www.tkl.cz

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 04:3e:de:7c:91:a0:62:d7:95:bc:ac:a8:32:77:86:4a:c0:6f 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): 04:3e:de:7c:91:a0:62:d7:95:bc:ac:a8:32:77:86:4a:c0:6f
Serial Number (int): 369842385889670369652536656152047475409007
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: 5c:16:b1:80:72:09:9d:47:b4:81:b1:ee:68:51:38:73:25:38:f4:6b
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): d3:a3:64:3e:74:9e:3e:4b:68:6a:cb:61:77:07:a7:b6:ef:32:20:80
Fingerprint (sha256): e1:f6:7c:4a:f0:5b:2e:6e:19:d8:97:9a:22:cd:46:b8:24:07:17:bd:7a:2d:fc:c8:6d:b2:f6:ed:a7:4b:5f:7d

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-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEArv9RvFmCvdYXS7SB6nTy
xa9Jfu5NttBEoZpledyd0SyxSjLa7uSiFvLXmwvtFq61IRo8ZOs+d2QUcOd6Zpkm
8AI4K5gXjk83xGWWggr77EWvawyndM8uFFSm7sdkFoSy/mf+9Roqx0KFzMJAIN6Z
llekbBCnZcGCACkyBaQbREcG1CW8Wsxppnn+zK9rfvKYWXQRNkEh89xTUWnK9AF6
UxoFIv6eFdYVFNDl6a9nYDrogNvyOU1K8wnR1mJCRCoddeVQz3lutHvhAE3/QAw7
mtm6aBAUWfYZdjNDaBHOUmDByQ+spPSz/DqbSsseQscovL55xHZ/dDm+fwd+mRH/
oQIDAQAB
-----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 369842385889670369652536656152047475409007
 . . . . . . . . [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 2018-05-31 21:00:53 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2018-08-29 21:00:53 +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 22091367693634623915728071560372452276381201680856471496061183279519700910261724703743279164658927392485749929415329557601756545926778623173007981479738853252053275593127730703928257327633201238696597913215714969064698838523518090482619638129009112342261866898361292789734180919072521183139175557181187828583701382738415077837787504575982533845009255270858945547453594869645510585238467547513519309396019320004249325779385195257387973778217122163040814576537786510004984244118552311624193074790737054130798123397730050105488083151232070501984306408849088058265505173192693592308366112125840985015439820053187740696481
 . . . . . . . . . . . . . . . . . . . . [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)
							5c16b18072099d47b481b1ee685138732538f46b
 . . . . . . . . . . . . . . . . [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 (244 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (241 bytes)
							00ef007500db74afeecb29ecb1feca3e716d2ce5b9aabb36f7847183c75d9d4f37b61fbf6400000163b837c78e000004030046304402207f21c52eac8fb417fc002b80f5172a01bb48188d189cac5add9608d272cf26f3022008441754362170336cebfb973e6cf9094ce4073eb89a80b22253365a77f8a193007600293c519654c83965baaa50fc5807d4b76fbf587a2972dca4c30cf4e54547f47800000163b837c7b60000040300473045022072ad42fd279c0d6cc1d367dde9ec5b5b459ff0becc12e64a70619bce69caf008022100e98f9b7479d4b11a9d2cefae92b892fe2244dee25b1e81bab1bfe1726c7176f1
 . . . . [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)
		00428df6644430d0694a23995db65c8e85473b911cae9d26be5288f3cd496d97f90fb02c66c4b69b7dcc951f99e7e5a1f515e4246fafdddb1185cf5d3fc975c2a94c5bd03e2c1408eebe08e5e2947673da76d4abdc3fe9b963317ee7edf81a99a1fe0b94ce3e7ba214ee7020bc65603831e3615c8d6250ceae021e6347ff01ad10eac5d59da5d0acc59ecd40cde747bca44439de57d943bf0b243df5d875822e3991d4f07acc33f7a372a71c97448d68b57b845373e17cd3c28175c0917328e73328c25340379a47473275d4013339203a6585c285ca2795421f01cb3351bf222e891b61f1f0f30ea839bb72f0e0d767a3fc0fd1c9c9ea95518f56d658dff9eddd