www.davidfeldmanphd.com

Issued by R3

About this certificate

This digital certificate with serial number 03:ee:e1:1e:9b:50:c9:40:f1:23:5d:36:89:f1:e8:2c:4e:b1 was issued on by Let's Encrypt.

With 2 subject alternative names this certificate can be used to secure multiple fqdn's. 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=www.davidfeldmanphd.com

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate will expire on

Certificate Details

Serial Number (hex): 03:ee:e1:1e:9b:50:c9:40:f1:23:5d:36:89:f1:e8:2c:4e:b1
Serial Number (int): 342623296340595482924506351115930778226353
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 37:2d:c2:c7:24:08:06:a9:13:4a:31:1a:96:3c:10:15:b3:ef:36:0b
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 08:55:6c:6d:87:11:3b:f9:d5:72:d2:ae:90:e6:ce:4a:89:0e:7a:5c
Fingerprint (sha256): d0:c3:dc:d6:8e:3b:ba:3e:33:df:53:59:d5:e5:67:93:af:4d:e4:f8:2f:c1:54:97:3b:87:0c:8f:91:84:f2:fe

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

Revocation information

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

Check the revocation status for certificate www.davidfeldmanphd.com

2

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for www.davidfeldmanphd.com

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

davidfeldmanphd.com
www.davidfeldmanphd.com

Other certificates including the domain name davidfeldmanphd.com

(limited to 100 certificates)
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www.davidfeldmanphd.com
www.davidfeldmanphd.com
www.davidfeldmanphd.com
blog.miyauchi-akira.app
davidfeldmanphd.com
www.davidfeldmanphd.com
www.tychoinvesting.com
credxl.com
www.noabook.com
partner.plumboard.io
app-admin.winner.com.br
sufferfest.bike
swingapp.net
www.davidfeldmanphd.com

Certificate

The complete raw certificate details for www.davidfeldmanphd.com in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEArAfk/KHWQvdZpRfM7/zB
1s/Iqp95R8JvbDOHG+DNDf9Of8oFx9EhfzKzkrwdqD4sTOk3sL6xgy2H8UIL2VEA
OscMoCeM+Tc1Pe5U7GbbdYeTFARMCb6/fpDKvNygMgbxDVkMgRRIHQYW12unWs+l
tZkzuRge/0h3kmQOD9GL0JNxnXiGJzSzgiYmfm59JEpirsAaymoQZ0/vem2IkRIX
e90yo3Jk4g42UPyVmXdizDKX5wqLSzIdSdJvE3caq+bVR0AtERyr5k8DNdSoEtSF
+C7pqM7K3VeX8/xFvtjm8RBPjmzH3PNdjqgLK6VGpabxmLOWQ6SKRsQc3p45MASM
KwIDAQAB
-----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 342623296340595482924506351115930778226353
 . . . . . . . . [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 2024-04-23 00:01:00 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-07-22 00:00:59 +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 'www.davidfeldmanphd.com'
 . . . . . . . . [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 21716881367272439282878895899021421826350318376140911724129970692430845752241582508144564373175611177671748808528305252581398718093306269797254177695794465724899898965195082405604449365280680590632914046039628952938279690143450443403245205713761715265674897685767578048628110187211034768070047540050293239031902545837073453514670052512189525516202786909631322634859775078126311500369792669180654672342853026196587680391811765388438746087899959570449851092624145832508136811844226406546878438652752989822294255811522829433086335025506324958710383890231338619731677394756514757522222876663912774393448374989396138822699
 . . . . . . . . . . . . . . . . . . . . [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)
							372dc2c7240806a9134a311a963c1015b3ef360b
 . . . . . . . . . . . . . . . . [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 (48 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'davidfeldmanphd.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.davidfeldmanphd.com'
 . . . . . . . . . . . . . . . . [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 (245 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (242 bytes)
							00f000760048b0e36bdaa647340fe56a02fa9d30eb1c5201cb56dd2c81d9bbbfab39d884730000018f087869d2000004030047304502203fd52b968512f9e70a51808408fa4fde0e2194fa2c9bfb00d69b8cf0e5b3f575022100966514af0146f07f5f5189a786434321b9f9336b22b011f68e5fb2aaa8b56394007600dfe156ebaa05afb59c0f86718da8c0324eae56d96ea7f5a56a01d1c13bbe525c0000018f08786a9e0000040300473045022042bae64fff59293943f8d5d8d577160b2b518480ccba0e5a4baf9e3d0228888b022100bd1613c79d80a1a79db0a973e9c2847acc59771f48937c74c86faea53575248c
 . . . . [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)
		00a45d85e4010fb8819d8a0c8aa44b575fc56e6fdf63f186d8984840e4c80c21d1a162deb437ee5f6cd6d052a294a9cd5ff514eec3411846f96c921a57e558c2e5600e1d590d14ea47f7a89d2ea948fdd83d141998a3e21ab39d4c1a7d52de0ee2ecd861c7c72489fd9310f28f3216c191f3c60c9f8d98aba604a5e22d0f61b0d53e59755cc93ddc8b6c7d1127393fe0ee6e362b7c5c2cb4a1a17377c8149cdc2eafdc1a9b749ab1eb29c54b9620ff34d574ebf63c9da15997dea988534c45199212e3eeced874fde254add5daf6efe8c9cef19c508801929eaa2b44ac131ba70e9751dfa4e050ecf653d0975d8a0b7c2bb3db1b2eef30b4677b360216e83d9898