www.opportunity.cz

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:20:c6:ff:2f:f5:4b:e9:6b:72:ff:ab:e6:28:08:5a:2a:cf 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): 03:20:c6:ff:2f:f5:4b:e9:6b:72:ff:ab:e6:28:08:5a:2a:cf
Serial Number (int): 272490405688322755245070324307820401011407
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 23:85:f9:37:92:84:91:c0:9c:0d:be:2b:0c:0f:91:3b:4a:22:9b:b7
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 3c:07:aa:37:d7:12:98:25:e6:71:65:e3:dd:83:3f:a7:fc:49:ca:00
Fingerprint (sha256): 14:c8:cb:0a:8b:f1:92:27:a1:21:5c:82:29:13:2e:0b:af:73:93:df:99:72:5b:b7:19:9c:20:39:8c:2a:23:c1

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 272490405688322755245070324307820401011407
 . . . . . . . . [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 2017-11-29 06:20:56 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2018-02-27 06:20:56 +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 841325797368972736807520976237841545081349330174164009122262166485434883067002166305546804027355388462726539651081460912900450839647138688365864534730121169317912575274110045878664095385986820518267619560712354141073553241801898434187010889284486215600925952116653801117563003951138057566396184677564385610604248404656187579555936667194371967386553483196321065853373352169126575692613435336944092847993244752796357169598252388118095752868822881710520135396865181236998053561617181769676476163925696151799304885185182489141880369411996811790411659664290935267119674123042773320509713883869745348089722758936006898615839090482845146807165743189895769525080188896279870480703690359109079335463184879134120760060739445657239884593734698613894463754016827432947016273296862149813547167763617252266412831194969609923188103031249517349200346997215572601463259513146798254090553975194284782071186813568456449362929070385930484814904923391845542033184229413167490818431399228292490892561930136976236394939494306290788771730306937666676310661601971431201675622791995543968399569508642893557187713453043369169935960738470132935056756425199471469194500767728373106631364216856308338140179587694368010938383886861145471886739445458698035335669319
 . . . . . . . . . . . . . . . . . . . . [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)
							2385f937928491c09c0dbe2b0c0f913b4a229bb7
 . . . . . . . . . . . . . . . . [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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