ucu.imperial.ac.uk
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:43:cc:fb:4f:97:44:78:28:bb:23:86:27:3b:52:77:c1:57 was issued on by Let's Encrypt.
With 4 subject alternative names this certificate can be used to secure multiple fqdn's. 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=ucu.imperial.ac.uk
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 03:43:cc:fb:4f:97:44:78:28:bb:23:86:27:3b:52:77:c1:57Serial Number (int): 284408243770930233543973778922177960591703
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: 62:8b:1e:9e:80:d3:8b:5b:f4:48:67:7c:4d:55:00:bf:b0:bc:0a:96
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): 84:d6:48:ec:29:a7:54:bf:f3:25:90:06:3e:06:25:c6:52:8e:a0:db
Fingerprint (sha256): 16:45:de:4c:07:1d:6a:5d:eb:e0:f5:47:ce:56:eb:33:8a:76:02:4e:9a:3b:b2:87:3c:c5:54:3c:32:a8:52:c8
Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/
Revocation information
OCSP Server: http://ocsp.int-x3.letsencrypt.orgCheck the revocation status for certificate ucu.imperial.ac.uk
4
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for ucu.imperial.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
ucu.imperial.ac.uk
ucuimperial.web.ucu.org.uk
www.ucu.imperial.ac.uk
www.ucuimperial.web.ucu.org.uk
ucuimperial.web.ucu.org.uk
www.ucu.imperial.ac.uk
www.ucuimperial.web.ucu.org.uk
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Certificate
The complete raw certificate details for ucu.imperial.ac.uk in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIFsDCCBJigAwIBAgISA0PM+0+XRHgouyOGJztSd8FXMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xOTEwMTgxMzI5MjNaFw0y MDAxMTYxMzI5MjNaMB0xGzAZBgNVBAMTEnVjdS5pbXBlcmlhbC5hYy51azCCASIw DQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBAKW4txKkBrn6hfJYQCDuyofc9W88 x1Q2Lhb2XwTSipb/06yvTIDzLaXBu28Ns3C062o0s2tAkIy3UmTgsJHhABSTNOrw zCyoS6AgUmtevrTaYl5cXeAyQz6GxuR+MtXkzoSYtYZ3HtLFHK5QPHicYVpOVvvk IQi6ONE0DjrFN3bSsGTW1d8SkFFP/GQ3HLM8Pb2gXLqAp81fvMDIQ3K+Cj+tSfUi qd7uzTZqVf4tD66ZI2g+prgFP+wCw0fC1LBTRclPb2NQGVAL6KLqWLjjUBRmRBW9 f0id5DgLpsgWYw2jjcCCYR6IW7UHqNVEC5svaxQscrNjzSFE5ODn+A1MFJ8CAwEA AaOCArswggK3MA4GA1UdDwEB/wQEAwIFoDAdBgNVHSUEFjAUBggrBgEFBQcDAQYI KwYBBQUHAwIwDAYDVR0TAQH/BAIwADAdBgNVHQ4EFgQUYosenoDTi1v0SGd8TVUA v7C8CpYwHwYDVR0jBBgwFoAUqEpqYwR93brm0Tm3pkVl7/Oo7KEwbwYIKwYBBQUH AQEEYzBhMC4GCCsGAQUFBzABhiJodHRwOi8vb2NzcC5pbnQteDMubGV0c2VuY3J5 cHQub3JnMC8GCCsGAQUFBzAChiNodHRwOi8vY2VydC5pbnQteDMubGV0c2VuY3J5 cHQub3JnLzBxBgNVHREEajBoghJ1Y3UuaW1wZXJpYWwuYWMudWuCGnVjdWltcGVy aWFsLndlYi51Y3Uub3JnLnVrghZ3d3cudWN1LmltcGVyaWFsLmFjLnVrgh53d3cu dWN1aW1wZXJpYWwud2ViLnVjdS5vcmcudWswTAYDVR0gBEUwQzAIBgZngQwBAgEw NwYLKwYBBAGC3xMBAQEwKDAmBggrBgEFBQcCARYaaHR0cDovL2Nwcy5sZXRzZW5j cnlwdC5vcmcwggEEBgorBgEEAdZ5AgQCBIH1BIHyAPAAdQBep3P531bA57U2SH3Q SeAyepGaDIShEhKEGHWWgXFFWAAAAW3fRea/AAAEAwBGMEQCIGlO47xZ+Xw4THZi Iy7NIiXBOejaEuN7/ydWLIr9XxwlAiBKLoyBDaFeAt93mr6kvQ+VRtY2dcfvu2jc VWs07XajjAB3ALIeBcyLos2KIE6HZvkruYolIGdr2vpw57JJUy3vi5BeAAABbd9F 5r0AAAQDAEgwRgIhALDtC6y+IRRlUcZNMVUP+5roDEzKgVPJiUGAd8qIMHqVAiEA 2Ot/I0qIIO+33WoXvsGAnjvs3tFawF3XzI9EfXh376EwDQYJKoZIhvcNAQELBQAD