www2022.essex.ac.uk

Issued by R3

About this certificate

This digital certificate with serial number 04:55:06:22:f5:93:42:de:4a:7e:af:4e:ae:28:4f:72:08:d6 was issued on by Let's Encrypt.

With 2 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=www2022.essex.ac.uk

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 04:55:06:22:f5:93:42:de:4a:7e:af:4e:ae:28:4f:72:08:d6
Serial Number (int): 377381301802246243188487548947742093084886
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: 8b:08:6b:01:0c:e4:45:4f:89:da:16:06:5a:f4:5b:1e:fc:82:aa:98
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 98:06:dd:7a:21:28:2a:58:f2:64:61:04:16:fd:c5:9d:1b:b9:68:68
Fingerprint (sha256): 14:62:71:d9:47:27:cf:56:8c:0a:c0:c4:28:8b:85:f6:6f:8b:cd:54:09:19:be:1a:13:1f:e2:70:4e:b8:42:52

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

Revocation information

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

Check the revocation status for certificate www2022.essex.ac.uk

2

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for www2022.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

www1.essex.ac.uk
www2022.essex.ac.uk

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Certificate

The complete raw certificate details for www2022.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-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAgu1DBlvu81EcIMnF35a6
wXs7hXUrAt6oLv8IYbAomB3JJnl6pq8x/yDMcnGlZNP0EpYdHVNrScsqfd4KyuUq
jBo1YhM9MhXqXqlbLx7IkOKNQFsGr743wREudfp1htbgqt4furuVwurdsxPgjwZ/
aBWa/Vu6OV+sxbZIJpm6wxFACE0sYs+53BO1cV0565oJjM0CNpRa/jW6OcOp1ecn
aagf9jB1GuTZEo8qFjD6QK+wv0QptDfgpuzZ3fojFHWFO7JsMyiNy9hvwtIXxGLc
CD+Q5plxfqfe1Q0t5XQt2HNj30DogByshdPDH1uzXNpA8FXKflA74WNcXDP/Ue5p
ZwIDAQAB
-----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 377381301802246243188487548947742093084886
 . . . . . . . . [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 2023-11-28 07:14:31 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-02-26 07:14:30 +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 'www2022.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 16527977807531130374688703737678079417833192515525393569114809872212627593011706691521590736848306849226637126473159594314509647534482211732802235472902203590139131960792908342380559207353824731948591116128780102792910169157594199453619926469442504431363237899972408936636526649629314565726810345463517107708658863336683458487404121726430991516529134713455508399460093936257464037193920454043936361139039930954993631519696562134251669687750640182860134661661176543857178526591398476737480225461889911465076904705714939966826824143318551838138811545544549433349037337925480661345653996966599076529502915354012507072871
 . . . . . . . . . . . . . . . . . . . . [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)
							8b086b010ce4454f89da16065af45b1efc82aa98
 . . . . . . . . . . . . . . . . [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 (41 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www1.essex.ac.uk'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www2022.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 (244 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (241 bytes)
							00ef00760048b0e36bdaa647340fe56a02fa9d30eb1c5201cb56dd2c81d9bbbfab39d884730000018c14fe7ed900000403004730450220346b9cf3b5bebc7c4207995bf34df20872f2e2e967768fa2e41d8aa89fbf17d40221009c640da52e2548a4b60d79842c27185dd50c552a3edb6997374856a1fa284a56007500eecdd064d5db1acec55cb79db4cd13a23287467cbcecdec351485946711fb59b0000018c14fe7ee4000004030046304402205953772948ac60d2b9a93ed5a47715450a1ce4ed16f4a312f801c80feefffd51022076042d093efe910ad2fec9ba96a097f912605c55e9ce93657b817edbae509700
 . . . . [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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