c-k.ca

Issued by R3

About this certificate

This digital certificate with serial number 03:37:49:6e:eb:17:65:2a:00:27:04:55:b5:4a:39:83:be:68 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=c-k.ca

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:37:49:6e:eb:17:65:2a:00:27:04:55:b5:4a:39:83:be:68
Serial Number (int): 280149997540498906477685162618918262783592
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: ae:1d:ae:26:4c:76:0f:85:67:ca:53:db:32:e2:b3:50:bc:fb:93:c7
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 48:fa:dc:4e:82:75:0f:bb:2c:01:31:52:c7:a6:23:8e:05:b9:ef:ab
Fingerprint (sha256): d0:58:f3:00:15:c8:46:0a:2a:57:55:f0:0c:a3:bc:88:ba:56:1e:85:a2:5e:66:6a:46:b0:d2:e3:7d:31:8a:91

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

Revocation information

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

Check the revocation status for certificate c-k.ca

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for c-k.ca

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

c-k.ca

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Certificate

The complete raw certificate details for c-k.ca in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAlHhPeXcyZ5hx5Tnvy2j8
XH07WaGBTSoRiUuf4qTNLUH4mFjUX2dTSBCyKHcLMPYI01s/7SYvnlRLwbWEfv3W
fZMamKnQGAs/ol6pj7R5zzUr4Zbl00J3CHGYX1osHopPFzX/oKHmU5PVDfYR/BHZ
svh4zY3DxZ772eQ8vhOPMOX6HIeYIDANrFsao9s51/Q1UoUvIjQ0bjMKpGBm5r+H
H+q2vXqykSfe23bBTb/qTqzjzBzULaVf9cDZSng2aYqdhbE8UXNdonTMlJcgJpl3
APqkvSALQk4QdpDjtXQcEnVHWfk12IqgiEAiSXcz+xmYu1+DiUD8H3hDaHFruDjM
lQIDAQAB
-----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 280149997540498906477685162618918262783592
 . . . . . . . . [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 2023-12-28 03:58:45 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-03-27 03:58:44 +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 'c-k.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 (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 18742596427633776496480706462283960484504984827168690222244115013463970967382954179998560522447907462719281235464856457975059479088410384366617286905207458371903747975671378323913504301713223797270174788903208240860077233045705853258609547393323614784462531703525089404655608691921284338720489787245879362262313008348497928898438690769115493256516763013934454843893241146501632563112357350633451512873352657430913731051027791531993040151260109061496965468080736474463688564815611745639153711739139339288365038510657007281401176247340918369381436096572481944308237202307357077103720821591424918724235812038317404900501
 . . . . . . . . . . . . . . . . . . . . [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)
							ae1dae264c760f8567ca53db32e2b350bcfb93c7
 . . . . . . . . . . . . . . . . [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 (10 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'c-k.ca'
 . . . . . . . . . . . . . . . . [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)
							00f00076003b5377753e2db9804e8b305b06fe403b67d84fc3f4c7bd000d2d726fe1fad4170000018caeca07f700000403004730450220776941617e59c0fc81973aa97b6e5dc40a32c9418ff067ba540fa895e48fd9cd0221008842231ac576e6d568558c41baa5f18c5f7172d8c471806721d281ef578f3a6600760076ff883f0ab6fb9551c261ccf587ba34b4a4cdbb29dc68420a9fe6674c5a3a740000018caeca083b00000403004730450221008d34da36085b86860aecf5975d7fbab0052b140507c41d330b5984494ce49f1b02204d30a5399e1ac20ab1fc17f8a53645f88d7d7581bede2f55970fc1c0922f9e49
 . . . . [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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