www.tkl.cz

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 04:ab:8d:d8:65:9d:de:35:72:ab:79:9b:c9:8d:a2:95:f9:f3 was issued on by Let's Encrypt.

With 4 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): 04:ab:8d:d8:65:9d:de:35:72:ab:79:9b:c9:8d:a2:95:f9:f3
Serial Number (int): 406825973215079542269899782367985616157171
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: 54:7a:a6:08:2a:60:b7:b1:4d:1c:70:3f:32:7c:cb:91:84:75:2a:09
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 64:51:3f:d0:08:be:3c:00:a4:9b:23:d2:1f:02:b0:af:dc:24:b6:70
Fingerprint (sha256): c8:22:68:1c:6c:50:71:69:c7:01:c8:09:aa:82:74:7c:1b:50:f5:9e:6f:f9:ec:a5:76:e2:ad:f2:41:1f:d5:6a

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

4

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

lekarpocitacu.cz
seitan.tkl.cz
www.lekarpocitacu.cz
www.tkl.cz

Other certificates including the domain name tkl.cz

(limited to 100 certificates)

Certificate

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

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA7AzdusK+A5rxkDKveuHB
s1KoovutbNl63mWu1eaDiC77ppuzs/LBCPTBFx+WeFy3RTYtYxHzccqhvn7LkC/X
t6Kgf2bVm46hdhZ8ptxUIxybTb1Zc2nbio11OsGmn5ze+P6hGu9AZSsBsAdh/mey
59VMczgeI7HNKsoKV+tPdYKALg3EMqTHFYBelCv1I5ZXUaovAp/C8QaefXqMZfp/
9BmpoRaGxQH6Uv/vEYrp4xU/WvcNLruMJzKkM+0XgKTDaUsntn1FYWGOxoyamXr2
E0ZoB0IfmJSSS6uJDvX25AWfdvlIJerXeliv+zvuyXJEzajVDyn35Nsw1Np6PMu5
yQIDAQAB
-----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 406825973215079542269899782367985616157171
 . . . . . . . . [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 2018-09-30 21:00:49 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2018-12-29 21:00:49 +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 29798584497645851308855584940310195565793079450726856346201148480689612183718027554505702822859183292569815586471862623067913536193779157082744252278038602181083123217876150765720835240254590653620973608632673147715082178184721910616239512816459548830802835854825753822165823998964950216642357460817383807198717386312566952863351323062228362606562155885016538778715714411537840191574597801481946249885902870595774945705755220912468972536923927414001709220252044707931740616174425143285345102646303392307566155366296995715116258143898952516756686741335350213204528322852346421545889915198063881706908610145205443344841
 . . . . . . . . . . . . . . . . . . . . [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)
							547aa6082a60b7b14d1c703f327ccb9184752a09
 . . . . . . . . . . . . . . . . [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 (69 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'lekarpocitacu.cz'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'seitan.tkl.cz'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.lekarpocitacu.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 (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 1.3.6.1.4.1.11129.2.4.2
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (245 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (242 bytes)
							00f0007700c1164ae0a772d2d4392dc80ac10770d4f0c49bde991a4840c1fa075164f63360000001662c7f90570000040300483046022100efd50f1d0eeb252deeb44e341da125b2a59fc04fc4fde363a0bce8a20995d18002210091d44cdf1c847b0ea33b49f9ae57a88dc2ca114778fa51c8db4a75ff633dad75007500a4501269055a15545e6211ab37bc103f62ae5576a45e4b1714453e1b22106a25000001662c7f904d0000040300463044022007417d5fc5c93699a387523a856eaeb6c2da53d5278fade0b6c12b3d65259dfe02202f8662b4198839b7002bc2a5dfc3ac58704bedac4ce6915571340702f4872e57
 . . . . [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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