istars.cz

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 04:12:57:cc:5a:38:2e:b8:bb:2c:ac:de:b9:3d:d6:61:7c:ba 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): 04:12:57:cc:5a:38:2e:b8:bb:2c:ac:de:b9:3d:d6:61:7c:ba
Serial Number (int): 354690930225678408780773570037980059499706
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: 96:c3:6d:b2:66:c8:1f:a2:06:f8:9b:13:25:ff:44:44:63:1e:45:07
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 38:1f:16:0b:38:37:c5:be:b4:19:2f:ae:84:c5:64:68:45:33:d2:02
Fingerprint (sha256): 48:06:8e:3a:13:49:36:07:b9:6b:15:a2:f4:c9:65:00:3c:95:61:c6:96:e2:f6:ba:ac:9d:b6:af:5c:65:37:c4

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
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-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAyuv+YDUdKcU9IWv0N/CP
1ijygO+DuugSwfOzoR3P0/2R2QQOvCEWxHJ5DNGWuqdihraPLVIizMFbacYwqfOG
oFwwYanI1nnKj1hdQ/XVSoceHLhF57bO+uTQLzS1y/wJlpRl0ABCDNIBLQdOpOVA
yy9xfOZQ60sFPD/P/66xKyaw0TIK1EnEg0JTmkjvyswsVcr1iJQD2uHvQ3SS1Tt/
McFi9aLByXWLdxf7CG0eNLpyo9QZHoppMpQF9UXQMkUGjdoJFHGo5Z36DDl8gbts
bQnuTlgjC/QUZPNU32U0tXKUMuFZmViS0QWQM4WjtG99GWoeS038w0swE8WulbVv
uQIDAQAB
-----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 354690930225678408780773570037980059499706
 . . . . . . . . [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 2020-01-31 22:22:19 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-04-30 22:22:19 +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 25616510411949600018031945964569920232495274276876312423493709137082428833114211808540147226663891148358337905371211140143943763011398718111947921838820706323236872515002448478493430365861551213228754610787528612339584097517935743612792355457743500205122584916186086174291651002576536006716250211888535154704240502175060285302179357135805885948657331609423758772754249344632045745623733520492152361893593668351404459400183273422260511347002449965958213956011488638472924694841347745553539409562756466897887716449269448192907806006660499484840698590447915398311463420954787022197391809010277759996367697624921892286393
 . . . . . . . . . . . . . . . . . . . . [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)
							96c36db266c81fa206f89b1325ff4444631e4507
 . . . . . . . . . . . . . . . . [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 (26 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String '*.istars.cz'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String '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)
							00f10077006f5376ac31f03119d89900a45115ff77151c11d902c10029068db2089a37d9130000016ffde98ff50000040300483046022100b9831cef92b13ba42b33fb78523a06729c56dcb832cea763cf3e4958109b8bf3022100aa6f74d606f07c433466ff35e060a29d04bf7821448ab1f5f1ea2a57e7fac67700760007b75c1be57d68fff1b0c61d2315c7bae6577c5794b76aeebc613a1a69d3a21c0000016ffde98ff30000040300473045022100cb3f2e242e01f25bac6cc0a1bff48b93f3d3e5f9daaa05c9a0cf793ad3dfee8402200b9fd95f6317b42469fbac4db8e72048fb3192f2d731432a6448c968844c59e6
 . . . . [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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