*.chalkdoc.com

Issued by R3

About this certificate

This digital certificate with serial number 04:94:0d:33:3a:9d:9d:34:c4:8c:56:b6:bc:d8:27:34:2c:dd 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=*.chalkdoc.com

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 04:94:0d:33:3a:9d:9d:34:c4:8c:56:b6:bc:d8:27:34:2c:dd
Serial Number (int): 398828479991292099827025424386702007610589
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: f4:7a:09:52:1a:0a:20:41:6c:4c:16:4f:7e:79:87:3a:ed:6c:53:b4
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): a0:5a:40:d3:fe:2a:d8:35:32:bc:7c:cf:24:0b:d6:47:4f:40:dd:ba
Fingerprint (sha256): 72:fa:4e:6a:7b:01:f7:99:b2:58:ae:c9:f8:8a:f9:f8:94:b5:57:73:08:10:f8:20:99:bf:b6:b5:c1:f1:91:07

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

Revocation information

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

Check the revocation status for certificate *.chalkdoc.com

2

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for *.chalkdoc.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

*.chalkdoc.com
chalkdoc.com

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Certificate

The complete raw certificate details for *.chalkdoc.com in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAyfMevYF5BKffDohen83s
QDQQSvkyXgvQ+Ubbca2rc+VXpG+MJSQdQ7awt+F1gOh0v3XWsaNURW06n5pAmVgJ
48WPlRJJJG0tPhJ2yGgaNYnwudKxnjIZR9H26m896mX1F8JVzPlLBoanBKcuW579
AzpGrBEOXw+5AqQPw+XsuSWR8xDHbupjyEIngq1+hGJEPxXorQ37i7InM8y+20Jz
FrWagr8asEQIR6YapDxmH2l8RoSKx0thUoV43eKn7eYhSjZJ0WS3zTWoy8Tsc2Ru
Aj2/JDeL9SUdsJPbILIk67GgcNkl+VKGjy6X9l84l3OBjajunRzTXTvXZK7ZM3aJ
8QIDAQAB
-----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 398828479991292099827025424386702007610589
 . . . . . . . . [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 2024-01-12 07:11:43 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-04-11 07:11:42 +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:12|false] UTF8String '*.chalkdoc.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 25493786277444860190214328791791626839860755054302599461120091820770345310884277317832388507640565955311752230675823829406115879232167736082553950514505808511457953524070147712956769591019979548657413656426055530880199033613748803166853218113170147224561723033176215820361766755872409466942382970771910359839360888492654117382184102829059624880198889487326813089372049788189074164432864887724020256230623551795634765408149580016663686866572102694460912771483750156017270476313698698713571118870869109932959666121477523113788514297047803658876908781152660030575605733625869516495977080474935783399740939733304192961009
 . . . . . . . . . . . . . . . . . . . . [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)
							f47a09521a0a20416c4c164f7e79873aed6c53b4
 . . . . . . . . . . . . . . . . [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 (32 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String '*.chalkdoc.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'chalkdoc.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)
							00f0007600eecdd064d5db1acec55cb79db4cd13a23287467cbcecdec351485946711fb59b0000018cfcba1b0e0000040300473045022100af1666278ef6d27a24076b3b5bd5de7f7d72af6e028ce6457ec831ceb3c3635402206dcf61643d3dfb1402210c072032df054a31bc209e5f7adfca568b11ce4ad09400760048b0e36bdaa647340fe56a02fa9d30eb1c5201cb56dd2c81d9bbbfab39d884730000018cfcba1cd800000403004730450220169d8aca29eaf75deba138a023cff5b892f1494bd8de7a09b48eac2f9b234fc1022100b05397def55259b55b1762f50af691052c41c2d39c58c227ec686734eed4a969
 . . . . [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)
		007adcc8655a44a89f0296a22f047c1329388dc0e52fa8106d06c30396ef35960effbb10e0a6988f4b64b5590cf338accffd44c0b825e824c9dddf78b8e1e4ecb2c1153b1fcfea37f5e8041650439345678e96aa3fac3cf48ce462528e0194ba5ecac989ee1e37cc7484b3b0de0797003ce96c7feb08b0c94eb29a8f6c8d8f5dbfd741ba609683eb1e574d832a0da313dfbae86c24189964df8e7abe0da41b00378cf3dc5f80a00c9a346f2e97f103a6131277ac8c83ad88b4ea5b4fd3f4aaebc919f1824e2469619bc4b0369af616d4f76d72fafb5f05736da142bfefeb34592a02a25dd4d8b9ac05d37df354214fd7d269ab0c94bd90a5d480bf759ecf412653