courseworks2.columbia.edu
Issued by R3
About this certificate
This digital certificate with serial number 03:d9:44:e7:16:02:cd:51:25:a3:01:0a:7d:24:5f:46:df:dd was issued on by Let's Encrypt.
This certificate is currently not expired, we haven't checked the revocation status of this certificate but you can do this simply on revocationcheck.com. 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:
- 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=courseworks2.columbia.edu
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate will expire on
Certificate Details
Serial Number (hex): 03:d9:44:e7:16:02:cd:51:25:a3:01:0a:7d:24:5f:46:df:ddSerial Number (int): 335269718787847092469068134431251654696925
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: a2:63:3c:fb:fa:e5:06:22:63:1d:f7:6b:f6:4d:80:fe:ce:d3:a4:9f
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6
Fingerprint (sha1): 74:00:7f:e6:4b:3a:6c:43:bb:3f:f4:84:11:63:fb:d1:5b:38:e9:09
Fingerprint (sha256): 00:5d:f1:14:9a:00:9c:e3:0d:77:9a:95:1b:4c:dc:3c:b7:9f:b7:72:50:d1:4e:8c:ef:48:a7:84:c9:bc:ca:bc
Issuing Certificate URL: http://r3.i.lencr.org/
Revocation information
OCSP Server: http://r3.o.lencr.orgCheck the revocation status for certificate courseworks2.columbia.edu
1
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for courseworks2.columbia.edu
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
courseworks2.columbia.edu
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Certificate
The complete raw certificate details for courseworks2.columbia.edu in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIE/zCCA+egAwIBAgISA9lE5xYCzVElowEKfSRfRt/dMA0GCSqGSIb3DQEBCwUA MDIxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MQswCQYDVQQD EwJSMzAeFw0yNDAyMTkwMDUzNDVaFw0yNDA1MTkwMDUzNDRaMCQxIjAgBgNVBAMT GWNvdXJzZXdvcmtzMi5jb2x1bWJpYS5lZHUwggEiMA0GCSqGSIb3DQEBAQUAA4IB DwAwggEKAoIBAQDmh9WKgdyZPnOndlo9lsJOe27roLUK6hX8NDeWqXbor+Kd1jwu ANsQEaoYhwwBJb1HeoOqVRTry6Pv3OqPFYA9pla+ND1scTdqk0DySX2bhQqJraob UaIRvmFVW/shEsPIAM/HdO8/pUKbgwrHA0KXRE1EEUgKZ5wH9o1+xxmSY0iS7YPp Nldbtzgz2Ptgf0D8KWyYc46i8nkkmCkxkN9eu/j6xCCbo/d3zepNtbAx3AnT3nRJ kNhz3dv6HGq7vJoLgE4Hzp8aea6CtU5EPmh8a8xzYOUepoAz/FKJgOBUyAx3zSz4 tCpUlNx1nCIKCV4H4BKgyPPyKrciZcCNC3qNAgMBAAGjggIbMIICFzAOBgNVHQ8B Af8EBAMCBaAwHQYDVR0lBBYwFAYIKwYBBQUHAwEGCCsGAQUFBwMCMAwGA1UdEwEB /wQCMAAwHQYDVR0OBBYEFKJjPPv65QYiYx33a/ZNgP7O06SfMB8GA1UdIwQYMBaA FBQusxe3WFbLrlAJQOYfr52LFMLGMFUGCCsGAQUFBwEBBEkwRzAhBggrBgEFBQcw AYYVaHR0cDovL3IzLm8ubGVuY3Iub3JnMCIGCCsGAQUFBzAChhZodHRwOi8vcjMu aS5sZW5jci5vcmcvMCQGA1UdEQQdMBuCGWNvdXJzZXdvcmtzMi5jb2x1bWJpYS5l ZHUwEwYDVR0gBAwwCjAIBgZngQwBAgEwggEEBgorBgEEAdZ5AgQCBIH1BIHyAPAA dgBIsONr2qZHNA/lagL6nTDrHFIBy1bdLIHZu7+rOdiEcwAAAY2/EbdjAAAEAwBH MEUCIQC4NK3EVxoWe/T/UX9W+OcHdAI6qUhkvVR61M1idjaTnQIgZs7Wtm9v0u/k be5VRXanKGePzhvoXkc9DBZvtpmiym4AdgDuzdBk1dsazsVct520zROiModGfLzs 3sNRSFlGcR+1mwAAAY2/EbfUAAAEAwBHMEUCIQDx94ubbt1u25PaNGqTQrwYdt+b