students.richmond.ac.uk

Issued by R3

About this certificate

This digital certificate with serial number 04:44:9d:0f:13:02:8d:53:3d:f7:b6:b5:cf:4d:c3:10:63:7e was issued on by Let's Encrypt.

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=students.richmond.ac.uk

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 04:44:9d:0f:13:02:8d:53:3d:f7:b6:b5:cf:4d:c3:10:63:7e
Serial Number (int): 371797111743023888730737368278769593246590
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: bc:64:c5:c4:93:ce:41:18:17:93:9c:e7:c9:0d:96:cf:70:03:1a:30
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): a3:aa:67:6d:bc:30:be:5c:47:2c:47:1e:76:48:87:26:f1:cd:e8:3e
Fingerprint (sha256): 3d:b7:21:1f:19:e0:25:02:53:63:3d:a0:e0:84:4e:f7:7a:09:00:ef:8c:8c:01:5b:79:c9:fe:89:44:e8:26:32

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

Revocation information

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

Check the revocation status for certificate students.richmond.ac.uk

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for students.richmond.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

students.richmond.ac.uk

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(limited to 100 certificates)
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*.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 students.richmond.ac.uk in PEM and ASN.1 format.

Certificate (PEM)

-----BEGIN CERTIFICATE-----
MIIE+jCCA+KgAwIBAgISBESdDxMCjVM997a1z03DEGN+MA0GCSqGSIb3DQEBCwUA
MDIxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MQswCQYDVQQD
EwJSMzAeFw0yMzEyMDcxNDI1MzFaFw0yNDAzMDYxNDI1MzBaMCIxIDAeBgNVBAMT
F3N0dWRlbnRzLnJpY2htb25kLmFjLnVrMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8A
MIIBCgKCAQEAroMoKkTpFMI/1+VSxYorlnnRLlB0czDwXQ994GMPM+gMWdYLL3tV
y9oxA76xaAAsw2QFDmyZLbjTeY2NChZDq+bB53DUxRTkOZq3IUIi24JR+kIU4np4
CLXxoE37C+6K05/U9h+u4M5IadzZZsO9yl0TVqxSItCy72fjKlYOIEIb0eVHw0jd
90z/CTSJ1GACA0ZlKBR1lkmiDEBZtInshPHRezyxZjad5u5Sp55VeKBKJEqH7c2N
ZiYAIk6zys8VborlTS/k5YL0Jk5qfDtAQ37YhK4eLQh3EJZZ+k1sXVxrZroRm8gB
9vsqWN7Vp19b/Nr8wiNIg5qSYl1vjvlD0QIDAQABo4ICGDCCAhQwDgYDVR0PAQH/
BAQDAgWgMB0GA1UdJQQWMBQGCCsGAQUFBwMBBggrBgEFBQcDAjAMBgNVHRMBAf8E
AjAAMB0GA1UdDgQWBBS8ZMXEk85BGBeTnOfJDZbPcAMaMDAfBgNVHSMEGDAWgBQU
LrMXt1hWy65QCUDmH6+dixTCxjBVBggrBgEFBQcBAQRJMEcwIQYIKwYBBQUHMAGG
FWh0dHA6Ly9yMy5vLmxlbmNyLm9yZzAiBggrBgEFBQcwAoYWaHR0cDovL3IzLmku
bGVuY3Iub3JnLzAiBgNVHREEGzAZghdzdHVkZW50cy5yaWNobW9uZC5hYy51azAT
BgNVHSAEDDAKMAgGBmeBDAECATCCAQMGCisGAQQB1nkCBAIEgfQEgfEA7wB1AEiw
42vapkc0D+VqAvqdMOscUgHLVt0sgdm7v6s52IRzAAABjETiT9cAAAQDAEYwRAIg
Pl1ph9DcJvMen7GTagzUUOHs0tf9gysr+MukmK1FNb8CICxxBFsCZi1donHS7ONt
I5gUZ7Uhg9dcSMTSSgcsbTwNAHYAdv+IPwq2+5VRwmHM9Ye6NLSkzbsp3GhCCp/m
Z0xaOnQAAAGMROJQJwAABAMARzBFAiEAuolJzJcfnFkoP2FbU2H3eJ+dTT+O62Kc
fwpf9oNf98ICIDmtbey6LjzHScLEoKcUZr1z5Jgicnz14hBj+kfVQ3NiMA0GCSqG
SIb3DQEBCwUAA4IBAQByu8Kcnp75KyXNmHGO8FJIIkSEukXZFaVz9sBraUVNBD+0
