocation status for certificate ait.csie.cyut.edu.tw
1
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for ait.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
ait.csie.cyut.edu.tw
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Certificate
The complete raw certificate details for ait.csie.cyut.edu.tw in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIFYTCCBEmgAwIBAgISA1JHVmutn2a9go7G5nO5gNt1MA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0yMDAzMjcxNTA2MzZaFw0y MDA2MjUxNTA2MzZaMB8xHTAbBgNVBAMTFGFpdC5jc2llLmN5dXQuZWR1LnR3MIIB IjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA4pM51Fwus3Lr/QYLJ3vGIztV sDtK5qH8luI3yKimpqAywvQysyvOKmZOnoMTkwuGndJlPbQ756/iwfbSbP2KWFVj radMxxzDEqMfvM63X5UQMqtv6+0QUSzJ5VYzfjK3v6SBlMPfjTrg7L+XHQBCAFfb m2Wit5xaLnr2HSGnMm8daP94yK64XNEkKxTYKhnosdKxROLm042IrVvcUmevRm0Y PZOixZrCnq1HZYYkJI2OBsBqNvzaweN5t3NV9LNghUiG2aG+ucJIpZeePvX76+sH USlvpyivbll2JJqwTkhYV9WQqn/S7cOAme/paiYawRTsKBuVurYwRzrWGpw4gQID AQABo4ICajCCAmYwDgYDVR0PAQH/BAQDAgWgMB0GA1UdJQQWMBQGCCsGAQUFBwMB BggrBgEFBQcDAjAMBgNVHRMBAf8EAjAAMB0GA1UdDgQWBBTYIV1rXA52DxS6zqr1 q8gtyIs7vDAfBgNVHSMEGDAWgBSoSmpjBH3duubRObemRWXv86jsoTBvBggrBgEF BQcBAQRjMGEwLgYIKwYBBQUHMAGGImh0dHA6Ly9vY3NwLmludC14My5sZXRzZW5j cnlwdC5vcmcwLwYIKwYBBQUHMAKGI2h0dHA6Ly9jZXJ0LmludC14My5sZXRzZW5j cnlwdC5vcmcvMB8GA1UdEQQYMBaCFGFpdC5jc2llLmN5dXQuZWR1LnR3MEwGA1Ud IARFMEMwCAYGZ4EMAQIBMDcGCysGAQQBgt8TAQEBMCgwJgYIKwYBBQUHAgEWGmh0 dHA6Ly9jcHMubGV0c2VuY3J5cHQub3JnMIIBBQYKKwYBBAHWeQIEAgSB9gSB8wDx AHcA8JWkWfIA0YJAEC0vk4iOrUv+HUfjmeHQNKawqKqOsnMAAAFxHL7F9wAABAMA SDBGAiEA1/ZOgy454HUF2YKv5/PNaf8VqO4wLRIQW+mtfmvhjpECIQDpfi5R7LE2 AIMLfDAc7TCBfHJn6PT/mGMx3mCo8JxJ+AB2AAe3XBvlfWj/8bDGHSMVx7rmV3xX lLdq7rxhOhpp06IcAAABcRy+xiIAAAQDAEcwRQIgWqKtM8KmnNWvdlIH0BbHaH/4 zguubzKZzewBnVcU+/0CIQDuCtxKlwDl7A7XvBfMNx1SErvE5IkQjy+ueFpUcEFv gzANBgkqhkiG9w0BAQsFAAOCAQEAJkJ+96wFntoIryii8qnx/KdkRKPfcmp9IvsB KTK7Gpc0MlDyw0ln54ByE29/BGZqf5Oj9mJFnKJPcjok5jGeiysRLGHmwon30CI1 798Njnz374zIP1Ck0PXlDqlebrXyiZMK87Fy8BY8AKvbra5Mx2EIrdoAoyfU16KD NlWs3COoDhBvPgdODTfuC6Y8aOBM2HplLr1rRRTUTS6Dg1ZpO7A/+0gujMwRUXis 9kGOl993+NZjnrvHPXZhctxOtLtksVxwAz7KkGpY6VOd5YCb2zSY/OuQD5ySQtPg FKjHipciLr/n+nBRORWlgjjHp5Wo6ODCBe5nfu2XjW5+BG+tng== -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA4pM51Fwus3Lr/QYLJ3vG IztVsDtK5qH8luI3yKimpqAywvQysyvOKmZOnoMTkwuGndJlPbQ756/iwfbSbP2K WFVjradMxxzDEqMfvM63X5UQMqtv6+0QUSzJ5VYzfjK3v6SBlMPfjTrg7L+XHQBC AFfbm2Wit5xaLnr2HSGnMm8daP94yK64XNEkKxTYKhnosdKxROLm042IrVvcUmev Rm0YPZOixZrCnq1HZYYkJI2OBsBqNvzaweN5t3NV9LNghUiG2aG+ucJIpZeePvX7 6+sHUSlvpyivbll2JJqwTkhYV9WQqn/S7cOAme/paiYawRTsKBuVurYwRzrWGpw4 gQIDAQAB -----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 289334835792001888993647930720837917793141 . . . . . . . . [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 2020-03-27 15:06:36 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-06-25 15:06:36 +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 'ait.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 28602456717777977531302987055795837572148806755757741413361723917889243921137813102583742384737768861283595004893850169936207251108819413675608390154594170173690422933002557494216477463318400029846544483352853047124657237303837560953345958931632950709887002789305571366261370705055524946265203589051827193149671133412581542794831581705912254743461915192416020442522222396524535367167598343989076178587243246282614284991416195132584434105037894040546110292450441829870473155348987449522312993645752087167498911243568453883196560756494675454461309305305659917700193435552033817053745768961334637021893053235885065910401 . . . . . . . . . . . . . . . . . . . . [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) d8215d6b5c0e760f14baceaaf5abc82dc88b3bbc . . . . . . . . . . . . . . . . [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 (24 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'ait.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 (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 (246 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (243 bytes) 00f1007700f095a459f200d18240102d2f93888ead4bfe1d47e399e1d034a6b0a8aa8eb273000001711cbec5f70000040300483046022100d7f64e832e39e07505d982afe7f3cd69ff15a8ee302d12105be9ad7e6be18e91022100e97e2e51ecb13600830b7c301ced30817c7267e8f4ff986331de60a8f09c49f800760007b75c1be57d68fff1b0c61d2315c7bae6577c5794b76aeebc613a1a69d3a21c000001711cbec622000004030047304502205aa2ad33c2a69cd5af765207d016c7687ff8ce0bae6f3299cdec019d5714fbfd022100ee0adc4a9700e5ec0ed7bc17cc371d5212bbc4e489108f2fae785a5470416f83 . . . . [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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