richmond.ac.uk

Issued by E1

About this certificate

This digital certificate with serial number 04:dd:8b:ca:f1:cf:e9:db:4a:b9:08:e4:81:c8:bd:89:bb:18 was issued on by Let's Encrypt.

This certificate is currently not expired, we haven't checked the revocation status of this certificate but you can do this simply on revocationcheck.com. 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=richmond.ac.uk

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate will expire on

Certificate Details

Serial Number (hex): 04:dd:8b:ca:f1:cf:e9:db:4a:b9:08:e4:81:c8:bd:89:bb:18
Serial Number (int): 423837363256481233588832545817878365584152
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: de:36:f4:cd:07:17:3b:b1:08:34:21:d7:e4:0a:db:7f:3e:d0:ca:13
AuthorityKeyId: 5a:f3:ed:2b:fc:36:c2:37:79:b9:52:30:ea:54:6f:cf:55:cb:2e:ac

Fingerprint (sha1): 23:38:d5:2d:7e:0b:d9:1f:90:91:8e:25:0f:a1:0a:94:22:60:80:92
Fingerprint (sha256): 2e:2a:84:0c:28:75:74:11:e2:4a:97:1e:10:34:0f:19:89:a2:d1:b3:c5:dc:68:f1:7e:65:20:51:8a:b9:d6:80

Issuing Certificate URL: http://e1.i.lencr.org/

Revocation information

OCSP Server: http://e1.o.lencr.org

Check the revocation status for certificate richmond.ac.uk

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for richmond.ac.uk

Public Key Algorithm

ECDSA

Key Size

256

Signature Algorithm

ECDSA with SHA384

Key Usage

Digital Signature

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

richmond.ac.uk

Other certificates including the domain name richmond.ac.uk

(limited to 100 certificates)
blackboard.richmond.ac.uk
viewss.richmond.ac.uk
alumni.richmond.ac.uk
epayments.richmond.ac.uk
selfservice.richmond.ac.uk
*.richmond.ac.uk
selfservice.richmond.ac.uk
webmail.richmond.ac.uk
webmail.richmond.ac.uk
webmail.richmond.ac.uk
library.richmond.ac.uk
careers.richmond.ac.uk
eu-central-1-san1.blackboard.com
my.richmond.ac.uk
alumni.richmond.ac.uk
mis-pc03.richmond.ac.uk
eu-central-1-san1.blackboard.com
argos.richmond.ac.uk
careers.richmond.ac.uk
selfservice.richmond.ac.uk
my.richmond.ac.uk
RUGUEST.richmond.ac.uk
richmond.ac.uk
eu-central-1-san1.blackboard.com
sslvpn.richmond.ac.uk
www.richmond.ac.uk
RUGUEST.richmond.ac.uk
students.richmond.ac.uk
richmond.ac.uk
*.richmond.ac.uk
*.richmond.ac.uk
sschp.richmond.ac.uk
*.richmond.ac.uk
eu-central-1-san1.blackboard.com
eu-central-1-san1.blackboard.com
*.richmond.ac.uk
store.richmond.ac.uk
careers.richmond.ac.uk
mct.richmond.ac.uk
*.richmond.ac.uk
eu-central-1-san1.blackboard.com
careers.richmond.ac.uk
store.richmond.ac.uk
richmond.ac.uk
www.richmond.ac.uk
sslvpn.richmond.ac.uk
selfservice.richmond.ac.uk
blackboard.richmond.ac.uk
webmail.richmond.ac.uk
www.richmond.ac.uk
store.richmond.ac.uk
selfservice.richmond.ac.uk
careers.richmond.ac.uk
*.richmond.ac.uk
careers.richmond.ac.uk
www.richmond.ac.uk
*.richmond.ac.uk
*.richmond.ac.uk
eu-central-1-san1.blackboard.com
eu-central-1-san1.blackboard.com
RUGUEST.richmond.ac.uk
selfservice.richmond.ac.uk
eu-central-1-san1.blackboard.com
www.richmond.ac.uk
*.richmond.ac.uk
selfservice.richmond.ac.uk
webmail.richmond.ac.uk
mct.richmond.ac.uk
viewss.richmond.ac.uk
www.richmond.ac.uk
www.richmond.ac.uk
eu-central-1-san1.blackboard.com
www.richmond.ac.uk
*.richmond.ac.uk
eu-central-1-san1.blackboard.com
my.richmond.ac.uk
selfservice.richmond.ac.uk
SelfService.richmond.ac.uk
*.richmond.ac.uk
www.richmond.ac.uk
my.richmond.ac.uk
www.richmond.ac.uk
www.richmond.ac.uk
blackboard.richmond.ac.uk
store.richmond.ac.uk
blackboard.richmond.ac.uk
my.richmond.ac.uk

Certificate

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

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEDBzrjZsrFysdrxioN/dSHfG8O5jz
Fc+Xgl7lh/KlTszzhTwAqeO57yLhUJKJutsGq4Mi2h9M/DmV+uGyfyb/1A==
-----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 423837363256481233588832545817878365584152
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.10045.4.3.3 (ecdsaWithSHA384)
 . . . . . . . . [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 'E1'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-03-27 10:51:36 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-06-25 10:51:35 +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 'richmond.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 1.2.840.10045.2.1 (ecPublicKey)
 . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.10045.3.1.7 (prime256v1)
 . . . . . . . . . . . . [c:0|t:3|false] BIT STRING (520 bits)
				00040c1ceb8d9b2b172b1daf18a837f7521df1bc3b98f315cf97825ee587f2a54eccf3853c00a9e3b9ef22e1509289badb06ab8322da1f4cfc3995fae1b27f26ffd4
 . . . . . . . . [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 (1 bits)
							0780
 . . . . . . . . . . . . . . . . [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)
							de36f4cd07173bb1083421d7e40adb7f3ed0ca13
 . . . . . . . . . . . . . . . . [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 5af3ed2bfc36c23779b95230ea546fcf55cb2eac
 . . . . . . . . . . . . . . . . [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://e1.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://e1.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 (18 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'richmond.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
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 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (241 bytes)
							00ef0075003b5377753e2db9804e8b305b06fe403b67d84fc3f4c7bd000d2d726fe1fad4170000018e7fc05a9500000403004630440220165cfac2415a01328392bbef2f302ff313ffc8a922a9b279298f2807738e027202207d9b79a7b294db816eb6a14635697dd431f3abeb85d7fa11031f43429fc467ed00760076ff883f0ab6fb9551c261ccf587ba34b4a4cdbb29dc68420a9fe6674c5a3a740000018e7fc05aba0000040300473045022100abe763b20306397a8bb3b919f8a644e64b700468414a7fce4dc7617ed194d56002201c7835501953d80aaa5300f6ee83c45954dcd22a7495287577e38079df60b63b
 . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.10045.4.3.3 (ecdsaWithSHA384)
 . . . . [c:0|t:3|false] BIT STRING (832 bits)
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:2|false] INTEGER 27138011480142860294426925279165909951378499818617046738753219499285138921574811195916424295284472460012211053743641
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