www.kncar.cz

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:7f:2a:fe:c2:dc:5c:77:f3:78:e0:9f:ab:63:70:92:c9:22 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): 03:7f:2a:fe:c2:dc:5c:77:f3:78:e0:9f:ab:63:70:92:c9:22
Serial Number (int): 304609868765711235607003045167771138836770
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 94:77:a4:bd:28:6a:46:cc:e3:22:6d:72:f3:f1:9e:0a:d0:c2:aa:d6
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): f2:34:9f:b6:7d:74:0d:d1:10:83:5a:26:67:d6:76:8a:46:a2:2b:6a
Fingerprint (sha256): 62:32:b3:dc:dd:10:38:f3:f1:af:43:a9:52:01:f2:c0:e6:bf:93:74:0c:9a:95:44:e5:4a:5a:89:38:93:d6:13

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 304609868765711235607003045167771138836770
 . . . . . . . . [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 2018-02-02 06:34:27 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2018-05-03 06:34:27 +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 850818806427974825085396843419290301935315026644589061040228571890721936389982071431694994042218604445112575570992679920993872243576314330896529916347553092520491957621375311861664916160119026112558447184721365919023611596050368267228060058717102840357763945373050296827568105807378160683488584575311450773614032328801868890296174810988433795827093916360941490251484568362247223099510783273087704148310262109963797106290302407748360685046641971849757235666212675365250036516105898988077296625024912599461760070018891706526813767413578949493705323621553069142922974325850041955685911698331452125545954638228692338937151455540659253338468654622139024624973330438654535443792296039570290827658320777623847934232267272515113228954354034805019567123366709658762062385545723758991304205818070269200033986005535043911678609676008380869018594574979450790086928456862080794067416369288527642032079438620277443547475319008942707096468874386001618341877801926232290405775681259120869488629693803021472365629792260899447997723089889637088297967894597319136922137295194461848526224198355816482399471804728754762807439045079885408307252250203350623537820089391470583280290287420245236483437514847236361153468090337730803819913975468838396392836479
 . . . . . . . . . . . . . . . . . . . . [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)
							9477a4bd286a46cce3226d72f3f19e0ad0c2aad6
 . . . . . . . . . . . . . . . . [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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