www.kncar.cz
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 04:88:2b:79:83:2d:88:bf:0f:40:f6:5c:4a:3c:26:fa:6e:95 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): 04:88:2b:79:83:2d:88:bf:0f:40:f6:5c:4a:3c:26:fa:6e:95Serial Number (int): 394785333360630498043904271576032840674965
Serial Number lenght: 139 bits, 18 octets
SubjectKeyId: cb:be:8c:82:ae:45:e5:48:46:b1:87:38:42:4d:79:8f:c6:e7:9e:ce
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): 64:7b:21:b5:f6:b9:49:a0:b7:a9:eb:ed:18:89:56:32:c1:ce:65:26
Fingerprint (sha256): 43:b6:7d:7e:bb:de:61:3d:32:a5:e7:d3:87:c5:17:1b:09:40:1b:38:b1:a8:77:77:19:17:ca:2a:b5:58:f5:70
Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/
Revocation information
OCSP Server: http://ocsp.int-x3.letsencrypt.orgCheck 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
9 extensions
No
unhandled critical extensions
CA Certificate
This is not a CA certificate
Subject Alternative Names
kncar.cz
www.kncar.cz
www.kncar.cz
Other certificates including the domain name kncar.cz
(limited to 100 certificates)
Certificate
The complete raw certificate details for www.kncar.cz in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIGWzCCBUOgAwIBAgISBIgreYMtiL8PQPZcSjwm+m6VMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xOTEyMjAxMTI3MjJaFw0y MDAzMTkxMTI3MjJaMBcxFTATBgNVBAMTDHd3dy5rbmNhci5jejCCAiIwDQYJKoZI hvcNAQEBBQADggIPADCCAgoCggIBAOSiAH+chgIpXqjKzM/hCHKci3MSVx7VruXF dgcH+Cz3Uh2OZ0vngioRlmwQ9kdg1r+uQIRkfd8XJB4WDmswAvjL/TnDqAYWkYgy aMKARJa23jKft3bdhAtxVp09oB4Vy41lqDlaZEZVtiaUy/P8cDTZX8QjO1ra34b5 0+h8QrgVyedzbwm0yfGrU4Mv6Vp+ZTKCmhM1qqn4ElqRLZCt6yQxc5nOiNtToySI Th6okMiTQT2PzOzKDnajsj27MZPkKvQjcg/cq0x67fkPtvtRzmXRwYujBUckSOVK /F/vZgCP6/EmSMg6tfutK1bHX4yE0ak8LHyQNX5hXtooWlDYhpkUElOmzOAPQqRD +fMU6vsWq2cNEhmXHJhwwdtzbOgT9DIT02beRqq69fO6n3CZdgrFm9L9UOnsV5e/ /QXQvFdlvLP+aXpVFEj0tICDRn9cI5mhfoWAbPZpBvLibjzlOLDyo8IP939xbdmv Z2IrOUQskbQ22b4C1/Je0AcxHyFBqXgnMmaQVBQo3bMgT+WwqXYudDtl3WQZJ7Za sTMwAjCwSvx/cJnDDKMisDF7KIBAvKtzET+3yrQJPtDN8Qwn0QYKeDYZ2lGKMfdZ 3zmzu+Cf0pE4RGBnLLz4dxy06rbFHqN+++TVH99T9vDv42jzB3Lm3KQwU2qIt1DY p3y15SnJAgMBAAGjggJsMIICaDAOBgNVHQ8BAf8EBAMCBaAwHQYDVR0lBBYwFAYI KwYBBQUHAwEGCCsGAQUFBwMCMAwGA1UdEwEB/wQCMAAwHQYDVR0OBBYEFMu+jIKu ReVIRrGHOEJNeY/G557OMB8GA1UdIwQYMBaAFKhKamMEfd265tE5t6ZFZe/zqOyh MG8GCCsGAQUFBwEBBGMwYTAuBggrBgEFBQcwAYYiaHR0cDovL29jc3AuaW50LXgz LmxldHNlbmNyeXB0Lm9yZzAvBggrBgEFBQcwAoYjaHR0cDovL2NlcnQuaW50LXgz LmxldHNlbmNyeXB0Lm9yZy8wIQYDVR0RBBowGIIIa25jYXIuY3qCDHd3dy5rbmNh ci5jejBMBgNVHSAERTBDMAgGBmeBDAECATA3BgsrBgEEAYLfEwEBATAoMCYGCCsG AQUFBwIBFhpodHRwOi8vY3BzLmxldHNlbmNyeXB0Lm9yZzCCAQUGCisGAQQB1nkC BAIEgfYEgfMA8QB3ALIeBcyLos2KIE6HZvkruYolIGdr2vpw57JJUy3vi5BeAAAB byNG1psAAAQDAEgwRgIhAKAIMj4LM9Vlgnc9O2f/JHvx7zZH8i/arV2WIsgFbJKy AiEA17gQl9sJpv2ZLeRQcDZVLU7gO8NyCcMmnLJnfDhNOjMAdgBvU3asMfAxGdiZ AKRRFf93FRwR2QLBACkGjbIImjfZEwAAAW8jRtbPAAAEAwBHMEUCIE03nxJtoGyv YBsPxtc775AzmZaHY5zbLvXpHm5JmTqIAiEAnAYPN85w6nlcT7EDKZ3c2RC0HE2K agylFNAJ4l1BVbUwDQYJKoZIhvcNAQELBQADggEBAHeegP1Y7iClsI23dsweqqDn dWkuYSGReYF+IkoVhP51efGMFD6bULUd3A5Xd76aDbZPlX6fqKs/nQU+HIT3lkNZ pcd8tSEy5wc3T+PCkBVhsTmWlRyHQnk+qJrKSVRzL/shc/1OBEn9RFy87STJsWZh 0oj8b33Ji7drvbVViAk4AtpMp29kiBzw7S0sTGwzk9hywtw8XkXyF5bstUvgzmR2 bnWEnbw1MFhZS3QtXDxh3Xgmi3VFeLlZxywT8eCa6kB2rFrPV/77LmxvlN4kmwnw ZPgUv7hF1++z1W7h2HIrwQmFOQAOnkB9qoAwihGdSzG1q0TTVox5/Eu5/fiCdjM= -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEA5KIAf5yGAileqMrMz+EI