www.tkl.cz

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:20:69:8d:f9:60:3a:44:70:a2:ad:5f:df:a0:72:f9:80:17 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.tkl.cz

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:20:69:8d:f9:60:3a:44:70:a2:ad:5f:df:a0:72:f9:80:17
Serial Number (int): 272366199648109168128116803838454909206551
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 30:cf:7e:e9:15:71:38:a4:96:22:cc:9b:2a:3c:38:dd:fa:19:79:00
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): bf:eb:78:a0:f3:f4:59:6d:c8:de:57:25:32:a4:f5:94:9e:1c:69:9e
Fingerprint (sha256): f7:53:4d:41:d4:52:79:c2:e3:25:e5:dc:46:37:8c:5f:38:68:31:8b:66:55:88:ba:fa:7c:54:ac:cf:34:77:c1

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.tkl.cz

2

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for www.tkl.cz

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

tkl.cz
www.tkl.cz

Other certificates including the domain name tkl.cz

(limited to 100 certificates)
www.tkl.cz
tofu.tkl.cz
www.tkl.cz
tofu.tkl.cz
www.tkl.cz
tofu.tkl.cz
www.tkl.cz
tofu.tkl.cz
www.tkl.cz
www.tkl.cz
tofu.tkl.cz
tofu.tkl.cz
tofu.tkl.cz
www.tkl.cz
tofu.tkl.cz
www.tkl.cz
www.tkl.cz
www.tkl.cz
public.relations.cz
tofu.tkl.cz
tofu.tkl.cz
www.tkl.cz
tofu.tkl.cz
tofu.tkl.cz
tofu.tkl.cz
tofu.tkl.cz
www.tkl.cz
www.tkl.cz
public.relations.cz
tofu.tkl.cz
www.tkl.cz
www.tkl.cz
public.relations.cz
tofu.tkl.cz
tofu.tkl.cz
www.tkl.cz
www.tkl.cz
public.relations.cz
www.tkl.cz
tofu.tkl.cz
tofu.tkl.cz
www.tkl.cz
tofu.tkl.cz
tofu.tkl.cz
tofu.tkl.cz
public.relations.cz
www.tkl.cz
www.tkl.cz
tofu.tkl.cz
public.relations.cz
tofu.tkl.cz
www.tkl.cz
public.relations.cz
www.tkl.cz
www.tkl.cz
tofu.tkl.cz
tofu.tkl.cz
tofu.tkl.cz
public.relations.cz
www.tkl.cz
www.tkl.cz
www.tkl.cz
www.tkl.cz
tofu.tkl.cz
www.tkl.cz
tofu.tkl.cz
tofu.tkl.cz
public.relations.cz
www.tkl.cz
www.tkl.cz
www.tkl.cz
tofu.tkl.cz
tofu.tkl.cz

Certificate

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

Certificate (PEM)

