possibilities.ntu.ac.uk
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:9b:20:c2:32:99:ed:b4:7e:da:22:5e:d2:5e:71:b0:91:b3 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=possibilities.ntu.ac.uk
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 03:9b:20:c2:32:99:ed:b4:7e:da:22:5e:d2:5e:71:b0:91:b3Serial Number (int): 314124168295797830041470817363245063508403
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: 65:08:20:f5:1f:6e:f4:04:c0:3a:d4:c9:9d:b6:74:8a:56:d4:87:4e
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): 21:6f:02:8d:15:23:08:72:fd:a8:ef:9d:7b:46:17:5c:c5:3d:ee:b6
Fingerprint (sha256): 20:c7:6a:1c:03:5f:31:2c:cf:7f:7a:6c:da:dc:a6:f5:a7:83:d1:49:78:61:a6:e5:6f:55:22:1b:bc:f2:f4:c4
Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/
Revocation information
OCSP Server: http://ocsp.int-x3.letsencrypt.orgCheck the revocation status for certificate possibilities.ntu.ac.uk
1
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for possibilities.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
possibilities.ntu.ac.uk
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landing.online.ntu.ac.uk
staffpass.ntu.ac.uk
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wireless.ntu.ac.uk
elearn.ntu.ac.uk
outlook.su.ntu.ac.uk
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mimas.ntu.ac.uk
thomasmore.ads.ntu.ac.uk
shib2idp.ntu.ac.uk
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estates.ntu.ac.uk
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office365.ntu.ac.uk
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Certificate
The complete raw certificate details for possibilities.ntu.ac.uk in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIFZTCCBE2gAwIBAgISA5sgwjKZ7bR+2iJe0l5xsJGzMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xODExMTMwMzAwMDlaFw0x OTAyMTEwMzAwMDlaMCIxIDAeBgNVBAMTF3Bvc3NpYmlsaXRpZXMubnR1LmFjLnVr MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAn2iSEXctJaOOABk/QWhz GaarIXZDfARuYrhvuSS1YgJ+JsnmXVVxP2ImpN1I0oG4TTZryGb9xy2q6tSqFHDF FlPgnHvwfVXOu4Rmbky4F+5PnC6FOOpDYTWaEIO5XAQnnmZOXxyetM0AP6teYQaL XkdtX+Bm2eCTHsjqRWw/1V7qy3FYDefFhL9Ms50Cz/saNAJIJBscCkTmt/nPT+ev HWY89cbUCg/LtK7VuXThDgcaR7D05qtPCVGqKx+v7+S4aH95z8CxpiOlZ7PlfOhB 8qNN8jSmW2r2OCK+TL8XfuW9BTRGflSNhBOM/SOyuHcoMga7HgFKafOzfhq/aAch 2QIDAQABo4ICazCCAmcwDgYDVR0PAQH/BAQDAgWgMB0GA1UdJQQWMBQGCCsGAQUF BwMBBggrBgEFBQcDAjAMBgNVHRMBAf8EAjAAMB0GA1UdDgQWBBRlCCD1H270BMA6 1MmdtnSKVtSHTjAfBgNVHSMEGDAWgBSoSmpjBH3duubRObemRWXv86jsoTBvBggr BgEFBQcBAQRjMGEwLgYIKwYBBQUHMAGGImh0dHA6Ly9vY3NwLmludC14My5sZXRz ZW5jcnlwdC5vcmcwLwYIKwYBBQUHMAKGI2h0dHA6Ly9jZXJ0LmludC14My5sZXRz ZW5jcnlwdC5vcmcvMCIGA1UdEQQbMBmCF3Bvc3NpYmlsaXRpZXMubnR1LmFjLnVr MEwGA1UdIARFMEMwCAYGZ4EMAQIBMDcGCysGAQQBgt8TAQEBMCgwJgYIKwYBBQUH AgEWGmh0dHA6Ly9jcHMubGV0c2VuY3J5cHQub3JnMIIBAwYKKwYBBAHWeQIEAgSB 9ASB8QDvAHYAKTxRllTIOWW6qlD8WAfUt2+/WHopctykwwz05UVH9HgAAAFnCzn/ 4AAABAMARzBFAiBUJLHVDli6GtnOGGWJpvyrswGtJk0Xt4sO+mS4JITTLAIhAOOb