www.cernym.cz

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:6b:1f:ab:4d:16:94:6b:69:8e:67:82:21:8f:ae:68:28:dc was issued on by Let's Encrypt.

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.cernym.cz

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:6b:1f:ab:4d:16:94:6b:69:8e:67:82:21:8f:ae:68:28:dc
Serial Number (int): 297789166569987790069521351063640822261980
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 65:3d:e8:b4:43:2c:b2:59:fd:4b:f1:0a:4b:1c:67:dc:d3:d3:e4:c4
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 46:58:4d:b7:f8:56:d6:dc:72:7c:2e:4c:aa:ca:ea:7f:a3:96:a7:d1
Fingerprint (sha256): 84:b5:d1:71:ed:ed:f2:c1:8e:a4:61:36:42:22:8d:1f:5a:c9:d0:f3:e2:13:05:5b:e1:d0:49:8c:f8:42:41:48

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.cernym.cz

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for www.cernym.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

www.cernym.cz

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Certificate

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

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA8LEFTL9r4Y+iHBNqFMsq
BPq2ssijj4k3p3iR0qEA84JyPiBrIJ8BAquwSEjr6VCwBWMNHm4cVMoyznMbZtIJ
SMwm+bahodgVaBeTFuec11PaPS5zdqiKBcAiKV9D9fAChCQyTqrsKOUMfpTq7hZH
8PxEP/HG9vaZrsj0iAoqbAw/xDKajndMG2+H6BCNRf2+JEiOxVFi9I3Dtw39BFsh
Y+8Mb5E2qALvnlpGCLiSyLaZwfeh0pJjb0lO9Ktpz9OTbW/AaT7UxFBmZwk0ZPoJ
w2LQZUeNqrvEPnt2AUQJwf988KAYqe7Qnnskxvegt46siLsASAnYvZXrbc4F4SN4
xwIDAQAB
-----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 297789166569987790069521351063640822261980
 . . . . . . . . [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 2019-09-14 06:12:37 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-12-13 06:12:37 +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.cernym.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 30384485353595218410256705551872431338752349289416387067728287676591846517869870053498549735802742302488784019615601855637376388792608166965632284479604298742614497477221629784040022981827775047690421639514160015490879052859526347352759852449499074711238945211675012059328929869537779219678649144925504975364626654049315418571879980449235738617305947956200074505990785225425942893431215329263849485819056407622331692966303750059821156795344899610888104680026113015345089626301704309890050649014462292914078402711563264305542371569898677632031115095414588296044925411010796323388324821347194559698262883358389668378823
 . . . . . . . . . . . . . . . . . . . . [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)
							653de8b4432cb259fd4bf10a4b1c67dcd3d3e4c4
 . . . . . . . . . . . . . . . . [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 (17 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.cernym.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 (244 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (241 bytes)
							00ef007600e2694bae26e8e94009e8861bb63b83d43ee7fe7488fba48f2893019dddf1dbfe0000016d2e9dd0c200000403004730450220227062564d8bd49fa80d9a2cedf78165e9a3251c088054044ef6cfa11a503f92022100e32f39009c0c91dc43a7ab699b8e6f4ba41b4367611793ea0aebc2eeea2146b6007500293c519654c83965baaa50fc5807d4b76fbf587a2972dca4c30cf4e54547f4780000016d2e9dcecb00000403004630440220632347e657d166d48888bd2328549aa468ded3f673c8a1f0526e267ae9bbd7640220484c8608204b07d2036b382a36af60f6c6e000548203c9f566bd5558f300b4e0
 . . . . [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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