M+XlcYlBLWz6vkOQH0EUAEJLa+ZetqfzKhrn3F8f9CsoHgnuwaxqavsUpxEZqTZ6
fZECCjWSa3gEeo3JzP+kieeKje7ztCZU980Fyo8cqmhd7T7zvUmtvonFQ58+qK74
zqhoXad30fDBTv1A3bYgFiPFAPYOmUiBueDSCmNzX9xUqRyUVMQqJbh6sfLIK7+z
2ruxRxRFdtZ4onlPF/hPp6YcC3sPRQ0TKGhTJbbLO8wEQZ19eTYMLDWXKRhUjuDc
W6UkvJ9D4BJduYl3D3tUSWCfulRbVflCuGSqurNp
-----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAroMoKkTpFMI/1+VSxYor
lnnRLlB0czDwXQ994GMPM+gMWdYLL3tVy9oxA76xaAAsw2QFDmyZLbjTeY2NChZD
q+bB53DUxRTkOZq3IUIi24JR+kIU4np4CLXxoE37C+6K05/U9h+u4M5IadzZZsO9
yl0TVqxSItCy72fjKlYOIEIb0eVHw0jd90z/CTSJ1GACA0ZlKBR1lkmiDEBZtIns
hPHRezyxZjad5u5Sp55VeKBKJEqH7c2NZiYAIk6zys8VborlTS/k5YL0Jk5qfDtA
Q37YhK4eLQh3EJZZ+k1sXVxrZroRm8gB9vsqWN7Vp19b/Nr8wiNIg5qSYl1vjvlD
0QIDAQAB
-----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 371797111743023888730737368278769593246590
 . . . . . . . . [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 2023-12-07 14:25:31 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-03-06 14:25:30 +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 'students.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 1.2.840.113549.1.1.1 (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 22030140939510012271392520259950471743982961759214790935087991291358412216361237413802887641092944659615881773205065920443150986442019434486543530613695563239421330701866055933853923285615360423345670199304662159182320425520572737842362850423444876662841360014551134308669649683947469655773497131610233152674941237520329092507950676106174917181197957597050008944714595183097813320720198503932399803921327638318399782968545362239413163336042425800087613416561894887714959298187130901704347665490545262720021358806754026115365731475194960666892392053373962741091923623414002818791929290096948320871704882715261132162001
 . . . . . . . . . . . . . . . . . . . . [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)
							bc64c5c493ce411817939ce7c90d96cf70031a30
 . . . . . . . . . . . . . . . . [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 (27 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'students.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
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (244 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (241 bytes)
							00ef00750048b0e36bdaa647340fe56a02fa9d30eb1c5201cb56dd2c81d9bbbfab39d884730000018c44e24fd7000004030046304402203e5d6987d0dc26f31e9fb1936a0cd450e1ecd2d7fd832b2bf8cba498ad4535bf02202c71045b02662d5da271d2ece36d23981467b52183d75c48c4d24a072c6d3c0d00760076ff883f0ab6fb9551c261ccf587ba34b4a4cdbb29dc68420a9fe6674c5a3a740000018c44e250270000040300473045022100ba8949cc971f9c59283f615b5361f7789f9d4d3f8eeb629c7f0a5ff6835ff7c2022039ad6decba2e3cc749c2c4a0a71466bd73e49822727cf5e21063fa47d5437362
 . . . . [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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