www.opportunity.cz

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:c3:42:e4:a6:0a:f5:49:8e:68:7c:79:29:42:8f:93:c1:ea 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.opportunity.cz

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:c3:42:e4:a6:0a:f5:49:8e:68:7c:79:29:42:8f:93:c1:ea
Serial Number (int): 327780835604017479286355169533534982619626
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 12:96:ae:0c:88:b2:f5:87:fc:80:93:41:1e:a4:40:51:72:be:3c:b6
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): f5:c6:15:b5:11:73:5f:5f:7a:ba:17:8f:02:91:05:8e:ed:7a:c3:49
Fingerprint (sha256): 88:ee:b7:76:4c:a9:98:a2:1d:9b:e9:5a:56:b4:49:c5:08:01:77:a6:9a:d0:5e:9b:57:67:d7:27:04:e2:52:80

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.opportunity.cz

4

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for www.opportunity.cz

Public Key Algorithm

RSA

Key Size

4096

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

oportunity.cz
opportunity.cz
www.oportunity.cz
www.opportunity.cz

Other certificates including the domain name opportunity.cz

(limited to 100 certificates)

Certificate

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

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----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-----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 327780835604017479286355169533534982619626
 . . . . . . . . [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 2017-09-19 17:14:00 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2017-12-18 17:14:00 +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.opportunity.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 (4208 bits)
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 604562408215463455526883365881100343589780066398680225203506851916438619816493237122814627365214125846196307775018092188871498715158823031397435449407749546058901979072334504101881754468212416359163372146126273946969006882456122490890473519860130616654711288043258566960071825138859977911435070583902013499282702797843410982220810323349490410710242160616604293027808678498057415585388514157168317971740218430400466993467626987398337639791627869327731770129386813068812252926940953691714539537900194101067302975221115057937305577030299487088864444436289911816704393099690758883750772391754745045309410493750760129624569402211648224040776309653098460208386622123292755929611290609723251944317047072238852917194424722199159410805503940286769400291239153282257384313620542432261743870805270592145180166643931600505539677875344917173503970977612790599336482726040598059271727882734857022414029064647231088124227254285719390013525837419448008849920215296905001106647784918921016321532989342351584063637114918548267592078300409309648591235903277377322172832813579295235525140906580377469724079074533371086652875133383190775730989257576974587913563046893062654477796934953468687428359952968928532160079478112793204432859674574603231582559733
 . . . . . . . . . . . . . . . . . . . . [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)
							1296ae0c88b2f587fc8093411ea4405172be3cb6
 . . . . . . . . . . . . . . . . [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 (72 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'oportunity.cz'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'opportunity.cz'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.oportunity.cz'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.opportunity.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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