ucu.imperial.ac.uk
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:e0:8d:3a:32:68:ee:f9:84:a0:20:c0:42:af:74:47:95:69 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:e0:8d:3a:32:68:ee:f9:84:a0:20:c0:42:af:74:47:95:69Serial Number (int): 337747831308628592078989293362825600144745
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: 59:d4:cd:41:80:19:e4:18:d1:6c:f1:ea:49:20:43:ca:80:48:1d:fc
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): 3e:37:71:16:1e:f6:03:ea:0e:11:cb:19:83:b4:91:88:ab:73:8a:7d
Fingerprint (sha256): 5c:45:34:47:bb:c5:2a:ba:71:b8:f7:f4:e5:c3:52:f6:7c:52:64:e0:39:3d:f5:31:41:80:1d:3d:39:09:73:d3
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----- MIIFsDCCBJigAwIBAgISA+CNOjJo7vmEoCDAQq90R5VpMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xOTEyMTYxMDIxNTZaFw0y MDAzMTUxMDIxNTZaMB0xGzAZBgNVBAMTEnVjdS5pbXBlcmlhbC5hYy51azCCASIw DQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBAJ4enXgyXUQVjz+CaAUUFJVaCW7n gJyF5JKHg6DXrrRf5DfwArHt7KPJSOx1Hlygc+B9/TS+Aq8AAfEGm/hHJ/wrUQ2W NTL6hID9DadsouE82w3xv9AIR5Deowdf7gzcHQREHKHMYJIne9fQPXjq83zawADV P4gjKqDgGXmpx2lVTwA6sHEmOZtjGAttNqYKNjzSO0ZoFjmLkJdycPxgLTDB9mkZ c0h3hQg2k2Z/iWLjeXpo96CHuBYJ57vPUgr/Nn21fz9pr23X0H2Aetul6aWRgiA5 BSL1jXn+U8PvhBoCXdNWWaf1wcJHlZ9O9oBqHeVbby3TVI8BM5nbsDtoTQ0CAwEA AaOCArswggK3MA4GA1UdDwEB/wQEAwIFoDAdBgNVHSUEFjAUBggrBgEFBQcDAQYI KwYBBQUHAwIwDAYDVR0TAQH/BAIwADAdBgNVHQ4EFgQUWdTNQYAZ5BjRbPHqSSBD yoBIHfwwHwYDVR0jBBgwFoAUqEpqYwR93brm0Tm3pkVl7/Oo7KEwbwYIKwYBBQUH AQEEYzBhMC4GCCsGAQUFBzABhiJodHRwOi8vb2NzcC5pbnQteDMubGV0c2VuY3J5 cHQub3JnMC8GCCsGAQUFBzAChiNodHRwOi8vY2VydC5pbnQteDMubGV0c2VuY3J5 cHQub3JnLzBxBgNVHREEajBoghJ1Y3UuaW1wZXJpYWwuYWMudWuCGnVjdWltcGVy aWFsLndlYi51Y3Uub3JnLnVrghZ3d3cudWN1LmltcGVyaWFsLmFjLnVrgh53d3cu dWN1aW1wZXJpYWwud2ViLnVjdS5vcmcudWswTAYDVR0gBEUwQzAIBgZngQwBAgEw NwYLKwYBBAGC3xMBAQEwKDAmBggrBgEFBQcCARYaaHR0cDovL2Nwcy5sZXRzZW5j cnlwdC5vcmcwggEEBgorBgEEAdZ5AgQCBIH1BIHyAPAAdgBvU3asMfAxGdiZAKRR Ff93FRwR2QLBACkGjbIImjfZEwAAAW8OcX+cAAAEAwBHMEUCIQDE2d4+8iNXSepS idwqN184ASxR0BmQ9fgHJY1WG/4QLwIgauGvErD+ByUUxY3duEK4vJTytxZEGI5e D2O/JmEuOEAAdgAHt1wb5X1o//Gwxh0jFce65ld8V5S3au68YToaadOiHAAAAW8O cX/NAAAEAwBHMEUCIBF7oTjinQ3JjMo8KYrWS8szx4kfKXFeFgVqSw64rRTiAiEA ia8LR/cBjVMzG6n3ps1XEDDtosRfm9tZEMd8BH3U9E4wDQYJKoZIhvcNAQELBQAD ggEBAFwfSBlhEh93N7jkluxMFZwWJcvULVoFTl+9+69dsAnfJocLMOZ0E/JMCs6u 7F61kcL+xKd/h3IInxH42VWIryeCDs2KchDU5wT5P3gp7w7j5CPkZOQh7h6aj5AZ h+09Rj/PqZBAo9nyBNxMUc/BaHmmorzGG/CHualqrv4ds8JREPOqptbpvQQj+Nbg Q3jqziYW6XVdBgEi20/1nrqr5RtjgRgyNI2LJc3SvCSvP9fWz+jsUnR9+gc38lzn ujhldli//QnXjM5Df5qjkmIotA97UuKe9IIfTUuB680SBAvkFTAnOjtNOQUz3/Mp onhLcKzAni1TeSqoQ1Dbyi0C+VI= -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAnh6deDJdRBWPP4JoBRQU lVoJbueAnIXkkoeDoNeutF/kN/ACse3so8lI7HUeXKBz4H39NL4CrwAB8Qab+Ecn /CtRDZY1MvqEgP0Np2yi4TzbDfG/0AhHkN6jB1/uDNwdBEQcocxgkid719A9eOrz fNrAANU/iCMqoOAZeanHaVVPADqwcSY5m2MYC202pgo2PNI7RmgWOYuQl3Jw/GAt MMH2aRlzSHeFCDaTZn+JYuN5emj3oIe4Fgnnu89SCv82fbV/P2mvbdfQfYB626Xp pZGCIDkFIvWNef5Tw++EGgJd01ZZp/XBwkeVn072gGod5VtvLdNUjwEzmduwO2hN DQIDAQAB -----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 337747831308628592078989293362825600144745 . . . . . . . . [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 2019-12-16 10:21:56 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-03-15 10:21:56 +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 19960749060663238987192701028444689547281112539943176037419604842031125608483500090191298976044906044058116701484131612953513919517158230943538982211657210527948699892987582014838933929683731940432022240723348479687032167712780908533354362956292403589845314324312167924058191256744252002505317496955925319414576389382362975102382385852879148073619274927495770548190770717937681839149129783266697240682342075057313996486553050228609124899882890999801170355492900849822650544700511712479801450820761973730839154574187415114553183234723188053579884875205693052956621115920906221818919308849124548376608260895281995336973 . . . . . . . . . . . . . . . . . . . . [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) 59d4cd418019e418d16cf1ea492043ca80481dfc . . . . . . . . . . . . . . . . [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) 00f00076006f5376ac31f03119d89900a45115ff77151c11d902c10029068db2089a37d9130000016f0e717f9c0000040300473045022100c4d9de3ef2235749ea5289dc2a375f38012c51d01990f5f807258d561bfe102f02206ae1af12b0fe072514c58dddb842b8bc94f2b71644188e5e0f63bf26612e384000760007b75c1be57d68fff1b0c61d2315c7bae6577c5794b76aeebc613a1a69d3a21c0000016f0e717fcd00000403004730450220117ba138e29d0dc98cca3c298ad64bcb33c7891f29715e16056a4b0eb8ad14e202210089af0b47f7018d53331ba9f7a6cd571030eda2c45f9bdb5910c77c047dd4f44e . . . . [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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