artedu.cz

Issued by R3

About this certificate

This digital certificate with serial number 04:ce:f7:73:ef:03:bd:5a:43:da:ce:13:be:31:7d:b1:2d:07 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=artedu.cz

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 04:ce:f7:73:ef:03:bd:5a:43:da:ce:13:be:31:7d:b1:2d:07
Serial Number (int): 418876232589644097336642106344681455561991
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: b3:bf:76:e2:47:84:80:95:b3:11:82:77:6a:11:31:2d:2d:f7:0e:aa
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): f9:17:0a:53:e7:20:6e:10:b9:ea:0b:6a:d9:57:47:7f:5e:2b:f5:11
Fingerprint (sha256): f5:ec:52:ca:8e:c8:9a:37:d9:9b:1f:e9:25:86:9e:00:50:40:59:9b:62:c1:5b:96:1e:34:f5:61:bf:58:68:7a

Issuing Certificate URL: http://r3.i.lencr.org/

Revocation information

OCSP Server: http://r3.o.lencr.org

Check the revocation status for certificate artedu.cz

2

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for artedu.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

9 extensions
No unhandled critical extensions

CA Certificate

This is not a CA certificate

Subject Alternative Names

artedu.cz
www.artedu.cz

Other certificates including the domain name artedu.cz

(limited to 100 certificates)
www.artedu.cz
www.artedu.cz
artedu.cz
artedu.cz
artedu.cz
www.artedu.cz
artedu.cz
www.artedu.cz
www.artedu.cz
www.artedu.cz
www.artedu.cz
www.artedu.cz
www.artedu.cz
artedu.cz
www.artedu.cz
www.artedu.cz
artedu.cz
artedu.cz
artedu.cz
www.artedu.cz
www.artedu.cz
artedu.cz
artedu.cz
artedu.cz

Certificate

The complete raw certificate details for artedu.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 418876232589644097336642106344681455561991
 . . . . . . . . [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 'R3'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2023-08-22 20:27:39 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2023-11-20 20:27:38 +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 'artedu.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 692053633171153186802508905311248065766848286569138605576670937093007373267210922095578629321095025671251702535655328929328501634696250392239647019438638310761770100663301061063032596202844502036568899826540373016764727123577683910938976471928696476601593786501075669905003676243078249686247667713096540505333840702076564411103038617429963969125272732411784829130699822965993614043083978339752485497614582999025277399668305515018080311075310255833497442015396887532883321656653238803420203214258708385813855847763888955345803696580705074876830440504955803242256794008195959052152585325307408865005514998523992769566872237301704930928018325276841687939222897000340306992706964586340201424297881479018526076036094215871403524331631888199987225169201331223399009872087881288402404170035377961485838161355972277387900600609206364088702150276992953899527952578096992486618227247614943835445177123240645965858093829255060658889831698539607266713921326549211864914610280068308433768825534113867751015904213863815619039135363577446516904233839617512477121855062050965222726558439702570573763143305135120837781761811068136573055000207783435277367701619949698443605632163311029035915631285262019449148194850958433762771211972682869421700894663
 . . . . . . . . . . . . . . . . . . . . [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)
							b3bf76e247848095b31182776a11312d2df70eaa
 . . . . . . . . . . . . . . . . [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 142eb317b75856cbae500940e61faf9d8b14c2c6
 . . . . . . . . . . . . . . . . [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 (73 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://r3.o.lencr.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://r3.i.lencr.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 'artedu.cz'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.artedu.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 (12 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 1.3.6.1.4.1.11129.2.4.2
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (245 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (242 bytes)
							00f0007600b73efb24df9c4dba75f239c5ba58f46c5dfc42cf7a9f35c49e1d098125edb4990000018a1f2569c70000040300473045022100f94f291a08e34f4f3de15434e928e2cfe38cb7011e71444f7109907d54d98a5002200fcd93cc836450e43a55695fe008abca43f626d1dd391af44133d42501875d960076007a328c54d8b72db620ea38e0521ee98416703213854d3bd22bc13a57a352eb520000018a1f2569f000000403004730450220012a286499b3229c25a728620e0cd415f52006c6b7a8ec015efb490401ce7da2022100b00843fbebfba16919985722e4a8ee23b50c78bd879b4ed0ad6fff0d338f3edf
 . . . . [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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