lawquiz.ntu.ac.uk
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:87:4a:d6:7c:ff:1b:7e:71:d5:cb:57:02:30:23:60:28:d7 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=lawquiz.ntu.ac.uk
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 03:87:4a:d6:7c:ff:1b:7e:71:d5:cb:57:02:30:23:60:28:d7Serial Number (int): 307374453888053723986568865409794834442455
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: e8:c6:79:04:7f:ba:26:02:da:53:03:6a:b6:ac:4a:d4:b6:06:0b:9a
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): 11:87:f4:91:95:21:0e:76:87:cd:87:e9:23:ba:33:2d:78:ec:26:9b
Fingerprint (sha256): 15:b7:0d:6f:11:50:de:d0:28:b7:8c:ab:c7:76:33:e8:99:f1:32:7c:41:03:2c:cc:be:5c:8c:15:a5:45:d0:f1
Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/
Revocation information
OCSP Server: http://ocsp.int-x3.letsencrypt.orgCheck the revocation status for certificate lawquiz.ntu.ac.uk
1
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for lawquiz.ntu.ac.uk
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
lawquiz.ntu.ac.uk
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staffpass.ntu.ac.uk
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Certificate
The complete raw certificate details for lawquiz.ntu.ac.uk in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIFWDCCBECgAwIBAgISA4dK1nz/G35x1ctXAjAjYCjXMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xOTEwMjUwMjAwMjBaFw0y MDAxMjMwMjAwMjBaMBwxGjAYBgNVBAMTEWxhd3F1aXoubnR1LmFjLnVrMIIBIjAN BgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAhBC0jr7aeCAStFXHburX0fZ0RK1z fPUq8FOjv3nASa5a6VN2w44Wz/JaisD3A6cOqCzaJy1iRAoDiNKctN287T7Gb9R6 e+4vHQ6qWyINgXj8JWGz3hPZNVDsBAMijm6sAt0+k9nviY5N89Pn96pOFmXNU53z kqijhSIa6nLGbQyTni8gmaeF7/Urjp+A7PU4qZdA2F0+XNlxRCKlkWPCeOX3d0ny ThkJbdya3b9CA2H+I4nmQCx+awXkmvYJtgvrb+ilNrh914QyQyC3p4RNTyvv3YaQ m2H72B83CjCKQxBvRmxhgzChppj9MKsy6OMyQiEavrehYcFLuMKHdohb/wIDAQAB o4ICZDCCAmAwDgYDVR0PAQH/BAQDAgWgMB0GA1UdJQQWMBQGCCsGAQUFBwMBBggr BgEFBQcDAjAMBgNVHRMBAf8EAjAAMB0GA1UdDgQWBBToxnkEf7omAtpTA2q2rErU tgYLmjAfBgNVHSMEGDAWgBSoSmpjBH3duubRObemRWXv86jsoTBvBggrBgEFBQcB AQRjMGEwLgYIKwYBBQUHMAGGImh0dHA6Ly9vY3NwLmludC14My5sZXRzZW5jcnlw dC5vcmcwLwYIKwYBBQUHMAKGI2h0dHA6Ly9jZXJ0LmludC14My5sZXRzZW5jcnlw dC5vcmcvMBwGA1UdEQQVMBOCEWxhd3F1aXoubnR1LmFjLnVrMEwGA1UdIARFMEMw CAYGZ4EMAQIBMDcGCysGAQQBgt8TAQEBMCgwJgYIKwYBBQUHAgEWGmh0dHA6Ly9j cHMubGV0c2VuY3J5cHQub3JnMIIBAgYKKwYBBAHWeQIEAgSB8wSB8ADuAHUA8JWk WfIA0YJAEC0vk4iOrUv+HUfjmeHQNKawqKqOsnMAAAFuANuTjwAABAMARjBEAiBi icCnvG+YzfcIhNFPPVMVnwftLsfUAZ73IscAYjGOAAIgFPgxDjgRaGJv70Zhm3CI D2eXrMe1W2wvdCKqFu1YbYQAdQAHt1wb5X1o//Gwxh0jFce65ld8V5S3au68YToa adOiHAAAAW4A25O4AAAEAwBGMEQCIGdPdRV+E7qXJvQgQIwZoSRrukEMl0hib6qZ vs6m1fqBAiAyZPUvPGJNCvE0k0ivkJDJ8gpxxL0sBUXflEdjiyTiWzANBgkqhkiG 9w0BAQsFAAOCAQEAOrFG6vDeOQSQfRjWuC6XQnkH5qBrR88N7OJLKIFgJNupWStV 