ucu.imperial.ac.uk
Issued by R3
About this certificate
This digital certificate with serial number 03:6a:e1:77:7c:f9:49:8d:28:bd:81:63:c6:83:d9:09:5f:43 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): 03:6a:e1:77:7c:f9:49:8d:28:bd:81:63:c6:83:d9:09:5f:43Serial Number (int): 297706485406047355158387452554613902368579
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: c6:7e:83:7f:00:be:ee:98:34:9a:cb:d6:3b:e4:d6:e7:c0:c0:53:ad
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6
Fingerprint (sha1): 7f:8c:e3:68:ac:d7:fb:b1:02:ee:18:7c:f8:81:b9:7f:ce:76:4d:30
Fingerprint (sha256): 70:89:25:d0:f3:ed:ea:67:da:91:5a:5e:70:d7:8f:1e:fb:68:af:08:05:b3:c6:c2:98:6c:2e:fd:fd:76:44:71
Issuing Certificate URL: http://r3.i.lencr.org/
Revocation information
OCSP Server: http://r3.o.lencr.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----- MIIFgDCCBGigAwIBAgISA2rhd3z5SY0ovYFjxoPZCV9DMA0GCSqGSIb3DQEBCwUA MDIxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MQswCQYDVQQD EwJSMzAeFw0yMzAzMTIwNDIyMzNaFw0yMzA2MTAwNDIyMzJaMB0xGzAZBgNVBAMT EnVjdS5pbXBlcmlhbC5hYy51azCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoC ggEBAMKFAAt9klebudvw88lxHsdSqn3X9YCGU4cqX35gCuwahCAUhXmRpMQUmZnr NA3CyeUJG8gjpoJwnAGg/nEA67aQS7wuoh4F2DX7ZAHQarbrC7SZ3J6SFZwyrI+r Y2TZH5tjmbulLiSRxeIn43k7qsQs1kZ5j+JWSqE6chSMhgWQfNjR4kYmK0xNUjNV MAiy62ifu6n5FR8Yl9uscUMolW+8xcsoiVy799+yasZ7d9/4nTTZ2DS+55dTDoYm n8DrNJO6cVjuZBGB5wDY7yMXhDmFgfEL+eHodumgt53+Y3yb8cPsxgJeJdjYj6/K Vy9VL8+XvFHp3kupfIJtTmI+O2MCAwEAAaOCAqMwggKfMA4GA1UdDwEB/wQEAwIF oDAdBgNVHSUEFjAUBggrBgEFBQcDAQYIKwYBBQUHAwIwDAYDVR0TAQH/BAIwADAd BgNVHQ4EFgQUxn6DfwC+7pg0msvWO+TW58DAU60wHwYDVR0jBBgwFoAUFC6zF7dY VsuuUAlA5h+vnYsUwsYwVQYIKwYBBQUHAQEESTBHMCEGCCsGAQUFBzABhhVodHRw Oi8vcjMuby5sZW5jci5vcmcwIgYIKwYBBQUHMAKGFmh0dHA6Ly9yMy5pLmxlbmNy Lm9yZy8wcQYDVR0RBGowaIISdWN1LmltcGVyaWFsLmFjLnVrghp1Y3VpbXBlcmlh bC53ZWIudWN1Lm9yZy51a4IWd3d3LnVjdS5pbXBlcmlhbC5hYy51a4Ied3d3LnVj dWltcGVyaWFsLndlYi51Y3Uub3JnLnVrMEwGA1UdIARFMEMwCAYGZ4EMAQIBMDcG CysGAQQBgt8TAQEBMCgwJgYIKwYBBQUHAgEWGmh0dHA6Ly9jcHMubGV0c2VuY3J5 cHQub3JnMIIBBgYKKwYBBAHWeQIEAgSB9wSB9ADyAHcAtz77JN+cTbp18jnFulj0 bF38Qs96nzXEnh0JgSXttJkAAAGG1EU+GgAABAMASDBGAiEApyoy/DuLGk4T+lDk WMKlwf0W4pkNy+9BrhKkSrVvFe8CIQCdGJXUmT1eMAWik00cIR0EHYnQS9FX4/Mc aHwQcUxskwB3AOg+0No+9QY1MudXKLyJa8kD08vREWvs62nhd31tBr1uAAABhtRF PhIAAAQDAEgwRgIhAOqbfuLizyREwXJkCqRJYsVSgnqH0Dau8FIa5FeEgJ9XAiEA xwyWgbm/YjO+rZx8aQB8hy9W6lQI2WNTYn474C8sepgwDQYJKoZIhvcNAQELBQAD ggEBAJUjAbq6jpYoFKRm7p10rs26jwZMnr+lVJuf6SI58+pp8TdeuOCv98GoiY4g sdjZuz2ez8vaqsR87pUpAkzIiAvyPFphsjV7+HZ8l7xONSIAxr67idgkiVc4xAO3 7Ro3Zok+cq0ZDqfusajP6J8psQlY+PGUv6Pi004m2BrPIvWbCkIG0ETTeSJj/jFA qtg04KaPidQ06AJ/3kt85saE9FJ3ns1FeLlEiu7LCasa7QJITqgPLQmPK8TLBi7S cQBpWBVSH9mUeCoKVhJHyGGB3ORJzFzY4H31nAVY0bZqy7CJmpWawbhSvy0s6N8+ ntkkQvTwh/dqM3Y7fUw/6yK8O04= -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAwoUAC32SV5u52/DzyXEe x1Kqfdf1gIZThypffmAK7BqEIBSFeZGkxBSZmes0DcLJ5QkbyCOmgnCcAaD+cQDr tpBLvC6iHgXYNftkAdBqtusLtJncnpIVnDKsj6tjZNkfm2OZu6UuJJHF4ifjeTuq xCzWRnmP4lZKoTpyFIyGBZB82NHiRiYrTE1SM1UwCLLraJ+7qfkVHxiX26xxQyiV b7zFyyiJXLv337Jqxnt33/idNNnYNL7nl1MOhiafwOs0k7pxWO5kEYHnANjvIxeE OYWB8Qv54eh26aC3nf5jfJvxw+zGAl4l2NiPr8pXL1Uvz5e8UeneS6l8gm1OYj47 YwIDAQAB -----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 297706485406047355158387452554613902368579 . . . . . . . . [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 2023-03-12 04:22:33 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2023-06-10 04:22:32 +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 24555815994251373158066706526655434013124259940636129061793075197623962270719380733704258758318264799557594848804923013298178467045524318546915330836398191834704298464694493135373507856268064350555526501010483364059843205344796775795650719344097874720492208721175874777449114889552750407342058680851624098900951481167888247927983224544196612219015928474658950745985215092856472265316714424644205840458415952480875281404772465516519844859964390638815074697672278062247771858419137574913986787249074889993267982340722356463767550950534461763572832845466533345834525908286016989958463695049540530119817985417083166276451 . . . . . . . . . . . . . . . . . . . . [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) c67e837f00beee98349acbd63be4d6e7c0c053ad . . . . . . . . . . . . . . . . [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 (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 (247 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (244 bytes) 00f2007700b73efb24df9c4dba75f239c5ba58f46c5dfc42cf7a9f35c49e1d098125edb49900000186d4453e1a0000040300483046022100a72a32fc3b8b1a4e13fa50e458c2a5c1fd16e2990dcbef41ae12a44ab56f15ef0221009d1895d4993d5e3005a2934d1c211d041d89d04bd157e3f31c687c10714c6c93007700e83ed0da3ef5063532e75728bc896bc903d3cbd1116beceb69e1777d6d06bd6e00000186d4453e120000040300483046022100ea9b7ee2e2cf2444c172640aa44962c552827a87d036aef0521ae45784809f57022100c70c9681b9bf6233bead9c7c69007c872f56ea5408d96353627e3be02f2c7a98 . . . . [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) 00952301baba8e962814a466ee9d74aecdba8f064c9ebfa5549b9fe92239f3ea69f1375eb8e0aff7c1a8898e20b1d8d9bb3d9ecfcbdaaac47cee9529024cc8880bf23c5a61b2357bf8767c97bc4e352200c6bebb89d824895738c403b7ed1a3766893e72ad190ea7eeb1a8cfe89f29b10958f8f194bfa3e2d34e26d81acf22f59b0a4206d044d3792263fe3140aad834e0a68f89d434e8027fde4b7ce6c684f452779ecd4578b9448aeecb09ab1aed02484ea80f2d098f2bc4cb062ed27100695815521fd994782a0a561247c86181dce449cc5cd8e07df59c0558d1b66acbb0899a959ac1b852bf2d2ce8df3e9ed92442f4f087f76a33763b7d4c3feb22bc3b4e