tofu.tkl.cz

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:c9:b3:ff:81:f6:35:e1:13:4c:1e:01:a3:a0:db:37:99:b1 was issued on by Let's Encrypt.

With 5 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=tofu.tkl.cz

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:c9:b3:ff:81:f6:35:e1:13:4c:1e:01:a3:a0:db:37:99:b1
Serial Number (int): 329972872029271439072838585572484047149489
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: d4:2c:7f:78:43:55:f3:81:63:b5:79:15:26:ca:16:ef:13:46:fe:31
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 99:bc:57:dd:27:e9:f8:a5:4c:20:e1:24:20:09:28:64:11:99:10:1c
Fingerprint (sha256): e4:da:48:6f:78:b3:42:28:6c:75:0e:b9:36:90:16:e5:38:4a:6e:c0:10:d9:b7:d2:4a:06:8e:9d:a9:19:65:32

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 tofu.tkl.cz

5

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for tofu.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

8 extensions
No unhandled critical extensions

CA Certificate

This is not a CA certificate

Subject Alternative Names

cpr.tkl.cz
mail.tkl.cz
sync.tkl.cz
tkl.cz
tofu.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 tofu.tkl.cz in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA2xdPh4KemHM5tsYSF6nK
uP9At9NFQrom/jBKpASHWa3S3offYffJQAhZJzAl0EjIfnGXi6yuObx8qaGcexcA
XP60/ab/9X5+eKmrrc1mPIU3VBvQFjujYEmjtRQEJBqH6OuYv6jGJYO6m6UTF1ji
R9DLIPA8U9uOWApaUa6vcxFFJmvrdcbJu4JewqKJXLZQ+qPd0iip9RSNVpwPQDCE
prW51Dht9prXGbbXZ9bFeb3jJg1sL3CzP/EZcjcfbOm0KnavUQXzgvb6aBGtXk5s
G2h0foDHiAX0sypX4CwIVnhvZDF5GdFOoeFfBSDn3Xyv9xEYGvOmoQ42VShMDkiF
VQIDAQAB
-----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 329972872029271439072838585572484047149489
 . . . . . . . . [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 2017-11-30 22:03:04 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2018-02-28 22:03:04 +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 'tofu.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 27657683703160078897417616148836454159851639684907613236503466636007259303960464757166452390275464076951041886795970252619534753259795841601001790977409804979665850097676683160950087368393365852156777928332464778120721028684423076372188254527445140118915117391515801276451102382628044803669857982077434970981815431697855223004269097206438245293382730416189397506621661549275972823376978210521184711041072209057564291670579519844158862437887231681322925509029075293171055099946764557710803498070643655573667930558165647713027929943616275878584322433661365542459311737295924238733652343337744708661542871104373914109269
 . . . . . . . . . . . . . . . . . . . . [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)
							d42c7f784355f38163b5791526ca16ef1346fe31
 . . . . . . . . . . . . . . . . [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 (61 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'cpr.tkl.cz'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'mail.tkl.cz'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'sync.tkl.cz'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'tkl.cz'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'tofu.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 1.2.840.113549.1.1.11 (sha256WithRSAEncryption)
 . . . . . . . . [c:0|t:5|false] NULL 
 . . . . [c:0|t:3|false] BIT STRING (2048 bits)
		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