ggEBAEdLx3kW1u1uOb+iQzcWVEJ+eIEMP9OxEbVCr3J5RbTU21E2NrH2cMdCeXa9 6ZWPwR2LwvMCuCFlp0yBaKOdJkM17DS3sjwk6ieFLa9dwKnrZFQ7Cf+vMTKgz3Ww wG3Y9MwzyrPU9QxOhzhIuqz53wVZYE0QUXac8eLfdBh8TLlC1nwqJZDHtvu3qlys G3oOiAvdNHJmJTMFphf1MxBg4JJ/X76zGDzVTa3rtLYEcQDiGi/wz9YC3x2qJXDc S4ca7zC2nAC2rkNjmBNJCuQaLGW4qmj6W0p+8XUOp2mBMYO5d7qJwyyrVFyYAD6p HVeD74/xvGzQfvTXlWDjrZo8r7I= -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEApbi3EqQGufqF8lhAIO7K h9z1bzzHVDYuFvZfBNKKlv/TrK9MgPMtpcG7bw2zcLTrajSza0CQjLdSZOCwkeEA FJM06vDMLKhLoCBSa16+tNpiXlxd4DJDPobG5H4y1eTOhJi1hnce0sUcrlA8eJxh Wk5W++QhCLo40TQOOsU3dtKwZNbV3xKQUU/8ZDccszw9vaBcuoCnzV+8wMhDcr4K P61J9SKp3u7NNmpV/i0PrpkjaD6muAU/7ALDR8LUsFNFyU9vY1AZUAvooupYuONQ FGZEFb1/SJ3kOAumyBZjDaONwIJhHohbtQeo1UQLmy9rFCxys2PNIUTk4Of4DUwU nwIDAQAB -----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 284408243770930233543973778922177960591703 . . . . . . . . [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 2019-10-18 13:29:23 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-01-16 13:29:23 +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 'ucu.imperial.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 20920406743945195837822587046295298198690769997936272214134979185635995275979219799419495239354643540789562504178006235387300117556162854063987458519383798801783332904863869193483890960172394696678535211677969273315997949500167355229155447796963042697004183751216156796558688057783364451790005986614146294199003323916479227227077133639130400292470809926654446485997260880307262411364848200553583673382895078022998331745075552678625944180955016755828060000402300624551088819844226732573706002482886836218445569852419321684083129368765395309314968907691711526487836791932261085872860526298667368562794713041114934023327 . . . . . . . . . . . . . . . . . . . . [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) 628b1e9e80d38b5bf448677c4d5500bfb0bc0a96 . . . . . . . . . . . . . . . . [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 (106 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'ucu.imperial.ac.uk' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'ucuimperial.web.ucu.org.uk' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.ucu.imperial.ac.uk' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.ucuimperial.web.ucu.org.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 (245 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (242 bytes) 00f00075005ea773f9df56c0e7b536487dd049e0327a919a0c84a1121284187596817145580000016ddf45e6bf00000403004630440220694ee3bc59f97c384c7662232ecd2225c139e8da12e37bff27562c8afd5f1c2502204a2e8c810da15e02df779abea4bd0f9546d63675c7efbb68dc556b34ed76a38c007700b21e05cc8ba2cd8a204e8766f92bb98a2520676bdafa70e7b249532def8b905e0000016ddf45e6bd0000040300483046022100b0ed0bacbe21146551c64d31550ffb9ae80c4cca8153c989418077ca88307a95022100d8eb7f234a8820efb7dd6a17bec1809e3becded15ac05dd7cc8f447d7877efa1 . . . . [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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