cpyLcxJXHtWu5cV2Bwf4LPdSHY5nS+eCKhGWbBD2R2DWv65AhGR93xckHhYOazAC +Mv9OcOoBhaRiDJowoBElrbeMp+3dt2EC3FWnT2gHhXLjWWoOVpkRlW2JpTL8/xw NNlfxCM7WtrfhvnT6HxCuBXJ53NvCbTJ8atTgy/pWn5lMoKaEzWqqfgSWpEtkK3r JDFzmc6I21OjJIhOHqiQyJNBPY/M7MoOdqOyPbsxk+Qq9CNyD9yrTHrt+Q+2+1HO ZdHBi6MFRyRI5Ur8X+9mAI/r8SZIyDq1+60rVsdfjITRqTwsfJA1fmFe2ihaUNiG mRQSU6bM4A9CpEP58xTq+xarZw0SGZccmHDB23Ns6BP0MhPTZt5Gqrr187qfcJl2 CsWb0v1Q6exXl7/9BdC8V2W8s/5pelUUSPS0gINGf1wjmaF+hYBs9mkG8uJuPOU4 sPKjwg/3f3Ft2a9nYis5RCyRtDbZvgLX8l7QBzEfIUGpeCcyZpBUFCjdsyBP5bCp di50O2XdZBkntlqxMzACMLBK/H9wmcMMoyKwMXsogEC8q3MRP7fKtAk+0M3xDCfR Bgp4NhnaUYox91nfObO74J/SkThEYGcsvPh3HLTqtsUeo3775NUf31P28O/jaPMH cubcpDBTaoi3UNinfLXlKckCAwEAAQ== -----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 394785333360630498043904271576032840674965 . . . . . . . . [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 2019-12-20 11:27:22 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-03-19 11:27:22 +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 932740528301107691347017110293528496855073084309080712803271684179237800408387761660560531441595016834194748759852452199937118779660008912375862853435168450308039101522620357817774134178012547902104407230342460101948678592103046795593342859787871432083979489544915862698588029537462367022590872435244950371626773952227261708429480291457456917481303697884303489014989480448743021059952279746320049064538935814142879580822012141313342569224629346438329683163828011657220265059084282916315991830442395308078543830374026946871835899566955052346192411742594709104723602664204454927302093792710948099718207309650472004399216211600837087479321525057242182594019048021258824406513552000625014634065931312272043619954079670701658784948873297725622822522235373499205227806286506276631510307434726714767848435665052117992756253034450994440420160756515165392047743970188729373919523341774299578025176828067592924158331923078887428396321363006546564128195922461707205436855283993462530035382640506522627304634616577267394455340886953009015435730631497524742870425321317636794388934983815148778721352808457252241338269070863785274745063819340163867969510365008523132338008401608260993766688097919107327367546120426187794610682554447748826350823881 . . . . . . . . . . . . . . . . . . . . [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) cbbe8c82ae45e54846b18738424d798fc6e79ece . . . . . . . . . . . . . . . . [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 (69 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 1.3.6.1.4.1.11129.2.4.2 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (246 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (243 bytes) 00f1007700b21e05cc8ba2cd8a204e8766f92bb98a2520676bdafa70e7b249532def8b905e0000016f2346d69b0000040300483046022100a008323e0b33d56582773d3b67ff247bf1ef3647f22fdaad5d9622c8056c92b2022100d7b81097db09a6fd992de4507036552d4ee03bc37209c3269cb2677c384d3a330076006f5376ac31f03119d89900a45115ff77151c11d902c10029068db2089a37d9130000016f2346d6cf000004030047304502204d379f126da06caf601b0fc6d73bef9033999687639cdb2ef5e91e6e49993a880221009c060f37ce70ea795c4fb103299ddcd910b41c4d8a6a0ca514d009e25d4155b5 . . . . [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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