DV SSL/TLS Certificate for www.drthomasnguyen.ca

Certificate is witin its validity period

Issued by Let's Encrypt (R10)

About the www.drthomasnguyen.ca DV SSL/TLS Certificate

This certificate with serial number 05:a2:05:1a:87:62:f2:fd:61:c8:1c:5f:cf:0e:c5:7b:ec:bf for www.drthomasnguyen.ca was issued on by Let's Encrypt.

With 2 subject alternative names, this certificate can be used to secure multiple FQDNs. This DV SSL/TLS Certificate is currently within its validity period but we haven't checked the revocation status of this certificate, you can do this simply on revocationcheck.com. We have found some issues with the compliance of this certificate, they are be shown below. We hope this DV SSL/TLS Certificate review for www.drthomasnguyen.ca provides you with the detailed information you were looking for.


We have identified some issues with this certificate:
  • 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)

Let's Encrypt

Organization: Let's Encrypt
Country: US

This X.509 certificate will expire on

Certificate Details

Serial Number (hex): 05:a2:05:1a:87:62:f2:fd:61:c8:1c:5f:cf:0e:c5:7b:ec:bf
Serial Number (int): 490693956985655368910812527303190246059199
Serial Number Length: 139 bits, 18 octets

Subject Key Identifier: 74:a1:1d:20:d1:79:b9:33:6e:30:07:92:22:80:c3:e9:88:d2:14:d7
Authority Key Identifier: bb:bc:c3:47:a5:e4:bc:a9:c6:c3:a4:72:0c:10:8d:a2:35:e1:c8:e8

Fingerprint (SHA-1): 78:c0:09:d4:88:1a:80:34:5f:2e:e3:c2:e7:58:16:c6:93:52:11:69
Fingerprint (SHA-256): e7:b3:34:49:f9:25:5f:ef:11:25:54:84:c6:32:2e:e8:23:09:72:f2:76:55:c1:0e:e7:54:58:27:53:72:23:74

Issuing Certificate URL: http://r10.i.lencr.org/

Revocation Information

CRL Distribution Point: http://r10.c.lencr.org/64.crl

Check the revocation status for certificate www.drthomasnguyen.ca
2
DNS Names
0
Email Addresses
0
IP Addresses

Advanced Certificate Properties

Technical details of the X.509 certificate for www.drthomasnguyen.ca

Public Key Algorithm
RSA
Key Size
2048
Signature Algorithm
SHA256 with RSA
Key Usage
Key Encipherment
Digital Signature
Extended Key Usages
Server Authentication
Client Authentication
Extensions
10
CA Certificate
This is not a CA certificate

Subject Alternative Names

X.509 Certificate

The complete raw X.509 certificate details for www.drthomasnguyen.ca in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAu9Zv8UPv03Xfar0syHnd
V+NL3KVYS/tGKujTyi9MmJFItkHNZnCHmsMLIkgEHeK+FaYhy9gnwX79JUS9gXXv
9unfLa2+qFkNo9zDeJxHE6ePQpp/maLU9yCHj3wV1+XYUxLbv5vM9/r3x3dLuxQl
pokMemK9k66cAFHTV5Z3ffpDLlQbVzekIsfzlbVbxO3zDTgAPJ7UufmnAC407fgF
LE0es9AIc8iYZRjQc0NWv1ApD0gZc850fDsw4/BLt3eOaydq7+7mfHY1QHA2Q7RA
We3VM4i0BXll4UEAr00DG69RsypWEIVR5EHClJ/XiKP8jLe/NvqR2aQRwPNEe2Xs
lwIDAQAB
-----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 490693956985655368910812527303190246059199
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.113549.1.1.11
 . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'R10'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2025-05-20 14:21:02 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2025-08-18 14:21:01 +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
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'www.drthomasnguyen.ca'
 . . . . . . . . [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
 . . . . . . . . . . . . . . . . [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 23712305990132209534335368655477396183303898525818376003586579828258205585945232516394752100676946943625178214362253263962042779197683526567842794186583920848192672280696933628059850463285327389254038897874911995047397017183493453225056038726753554702353866424896554370082998414623818490397485830393253710838444594187519055135099980907593111740795045977160171191150573767474985665264889938675935997296159529502650355421909634918019002231767222329285975902339668693976136595653099898055213194424294713210458169396186599621194149531641703278095056264030763738050590689091506395308993895229885401727616654796239931829399
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.3.2
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.19
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (22 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (20 bytes)
							74a11d20d179b9336e3007922280c3e988d214d7
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.35
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (24 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|false] OtherName bbbcc347a5e4bca9c6c3a4720c108da235e1c8e8
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.1.1
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (39 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.48.2
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://r10.i.lencr.org/'
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.17
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (44 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'drthomasnguyen.ca'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.drthomasnguyen.ca'
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.32
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.31
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (39 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|true] OtherName 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|true] OtherName 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://r10.c.lencr.org/64.crl'
 . . . . . . . . . . . . . . . . [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 (245 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (242 bytes)
							00f00075000de1f2302bd30dc140621209ea552efc47747cb1d7e930ef0e421eb47e4eaa3400000196ee474d7b0000040300463044022007936f6ca61dc2e10ad32befab7ceb078b5e45d814df999f74505c59e731b324022008d7524fc845e463a2cc1730bc8d77631da3aafaf0b3308be1875970242a1d8500770012f14e34bd53724c840619c38f3f7a13f8e7b56287889c6d300584ebe586263a00000196ee474d710000040300483046022100e1a68a96a1a0366f26f212c6acc297ae342000c6fafa8c03b7f59bb6c9334ce8022100f2197303271bc87b6350bcb6812a98dbcf172febe5e2246951b499b373365e0d
 . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.113549.1.1.11
 . . . . . . . . [c:0|t:5|false] NULL []
 . . . . [c:0|t:3|false] BIT STRING (2048 bits)
		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