www.kncar.cz

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:75:3a:61:04:d3:e9:75:f5:d1:5f:aa:27:30:ac:89:33:23 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:
  • Subscriber Certificate: commonName is deprecated. (BRs: 7.1.4.2.2)

Certificate Subject

CN=www.kncar.cz

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:75:3a:61:04:d3:e9:75:f5:d1:5f:aa:27:30:ac:89:33:23
Serial Number (int): 301227493699500376481562692265146178941731
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 85:ec:c5:da:0b:cb:53:8b:1d:aa:37:6c:26:19:c4:10:67:b3:aa:a8
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 5e:d9:70:4e:eb:57:48:2e:50:4b:10:c6:83:6e:1c:b2:34:7d:71:87
Fingerprint (sha256): ab:97:38:c0:16:08:c3:af:5b:83:dd:8e:7a:d4:f0:4b:7e:40:f2:79:d3:a0:90:39:b0:ec:f0:90:1f:b3:bf:cb

Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/

Revocation information

OCSP Server: http://ocsp.int-x3.letsencrypt.org

Check the revocation status for certificate www.kncar.cz

2

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for www.kncar.cz

Public Key Algorithm

RSA

Key Size

4096

Signature Algorithm

SHA256 with RSA

Key Usage

Digital Signature
Key Encipherment

Extended Key Usages

Server Authentication
Client Authentication

Extensions

8 extensions
No unhandled critical extensions

CA Certificate

This is not a CA certificate

Subject Alternative Names

kncar.cz
www.kncar.cz

Other certificates including the domain name kncar.cz

(limited to 100 certificates)
www.kncar.cz
www.kncar.cz
www.kncar.cz
www.kncar.cz
www.kncar.cz
www.kncar.cz
www.kncar.cz
www.kncar.cz
www.kncar.cz
www.kncar.cz
www.kncar.cz
www.kncar.cz
www.kncar.cz
www.kncar.cz
www.kncar.cz
www.kncar.cz
www.kncar.cz
www.kncar.cz
www.kncar.cz

Certificate

The complete raw certificate details for www.kncar.cz in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----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-----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 301227493699500376481562692265146178941731
 . . . . . . . . [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 'Let's Encrypt Authority X3'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2017-09-19 17:14:00 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2017-12-18 17:14:00 +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.kncar.cz'
 . . . . . . . . [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 (4208 bits)
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 880557380060484087780026462153983316981371335941411548166216752717117262443613007642930264070240541011199298269017623636625856207586853734158825581251435510166398618238300814104367814891335280168318041198691607578782985986645124346657775966717089350369339808946763472697517818041534049622635010549773499640228751418946446414576187329829330979694365000574747734303677694869073106605358380425637980731700243948384605247998909009298616591170599325653655884819659298263035876860559172946067828814340007698873464045787608522659047364261931447884564726388623653365160336823429609893601660161938196857735036221186579582103272324135124144368185655338471377400884643487550053835210400623801788953827477372173302438400991278452165045349046968192725895266662714257625647239620528175741268487617546653431581049466772523735066487404734080842842474978506417697059232110988744003030367443802907040490446002229429194567927587542198370952124471786423138420443495038641573402545728189542876869206377534498236103675997625018190954020918660499228362592941135163209996365506223968378154602828546837455877251891231381671293485134257080774616026631173727383267619615420349536406723191180203768646123196951098022725358704351840141462662811669099153948521307
 . . . . . . . . . . . . . . . . . . . . [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)
							85ecc5da0bcb538b1daa376c2619c41067b3aaa8
 . . . . . . . . . . . . . . . . [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 a84a6a63047dddbae6d139b7a64565eff3a8eca1
 . . . . . . . . . . . . . . . . [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 (99 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://ocsp.int-x3.letsencrypt.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://cert.int-x3.letsencrypt.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 (26 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'kncar.cz'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.kncar.cz'
 . . . . . . . . . . . . . . . . [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 (246 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 1.3.6.1.4.1.44947.1.1.1
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.2.1 (cps)
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:22|false] IA5String 'http://cps.letsencrypt.org'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.2.2 (unotice)
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:12|false] UTF8String 'This Certificate may only be relied upon by Relying Parties and only in accordance with the Certificate Policy found at https://letsencrypt.org/repository/'
 . . . . [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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