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:e0:70:15:86:47Serial 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.orgCheck 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
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----- MIIGKDCCBRCgAwIBAgISA2T39Bcr5e/RY6c8c+BwFYZHMA0GCSqGSIb3DQEBCwUA MDIxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MQswCQYDVQQD EwJSMzAeFw0yMjEyMzAxOTIyMDNaFw0yMzAzMzAxOTIyMDJaMBQxEjAQBgNVBAMT CWFydGVkdS5jejCCAiIwDQYJKoZIhvcNAQEBBQADggIPADCCAgoCggIBAKLi1/jX g0EZ9uKKWrpYYducrQ76F8tVXoHtTeT1hT5mLmvJdk55mlperVoF8F7kCeJM+8j2 ygr+w30y+hatkav7OCLna2fScmTUnJcGfXWFZh2F1cx9t1Yk5cWV+zW7dcgrpBxC z+krv6ontoJAYWIu8J0HQHD48WpQzC11JuDgCBmxjTuW4hGSlksnEvxkrkI4HVHq 4djEJdAsb1BuDVZ488oUPHDG+gbYbTbXezLcPi994b4YptYmp+FLuwbQjYxcX0nl 9PcTN2HnmTNlXhwR769kskNwRuTfnMV7TXRI6jOlC5SIcw9Ho/Onkwa1m40qkXWL St1smsxnBCtCas94S0Cn57oD3gWBW1RLWHKJjzPWaw8aV77z2+HiBJ77/0So1r1R XJGnzvSZZ6A4lWIR9t3Ckmmd3wxgvy1Bwt0SYNFAfY2UDFMlc/9fCJ2MgQESUPYL 3iZQbXeGZxKZCF3PiYvW1zs/uv1wqlIQYzJurtQkvtdHN981HazEWHgTT73KgSJT T8CBRcAPmIHx1u8uPqvuj31N+8W8bOHm4CYz+H9p5dWCtjOPJDb6NKOqxcO4bctR F2uWkIhk48kH8C6Plnm4thwfjjwI8zK0ihQnsoTuo1k1pQmCO7Fa6Zx72lzOqnTO Ymp/Ik4gbmLT4s79E55WiuZlJcNeHyccRsC5AgMBAAGjggJUMIICUDAOBgNVHQ8B Af8EBAMCBaAwHQYDVR0lBBYwFAYIKwYBBQUHAwEGCCsGAQUFBwMCMAwGA1UdEwEB /wQCMAAwHQYDVR0OBBYEFO4eNwaSnMkMIawpLMYENGLSFZsUMB8GA1UdIwQYMBaA FBQusxe3WFbLrlAJQOYfr52LFMLGMFUGCCsGAQUFBwEBBEkwRzAhBggrBgEFBQcw AYYVaHR0cDovL3IzLm8ubGVuY3Iub3JnMCIGCCsGAQUFBzAChhZodHRwOi8vcjMu aS5sZW5jci5vcmcvMCMGA1UdEQQcMBqCCWFydGVkdS5jeoINd3d3LmFydGVkdS5j ejBMBgNVHSAERTBDMAgGBmeBDAECATA3BgsrBgEEAYLfEwEBATAoMCYGCCsGAQUF BwIBFhpodHRwOi8vY3BzLmxldHNlbmNyeXB0Lm9yZzCCAQUGCisGAQQB1nkCBAIE gfYEgfMA8QB2AOg+0No+9QY1MudXKLyJa8kD08vREWvs62nhd31tBr1uAAABhWSy 4k8AAAQDAEcwRQIhAJ4ljAkUeaZ0U3yvVUSXLv8ebspd4dfZXfIQaPsupEtoAiBI 8ZIgFyV7/HNcPHu7pWAKzbi/4gyN4xENDPE84TfOJwB3AHoyjFTYty22IOo44FIe 6YQWcDIThU070ivBOlejUutSAAABhWSy5E8AAAQDAEgwRgIhAKZn4gxytRYYcvZ7 lhLm9LEgEp9aXbzTypRD/fvTtgR4AiEAnG1CV5pBeYEDmRFbmsg5agLr2TeU4TPc qLQ8QZCVTggwDQYJKoZIhvcNAQELBQADggEBAA633q4tnw3GVks1ZTuGpZD81tp3 +jfcYaxmlX4KwMVBQBN94MTiv3iGLpos7J5XsbJ8/aPxdZizRCBkKGee4+scoTpa CsmkQKTigwLJ68kQX2jkhmijXjJlHBEVP87ooa3jtFMFdQSSiEohneTAcdR1EhhO 97CsfIpTgFIGEfqxxJI/hxP6GIrlT7QAC1YGSQshAJGPWpZlw7LSkhdBFVzPXeT2 i8iaFPRV/45DOBnEeYAVUkTKsC+zL5mIan8hw0b3jezw1nkpeT5eg3Qry2IGiUGW g2A+0L0QELz/WJ9ptV6yjf2uhE5FZmJvY89udrtl9zZu1Y/YmqgLpQlQ2Jo= -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAouLX+NeDQRn24opaulhh 25ytDvoXy1Vege1N5PWFPmYua8l2TnmaWl6tWgXwXuQJ4kz7yPbKCv7DfTL6Fq2R q/s4IudrZ9JyZNSclwZ9dYVmHYXVzH23ViTlxZX7Nbt1yCukHELP6Su/qie2gkBh Yi7wnQdAcPjxalDMLXUm4OAIGbGNO5biEZKWSycS/GSuQjgdUerh2MQl0CxvUG4N VnjzyhQ8cMb6BthtNtd7Mtw+L33hvhim1ian4Uu7BtCNjFxfSeX09xM3YeeZM2Ve HBHvr2SyQ3BG5N+cxXtNdEjqM6ULlIhzD0ej86eTBrWbjSqRdYtK3WyazGcEK0Jq z3hLQKfnugPeBYFbVEtYcomPM9ZrDxpXvvPb4eIEnvv/RKjWvVFckafO9JlnoDiV YhH23cKSaZ3fDGC/LUHC3RJg0UB9jZQMUyVz/18InYyBARJQ9gveJlBtd4ZnEpkI Xc+Ji9bXOz+6/XCqUhBjMm6u1CS+10c33zUdrMRYeBNPvcqBIlNPwIFFwA+YgfHW 7y4+q+6PfU37xbxs4ebgJjP4f2nl1YK2M48kNvo0o6rFw7hty1EXa5aQiGTjyQfw Lo+Webi2HB+OPAjzMrSKFCeyhO6jWTWlCYI7sVrpnHvaXM6qdM5ian8iTiBuYtPi zv0TnlaK5mUlw14fJxxGwLkCAwEAAQ== -----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) 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