-----BEGIN CERTIFICATE-----
MIIFVTCCBD2gAwIBAgISAyBpjflgOkRwoq1f36By+YAXMA0GCSqGSIb3DQEBCwUA
MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD
ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xOTA3MTUyMjUxNDdaFw0x
OTEwMTMyMjUxNDdaMBUxEzARBgNVBAMTCnd3dy50a2wuY3owggEiMA0GCSqGSIb3
DQEBAQUAA4IBDwAwggEKAoIBAQDMWcDuq35wR4PBmECTeX2ErwIWf9x2U4RRqKUW
W3OFo92/gGCY7Js4BA/dOaHU+PseL9ps/WMSNvy01j0u4V79xig5KPDsmqQI7f+K
wrESHhO0TIlLIMU9Zrqwtks4JtFI/CQTH2qr4A8jMFBaW9qMX1L5TA2enkEHeKQ7
25H7thmf0RKsJ67Wb5UPGM0+U4edpuz/XRWNLnvAe0bD5zc6v7QkbWtEh5n1iE6+
PpNv4ZAtonw06wrxkmtvJle+sCrIwrFSpDZKLEy6doMQCQn75KcliDMs4GtvN0Gx
KUoCSJRuGwsRC4HDspoAgSgWrTctTXLg3FF+XeCgAKmU8/clAgMBAAGjggJoMIIC
ZDAOBgNVHQ8BAf8EBAMCBaAwHQYDVR0lBBYwFAYIKwYBBQUHAwEGCCsGAQUFBwMC
MAwGA1UdEwEB/wQCMAAwHQYDVR0OBBYEFDDPfukVcTikliLMmyo8ON36GXkAMB8G
A1UdIwQYMBaAFKhKamMEfd265tE5t6ZFZe/zqOyhMG8GCCsGAQUFBwEBBGMwYTAu
BggrBgEFBQcwAYYiaHR0cDovL29jc3AuaW50LXgzLmxldHNlbmNyeXB0Lm9yZzAv
BggrBgEFBQcwAoYjaHR0cDovL2NlcnQuaW50LXgzLmxldHNlbmNyeXB0Lm9yZy8w
HQYDVR0RBBYwFIIGdGtsLmN6ggp3d3cudGtsLmN6MEwGA1UdIARFMEMwCAYGZ4EM
AQIBMDcGCysGAQQBgt8TAQEBMCgwJgYIKwYBBQUHAgEWGmh0dHA6Ly9jcHMubGV0
c2VuY3J5cHQub3JnMIIBBQYKKwYBBAHWeQIEAgSB9gSB8wDxAHYAdH7agzGtMxCR
IZzOJU9CcMK//V5CIAjGNzV55hB7zFYAAAFr+Aym9wAABAMARzBFAiATMtAiKXTs
4C8lfv7JfzadjZrvfW7dci6Ff0zD9WKKrQIhAOM2dMKdR/0wi1T3tBsnSUOfZRYX
kq5HrLwYpQqb8qcuAHcAY/Lbzeg7zCzPC3KEJ1drM6SNYXePvXWmOLHHaFRL2I0A
AAFr+AypBwAABAMASDBGAiEAqh0ovubAaTPgevhJzXGyrAox4DQ8MELEZmwUS8/7
wdACIQCp4QA85P/oKpYV6+MoD9FIZt6GsEzI6CpBerF76igfKDANBgkqhkiG9w0B
AQsFAAOCAQEAgAQRQ3GUwsct6zQwM4zklMxzoi11nN/I7c1++8Dx/SQRBJ2iQREf
bPPXmWTds0bXRXPActqjTeJHKj3qwOMrjke3O9vJ8lwFJhZM7+A8xM+9uCZ61gSF
7aFUs5jAHc/brdja67BZ3RGBfAWAIaocvTYIuWmR+vfn7bQv+0ZG//nxLYO6fbh+
09qL28xY5AB8OP8j1n6vdatPUiOZQGp42XuwzKMTOUaCieVJqudV+S3CHy1DdRvm
CGIZ4FjA4fkjIIqLrDR1TfZjLguKlvxJzdum9E/z6GXG1r/KwcPSBmGVpPFkql4+
bk8lIwSjjHEFDhCUexVrGIGjcrldiAgNkw==
-----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAzFnA7qt+cEeDwZhAk3l9
hK8CFn/cdlOEUailFltzhaPdv4BgmOybOAQP3Tmh1Pj7Hi/abP1jEjb8tNY9LuFe
/cYoOSjw7JqkCO3/isKxEh4TtEyJSyDFPWa6sLZLOCbRSPwkEx9qq+APIzBQWlva
jF9S+UwNnp5BB3ikO9uR+7YZn9ESrCeu1m+VDxjNPlOHnabs/10VjS57wHtGw+c3
Or+0JG1rRIeZ9YhOvj6Tb+GQLaJ8NOsK8ZJrbyZXvrAqyMKxUqQ2SixMunaDEAkJ
++SnJYgzLOBrbzdBsSlKAkiUbhsLEQuBw7KaAIEoFq03LU1y4NxRfl3goACplPP3
JQIDAQAB
-----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 272366199648109168128116803838454909206551
 . . . . . . . . [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 2019-07-15 22:51:47 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-10-13 22:51:47 +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.tkl.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 (2160 bits)
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 25796873383416128487669565079691356083586554158989857895980595568222651368635338070489555504223658664916717319926294634799596668372578798957428959459671214006455698898922517741045235472855876019036275765463198788204409405886621642810311165355155913716930218613462639432991934162006901495849852737144199624495190134332875131147439213136676245768205350169013770102111056383629524527491725545020248421436382519735605910484926358162036792616411525426814324485763632952455614910289190640991641083192634463250683970169772259353117738782963576978393563392385727084015697696383623954666656902250076266345308671662922241668901
 . . . . . . . . . . . . . . . . . . . . [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)
							30cf7ee9157138a49622cc9b2a3c38ddfa197900
 . . . . . . . . . . . . . . . . [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 (22 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'tkl.cz'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.tkl.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)
							00f1007600747eda8331ad331091219cce254f4270c2bffd5e422008c6373579e6107bcc560000016bf80ca6f7000004030047304502201332d0222974ece02f257efec97f369d8d9aef7d6edd722e857f4cc3f5628aad022100e33674c29d47fd308b54f7b41b2749439f65161792ae47acbc18a50a9bf2a72e00770063f2dbcde83bcc2ccf0b728427576b33a48d61778fbd75a638b1c768544bd88d0000016bf80ca9070000040300483046022100aa1d28bee6c06933e07af849cd71b2ac0a31e0343c3042c4666c144bcffbc1d0022100a9e1003ce4ffe82a9615ebe3280fd14866de86b04cc8e82a417ab17bea281f28
 . . . . [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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