email.essex.ac.uk

Issued by R3

About this certificate

This digital certificate with serial number 04:95:ab:42:d8:a5:4c:b0:a1:e6:af:48:ce:c1:1a:20:70:d3 was issued on by Let's Encrypt.

With 5 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:
  • DV certificate contains a subject common name, this is not recommended. If certificate policy 2.23.140.1.2.1 (CA/B BR domain validated) is included, only country and/or common name is allowed in SubjectDN. (BRs: 7.1.2.7.2)
  • Subscriber certificates use of Subject Key Identifier is NOT RECOMMENDED (BRs v2: 7.1.2.7.6)
  • Subscriber Certificate: commonName is NOT RECOMMENDED. (BRs: 7.1.2.7.1)

Certificate Subject

CN=email.essex.ac.uk

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 04:95:ab:42:d8:a5:4c:b0:a1:e6:af:48:ce:c1:1a:20:70:d3
Serial Number (int): 399378861471229557155289935664478439895251
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: d3:6e:52:a6:82:bc:ea:85:56:ea:a6:c9:38:e3:57:2c:d9:40:80:c3
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 32:01:86:76:e4:4d:2c:ca:15:a8:ad:db:4c:04:32:5d:1f:08:b3:39
Fingerprint (sha256): 06:53:41:44:af:9a:8a:a9:48:df:a5:59:24:b6:a9:45:2b:41:bf:9f:9c:25:76:a0:a1:47:ba:97:d8:e3:43:75

Issuing Certificate URL: http://r3.i.lencr.org/

Revocation information

OCSP Server: http://r3.o.lencr.org

Check the revocation status for certificate email.essex.ac.uk

5

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for email.essex.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

autodiscover.essex.ac.uk
autodiscover.ukdataservice.ac.uk
email.essex.ac.uk
isswin307.essex.ac.uk
isswin308.essex.ac.uk

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Certificate

The complete raw certificate details for email.essex.ac.uk in PEM and ASN.1 format.

Certificate (PEM)

-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAlJV3ipEtRWNniSizA9LI
RLuDCH5DLoHUUZophkbQCqkBJH8ZdCxweDimc88rGXQr9Xgh05J9WzLPgfR6qjb7
rsIiaugYOSXdmegpcG/uttYYJUKm+3j9segICVxBK15wvZgbJnl4ii6b/2p8ouPB
kI8cAFNHeD8JZ916kXVtp78ejtNIWmsHrCTjNI0fJuq7414rrgruFIE43O4F8jLD
FnmxOHhvKUS0GS00Cw1qLVpbR6IkoiRCppGe8BbD8bSmofHI2aMRB725Tah3La61
ZVIpwCM7FI6GqPV3UvFFMwUXEAU4L8SCWSSaHeVVEoAS3ioz9EPQskNGrnw0RAvc
PwIDAQAB
-----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 399378861471229557155289935664478439895251
 . . . . . . . . [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 2024-01-02 07:13:50 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-04-01 07:13:49 +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 'email.essex.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 18756974039043121111407213707971462371298142208408674358506079986558972252072047309890836250571098350677942321544141864464465344550639047808193927531772792975064690961953660398830018413709304932275460567353963750483274444088100938082213722413671878975698556431521111500606153850369467397063370680518679133060589642223952686203474836565321835560549701488975129854715367345984846061015757901067391302621319270441880156558085946570842524041023961718751424865904864497053576258701573860589326954107392104285199238643844181145808044137316376350411125832897530073798708422678995690208537940385924787999744146958527092218943
 . . . . . . . . . . . . . . . . . . . . [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)
							d36e52a682bcea8556eaa6c938e3572cd94080c3
 . . . . . . . . . . . . . . . . [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 (127 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'autodiscover.essex.ac.uk'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'autodiscover.ukdataservice.ac.uk'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'email.essex.ac.uk'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'isswin307.essex.ac.uk'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'isswin308.essex.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 (12 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 1.3.6.1.4.1.11129.2.4.2
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (246 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (243 bytes)
							00f100760048b0e36bdaa647340fe56a02fa9d30eb1c5201cb56dd2c81d9bbbfab39d884730000018cc93c6ff20000040300473045022100f159be57bc42594266e2c8e567c009beabe84d9646646191ce701240d3e8453b0220429baa2069eb5b90a56434d849d639f48fe87c588fabcab586153922d194b7070077003b5377753e2db9804e8b305b06fe403b67d84fc3f4c7bd000d2d726fe1fad4170000018cc93c6ff300000403004830460221008e4a6c36da43146f6752cb5819c60833723f5a224f7cc0867703b62bec260660022100b1046ca0fe5e32edf49d59116af9af6a9d50eabc7c462550a1ad121b93ed6f64
 . . . . [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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