istars.cz

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:92:eb:a3:c1:62:ae:b0:f5:a9:e7:09:b1:72:84:df:13:8c 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): 03:92:eb:a3:c1:62:ae:b0:f5:a9:e7:09:b1:72:84:df:13:8c
Serial Number (int): 311331302211458629766497635529506311574412
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 8e:b3:6f:f2:02:49:1b:fe:34:76:38:94:c2:f0:1d:49:e7:d5:c0:16
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 63:af:c5:c5:94:f7:9a:67:4b:a7:f6:3e:28:c4:d6:2c:0f:fe:20:bc
Fingerprint (sha256): 6c:c1:10:e9:b8:5a:64:2b:b3:0b:48:b9:40:81:c7:70:14:57:76:ee:7c:87:d0:e1:fe:02:a3:f2:f8:ed:77:03

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-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA4vAkb43A02rxDp26zGcY
DeqcydrEggY9CGFCxzMJRMXL+tZJjFVjsZeorwI4VoPWx7Fdy3tNiPqd3grKUFbb
P0jb3Eua/iE73VDR1g3pA7eYUDukiTZXboVguYfd5oHQskgF4fNnuNko4gf2iGiZ
PRFuu5X8LIiQNc7CMWJDHpdQyBpNCtFqx0b/uyY7xYwgH3vT/HYGPVT+nWtcsTYG
Eo4/Q6dsJICQdiuksp9+cciwSp6c4nxCKSguYn5suLz+WCYIfOX56/FcIYZPkGgL
8tgmoJeYFeRqZ/A67lSzZ9zL16DvM7AIpZaqVWA5uXwwxN6tN7pY6boQEbXseVgP
TwIDAQAB
-----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 311331302211458629766497635529506311574412
 . . . . . . . . [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 2019-07-03 00:05:55 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-10-01 00:05:55 +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 28648275517380590148315752766298566367796180514295159357667819480771035041882697485882805664500485302785148645697338794608494157093935099952408383729447671933875691568199994634495315177003882296740114093574498860759538703989960288569973248837726341231747099661108844995725616636001923982728526603365590467674017445170346640656829210857255682859457061200336030223779203889525335821353827914313182226106658770519098456830447977458909371351111986479899814377961199823652201555570672826031298463685455301456454380431811898077384009318636490916698794907552324520607986339880215340427198599191190064358561889714763862642511
 . . . . . . . . . . . . . . . . . . . . [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)
							8eb36ff202491bfe34763894c2f01d49e7d5c016
 . . . . . . . . . . . . . . . . [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 (245 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (242 bytes)
							00f0007500747eda8331ad331091219cce254f4270c2bffd5e422008c6373579e6107bcc560000016bb55ddd07000004030046304402206c87fa23c75937ffb465ed685e05bcd8583a0224eac329aabe0a77ebde98322502204db726195398aaeefac351fd0704c5ea11f19abe23871ddea77522c11730ce4c00770063f2dbcde83bcc2ccf0b728427576b33a48d61778fbd75a638b1c768544bd88d0000016bb55ddb130000040300483046022100ab2b467e028dd0cf40c08188aa1b64b89c2f1484c167dfe1d2c0bf8ce4efe0c6022100ca8aa50a84c5ffb8dd8d8f902b6387457dabf3b1136f82690d8df94ba4d91b0a
 . . . . [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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