UMG37ZC0OG85QwlAk/VU5b4AVIJGp+n1nKnpRxqmAHUAVYHUwhaQNgFK6gubVzxT 8MDkOHhwJQgXL6OqHQcT0wwAAAFnCzoBeQAABAMARjBEAiAytQDazmHh8NOV/yiv 4azwubbuVMDGbxIqogLvgtIxcQIgJe36sZGmmJipThp6ol+s2ujK/i5PssKL0h2x JSR6N6EwDQYJKoZIhvcNAQELBQADggEBAJQvL1qkzt/WhPTyRbh7WH/bZOnJudiV zrQu6n9rLK590/v17qZBHyTC+yex8+7sCWdKvzFUzQ/XTDV2saHEyO6/ds099aRv NcYaLU5YP0Loej2NlYjqirEgwd6k8+HPv/1DmLolNs5z1y0eHFW3nMJLSQToTNx8 dgoy2qNV5oM7vCktLfEScde/WajMiM9DWJnrtG8lTk6qfpmFeZsMWhTUay9qjXOd cT/n9zArtw6S11SWUMSghBoxFIwtkOV+7PNYNF9f25PDY6eu5rN5Dd4SWUPSg6Ph Au4OTHy+YRXgD1+PeIwbwcXFOezotFKxs6YspFKGKy3qH7v6s59kPzU= -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAn2iSEXctJaOOABk/QWhz GaarIXZDfARuYrhvuSS1YgJ+JsnmXVVxP2ImpN1I0oG4TTZryGb9xy2q6tSqFHDF FlPgnHvwfVXOu4Rmbky4F+5PnC6FOOpDYTWaEIO5XAQnnmZOXxyetM0AP6teYQaL XkdtX+Bm2eCTHsjqRWw/1V7qy3FYDefFhL9Ms50Cz/saNAJIJBscCkTmt/nPT+ev HWY89cbUCg/LtK7VuXThDgcaR7D05qtPCVGqKx+v7+S4aH95z8CxpiOlZ7PlfOhB 8qNN8jSmW2r2OCK+TL8XfuW9BTRGflSNhBOM/SOyuHcoMga7HgFKafOzfhq/aAch 2QIDAQAB -----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 314124168295797830041470817363245063508403 . . . . . . . . [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 2018-11-13 03:00:09 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-02-11 03:00:09 +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 'possibilities.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 20123456163988643948807387707753881693138962240038635375814746144101006047816607643618915188536070325722855004959739151188339366172810337685333797535133843154700129544303080170714032797576006789171518900085471333831361449050496327643074627189794116366349399971802976686268683477208103618466641460607707792262479953345892053751281594826769930725643005622167961246072136687551606130472003909504989908240276190562771940756579572611227992145301081578877505596925651838335361135093572795849264302323557189006242944114058601358978122711584439566081743920596346401586254064808840606421701415251672477216608296315382686753241 . . . . . . . . . . . . . . . . . . . . [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) 650820f51f6ef404c03ad4c99db6748a56d4874e . . . . . . . . . . . . . . . . [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 (27 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'possibilities.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 (244 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (241 bytes) 00ef007600293c519654c83965baaa50fc5807d4b76fbf587a2972dca4c30cf4e54547f478000001670b39ffe0000004030047304502205424b1d50e58ba1ad9ce186589a6fcabb301ad264d17b78b0efa64b82484d32c022100e39b50c1b7ed90b4386f3943094093f554e5be00548246a7e9f59ca9e9471aa60075005581d4c2169036014aea0b9b573c53f0c0e43878702508172fa3aa1d0713d30c000001670b3a01790000040300463044022032b500dace61e1f0d395ff28afe1acf0b9b6ee54c0c66f122aa202ef82d23171022025edfab191a69898a94e1a7aa25facdae8cafe2e4fb2c28bd21db125247a37a1 . . . . [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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