artedu.cz

Issued by R3

About this certificate

This digital certificate with serial number 03:64:f7:f4:17:2b:e5:ef:d1:63:a7:3c:73:e0:70:15:86:47 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): 03:64:f7:f4:17:2b:e5:ef:d1:63:a7:3c:73:e0:70:15:86:47
Serial Number (int): 295694681192740336866192396437352103642695
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: ee:1e:37:06:92:9c:c9:0c:21:ac:29:2c:c6:04:34:62:d2:15:9b:14
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 99:66:e3:1c:b9:20:54:b0:a7:8f:2f:87:9c:b5:2e:4a:aa:5c:de:c2
Fingerprint (sha256): 90:96:c1:81:9b:61:b2:f9:fc:06:f1:2f:a9:d2:9f:ba:ca:7b:13:9b:57:a1:7e:ff:f7:78:70:99:bb:bd:04:5d

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)

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 295694681192740336866192396437352103642695
 . . . . . . . . [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 2022-12-30 19:22:03 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2023-03-30 19:22:02 +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 664517344149951279844331148230405496473548134402196727006174580126992902380418508372992340358684531424930857741292140592746191912713452565222846759198012039170343539141394746480009069457128407564756236048857859721005895025477672773918567580469699030490003733047579520786604451105653439629142448626406410148387429593576208985111489572169019115381852634835436899895571118775533083970029014894845525242710220276446824408275792197269504206930922185939971771495262247047715829561707877097277622516848473945541629391363556015006465570402702073977207414394061542977915732490421110274839093053459308143744299122534896340996712015772957489631503837816347422156634429847911175121011827594392439179030829593337741288167451096453932109173428866218247957197244654083724858658788555652609432334773980193192579118631317303439453470324374376681607213862436013400223889382078759237974197132857303602239010577847711616628135221799612323719136605393372530793796951399446602139131649718678611282752114144755349668141448407189319508803857228764069716083946782485832109832307634863822321240485648995066507078658692134676768393972664204000588177218927406490119379289545718398287940806469680415643682206257745658852770555861399298009421409264554648497733817
 . . . . . . . . . . . . . . . . . . . . [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)
							ee1e3706929cc90c21ac292cc6043462d2159b14
 . . . . . . . . . . . . . . . . [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 (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 (246 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (243 bytes)
							00f1007600e83ed0da3ef5063532e75728bc896bc903d3cbd1116beceb69e1777d6d06bd6e0000018564b2e24f00000403004730450221009e258c091479a674537caf5544972eff1e6eca5de1d7d95df21068fb2ea44b68022048f1922017257bfc735c3c7bbba5600acdb8bfe20c8de3110d0cf13ce137ce270077007a328c54d8b72db620ea38e0521ee98416703213854d3bd22bc13a57a352eb520000018564b2e44f0000040300483046022100a667e20c72b5161872f67b9612e6f4b120129f5a5dbcd3ca9443fdfbd3b604780221009c6d42579a4179810399115b9ac8396a02ebd93794e133dca8b43c4190954e08
 . . . . [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)
		000eb7deae2d9f0dc6564b35653b86a590fcd6da77fa37dc61ac66957e0ac0c54140137de0c4e2bf78862e9a2cec9e57b1b27cfda3f17598b344206428679ee3eb1ca13a5a0ac9a440a4e28302c9ebc9105f68e48668a35e32651c11153fcee8a1ade3b45305750492884a219de4c071d47512184ef7b0ac7c8a5380520611fab1c4923f8713fa188ae54fb4000b5606490b2100918f5a9665c3b2d2921741155ccf5de4f68bc89a14f455ff8e433819c47980155244cab02fb32f99886a7f21c346f78decf0d67929793e5e83742bcb620689419683603ed0bd1010bcff589f69b55eb28dfdae844e4566626f63cf6e76bb65f7366ed58fd89aa80ba50950d89a