06MNDHnwh+XRv5SMS5XMxidGkEjh0bUWi2Q5pn8LH2N8+uwkktSpMqkFZIfc5Z31 cn4g5FU221BIEkv28Z8A0qLNeFdpchDdQu2sA6teFXR+XWWlyhh/5bvl/x7ieEMa cHMVnj/9sULtMsm4+JcWk49J5rIrIhYsJ2U3FGCQtWtxcDtDnRdIPpvFtTbLttkG bqJMTTUopI2+TVBcBZT6qO+ReO/oHHhSGBPS+f5z4C6iccPUClaCBmx1bh35GO2Q b0IR4ePifIb1TwfWACCMR6Ecfzg6zY34x1GOqQ== -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAhBC0jr7aeCAStFXHburX 0fZ0RK1zfPUq8FOjv3nASa5a6VN2w44Wz/JaisD3A6cOqCzaJy1iRAoDiNKctN28 7T7Gb9R6e+4vHQ6qWyINgXj8JWGz3hPZNVDsBAMijm6sAt0+k9nviY5N89Pn96pO FmXNU53zkqijhSIa6nLGbQyTni8gmaeF7/Urjp+A7PU4qZdA2F0+XNlxRCKlkWPC eOX3d0nyThkJbdya3b9CA2H+I4nmQCx+awXkmvYJtgvrb+ilNrh914QyQyC3p4RN Tyvv3YaQm2H72B83CjCKQxBvRmxhgzChppj9MKsy6OMyQiEavrehYcFLuMKHdohb /wIDAQAB -----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 307374453888053723986568865409794834442455 . . . . . . . . [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 2019-10-25 02:00:20 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-01-23 02:00:20 +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 'lawquiz.ntu.ac.uk' . . . . . . . . [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 16671693947513066949370637471644855333779206175106897649311605667493101668755074470073188398128241024105519974191608402904404026726076709542662031193853613607250696663629605666515807888711946591739368188547352565527934925725586019689674257327112526928595198964691455095045324003072182374184005768830349382547536653285713780553000741900653826861389389439980016535112685714666949661824034261537950438778738907279449351481192603220133821631357256643328184659322338329266688317073280602331320015763572873165136568736410211207469290683920904220652111592950737452808590013510188037512158266478316317230635101315645710031871 . . . . . . . . . . . . . . . . . . . . [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) e8c679047fba2602da53036ab6ac4ad4b6060b9a . . . . . . . . . . . . . . . . [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 (21 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'lawquiz.ntu.ac.uk' . . . . . . . . . . . . . . . . [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 (243 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (240 bytes) 00ee007500f095a459f200d18240102d2f93888ead4bfe1d47e399e1d034a6b0a8aa8eb2730000016e00db938f000004030046304402206289c0a7bc6f98cdf70884d14f3d53159f07ed2ec7d4019ef722c70062318e00022014f8310e381168626fef46619b70880f6797acc7b55b6c2f7422aa16ed586d8400750007b75c1be57d68fff1b0c61d2315c7bae6577c5794b76aeebc613a1a69d3a21c0000016e00db93b800000403004630440220674f75157e13ba9726f420408c19a1246bba410c9748626faa99becea6d5fa8102203264f52f3c624d0af1349348af9090c9f20a71c4bd2c0545df9447638b24e25b . . . . [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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