istars.cz

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:76:8d:8e:cf:a0:19:19:73:79:ea:41:fa:4b:09:d7:8e:97 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=istars.cz

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:76:8d:8e:cf:a0:19:19:73:79:ea:41:fa:4b:09:d7:8e:97
Serial Number (int): 301678339756654125564042767686027059891863
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: b4:8c:f4:5d:a4:6d:c6:31:91:e2:f1:74:d8:3b:1d:8d:ce:0b:55:63
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 21:7e:27:b6:4e:66:66:52:60:d8:c7:d0:ec:32:e7:87:5a:b8:f3:43
Fingerprint (sha256): 0c:b7:15:66:50:dc:c9:27:f2:15:73:fd:59:82:ef:7a:32:22:a3:5c:20:10:43:5f:96:bb:f1:f7:b9:6a:5d:9f

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 istars.cz

2

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for istars.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

istars.cz
www.istars.cz

Other certificates including the domain name istars.cz

(limited to 100 certificates)
istars.cz
istars.cz
istars.cz
istars.cz
istars.cz
istars.cz
istars.cz
istars.cz
istars.cz
istars.cz
istars.cz
istars.cz
istars.cz
istars.cz
istars.cz

Certificate

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

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA2435OHezkenXM9qMvWT0
KVxrEGnXi0KbNZswq7MNEuZYxcyiLd3v+HvNzlfbUIGnGzx7r7FmhAdhD6Kv6WcO
cJeqQSYX4CbvjAiLN4JmxI2OCyIP83PwUpwRG9so/z1RqB3psY+7bygSVpekyhIm
eYdx9eUQUjcoFedB2UXtkeFlfsmTiBq/3UG95Ivi8+vnzpJB7YV1x/dlhccLg/p3
Idw7MfJtMe2Qf64/YxeBEVzVoGGbKHKgba6EGmijOdPcDqqNsFbn2CfzV8fF0pO/
zj/tgquHNzsQbSxVJLdOOWklTKRhU/GE9MQcfBQUA/buYz3BU1omDu8VciIeD8M6
NwIDAQAB
-----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 301678339756654125564042767686027059891863
 . . . . . . . . [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 2019-12-30 01:06:23 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-03-29 01:06:23 +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 'istars.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 27716198538531113831180052331596717061536749581786901505601688696799695258269542037694564235708267638954005815941545667151492150320406024591952518614847907836148835422392452824299390476657137476182974445335214573511153223636909577743172347005810728146966097309435548594682307921783122936691971272312249512817133313150025852177832974684422470475512056740596123912642940573207216645689190803168413911404697345364095014453888363573935571244337012600473759903925742890950691896101145097202587745119013564531378776161397045028005341796437137514597843776698715789632877071358303198637843771930474926235462676937037616200247
 . . . . . . . . . . . . . . . . . . . . [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)
							b48cf45da46dc63191e2f174d83b1d8dce0b5563
 . . . . . . . . . . . . . . . . [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 (28 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'istars.cz'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.istars.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)
							00f1007700f095a459f200d18240102d2f93888ead4bfe1d47e399e1d034a6b0a8aa8eb2730000016f548de6890000040300483046022100fe7758d10423cbf5ccedb28bb5b9e11f3c6b95f74b0e628e11f508fa944b4ee7022100cfa48575b880b38f4e0c986a5d9527959ff4a939f05859ac00d9d4e62163243500760007b75c1be57d68fff1b0c61d2315c7bae6577c5794b76aeebc613a1a69d3a21c0000016f548de6ad00000403004730450220536b7526669dafd80065c333b92f4d98cc489b0da4908ba4fa8adaee79dc57fa022100b58bd52911bc6cb942a4314bbe0bb7cfcaa61494b5aa5ccc2acaf81f0db686c1
 . . . . [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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