EIbwEu+nwV/+CeGebgIgEbwBQqhWfIqNX1rMppYpOxdtQnLe9Gkb58k+EtgfM8cw DQYJKoZIhvcNAQELBQADggEBAKTrR7gHJZhG48ss+mAMVxRkBWuC+Yjltqynf4C8 YEoy6ASTBy/lfqHIP1Z5JN0tNByuf1QwvBXCBBUCiDJanEqyNrYCGi2t1sn4gAp4 WxAF5LzudvUk+coG5VqJNZDkULgjTAjoit/C0Oc3cn630twGdFkiK9jDDVlm+GrX g1166yhjIUEHsqqJAaV3Kpf5JiizbSxlPDBiwdzGdoVS+wP80LOqzQfhQT4wuLh9 or4YV9tPkcGHyZucAN/WezqMchkf0WE1T32xJMkXyrroyjgSYrw6x1Jw9BF3tJM7 u93dOpCaWf/TUiBipieuC2b628T0PodXYKUyP7DEAlg/nsg= -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA5ofVioHcmT5zp3ZaPZbC Tntu66C1CuoV/DQ3lql26K/indY8LgDbEBGqGIcMASW9R3qDqlUU68uj79zqjxWA PaZWvjQ9bHE3apNA8kl9m4UKia2qG1GiEb5hVVv7IRLDyADPx3TvP6VCm4MKxwNC l0RNRBFICmecB/aNfscZkmNIku2D6TZXW7c4M9j7YH9A/ClsmHOOovJ5JJgpMZDf Xrv4+sQgm6P3d83qTbWwMdwJ0950SZDYc93b+hxqu7yaC4BOB86fGnmugrVORD5o fGvMc2DlHqaAM/xSiYDgVMgMd80s+LQqVJTcdZwiCgleB+ASoMjz8iq3ImXAjQt6 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 335269718787847092469068134431251654696925 . . . . . . . . [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 2024-02-19 00:53:45 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-05-19 00:53:44 +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 'courseworks2.columbia.edu' . . . . . . . . [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 29101792455411658324861351771940165875382090670079719847635229851854628875508561322339398572898514100451384393083542849584656990293358535581791970313672574430570493915317620794372589190369139681852839957184386169277455635235717352267401885691404708975157209115046252075139095644116208453143093262432767819145621295932084481346608123071082090197830465846949260985459324747881281381879211708620132274425793376638128782466662583315427642246224202938200836988442782699916005165615529949212774778435071285664823909814027984355532924834179798627990120528021945250461289609184132746518802220619692544409471352900750565669517 . . . . . . . . . . . . . . . . . . . . [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) a2633cfbfae50622631df76bf64d80feced3a49f . . . . . . . . . . . . . . . . [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 (29 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'courseworks2.columbia.edu' . . . . . . . . . . . . . . . . [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) 00f000760048b0e36bdaa647340fe56a02fa9d30eb1c5201cb56dd2c81d9bbbfab39d884730000018dbf11b7630000040300473045022100b834adc4571a167bf4ff517f56f8e70774023aa94864bd547ad4cd627636939d022066ced6b66f6fd2efe46dee554576a728678fce1be85e473d0c166fb699a2ca6e007600eecdd064d5db1acec55cb79db4cd13a23287467cbcecdec351485946711fb59b0000018dbf11b7d40000040300473045022100f1f78b9b6edd6edb93da346a9342bc1876df9b1086f012efa7c15ffe09e19e6e022011bc0142a8567c8a8d5f5acca696293b176d4272def4691be7c93e12d81f33c7 . . . . [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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