artedu.cz
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 04:df:04:97:55:29:28:30:ba:13:93:f5:74:2f:dc:4e:8a:cc 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:df:04:97:55:29:28:30:ba:13:93:f5:74:2f:dc:4e:8a:ccSerial Number (int): 424338214226484651642321993488999100877516
Serial Number lenght: 139 bits, 18 octets
SubjectKeyId: c0:b2:c7:55:34:06:e7:0a:97:c6:d6:2e:fd:e4:92:3e:60:28:f4:17
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): 8b:c1:1e:1b:3e:7e:23:ac:3d:27:25:21:aa:2b:7d:ab:a8:83:97:a7
Fingerprint (sha256): aa:72:f4:b0:46:fa:e6:b9:96:e8:c3:e8:f3:7b:d8:2d:b4:eb:45:75:d2:7f:af:c8:f2:d1:2d:23:ee:2d:a7:de
Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/
Revocation information
OCSP Server: http://ocsp.int-x3.letsencrypt.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----- MIIGWjCCBUKgAwIBAgISBN8El1UpKDC6E5P1dC/cTorMMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xOTExMTMyMDEwMjBaFw0y MDAyMTEyMDEwMjBaMBQxEjAQBgNVBAMTCWFydGVkdS5jejCCAiIwDQYJKoZIhvcN AQEBBQADggIPADCCAgoCggIBAL302F1cppKuBZ6cMujMvNh9etopcLwiHP227d9D LNHpyM8kl6POJvrIe4DDvAi2G/55jyYpJKyeqFMnuW5iOpptIbowf8YAA5zouUoU aBISyKMZdoBFYY6e5LC2fZhnZ+OLT8fzTe4LqpHBleA9cXzX7EBllFn10BMiNhK6 pDe6KbBfijN7hKwMNfsyMAlppvSL/bokON/sTcQDPUqvwTJ6pBIbBTNS3R5kpyKW QNKQ7dr1vv9tTzx9p9KlR/YF+9bOKP3EpvyU0qBpWUg+F0A7MUQAxwKpQfpRZAma Sju2ofmKM9zKFinLGmxHIjqIXWllhz0VmgXiDZWrqv1m+foTk7zV+vKLuVWQjFnp dqKbSJabJcgpiqV2DtCFfL895MHPPjavOS5Ju2VFdBhu6zZSOUJJQnrRfLxujrcC t0qdqaiG0F1Ehy6F68eicpw/Sc43lR3XQO5VRuzAzMuldGiOFaqdN5dgIcevA9HQ +20jdNqytyTMd6/DDIO5emhf2VL+xb2482TfowlzmD4tojTkFfQ4aoBel3y2R/wg SsaoAKNM9l9dgBHYp0cMnaAmeAAkj8PCcuh4rqkeCfvNejIjJjXxxPWBf64ouk3M kftIK1ITmrw92Dw1J4XZZd8pxU3jFBvHZFDrZbYm2s/xWFX3xc4J2zUN7L+n8Mdx Yp+/AgMBAAGjggJuMIICajAOBgNVHQ8BAf8EBAMCBaAwHQYDVR0lBBYwFAYIKwYB BQUHAwEGCCsGAQUFBwMCMAwGA1UdEwEB/wQCMAAwHQYDVR0OBBYEFMCyx1U0BucK l8bWLv3kkj5gKPQXMB8GA1UdIwQYMBaAFKhKamMEfd265tE5t6ZFZe/zqOyhMG8G CCsGAQUFBwEBBGMwYTAuBggrBgEFBQcwAYYiaHR0cDovL29jc3AuaW50LXgzLmxl dHNlbmNyeXB0Lm9yZzAvBggrBgEFBQcwAoYjaHR0cDovL2NlcnQuaW50LXgzLmxl dHNlbmNyeXB0Lm9yZy8wIwYDVR0RBBwwGoIJYXJ0ZWR1LmN6gg13d3cuYXJ0ZWR1 LmN6MEwGA1UdIARFMEMwCAYGZ4EMAQIBMDcGCysGAQQBgt8TAQEBMCgwJgYIKwYB BQUHAgEWGmh0dHA6Ly9jcHMubGV0c2VuY3J5cHQub3JnMIIBBQYKKwYBBAHWeQIE AgSB9gSB8wDxAHcAsh4FzIuizYogTodm+Su5iiUgZ2va+nDnsklTLe+LkF4AAAFu ZppWWwAABAMASDBGAiEA0ky/DNEGffWgy43KGzT/wmQUUuhrytpc0V2DnFEUDEYC IQDoSZuSwK79smauwTQAmvl2LBI8XaJIQEr/+fFYLRZ7DwB2APCVpFnyANGCQBAt L5OIjq1L/h1H45nh0DSmsKiqjrJzAAABbmaaVt4AAAQDAEcwRQIgNw97oGjkGmyR l2SH7Ol+/fSmlmNa0C8qWMan8981+dsCIQDsuGOv3g4behipRPFrzexzhwPvVkVZ aqba9GJ5tasLzTANBgkqhkiG9w0BAQsFAAOCAQEAfzhPtIqIC/7I9bM67NwpLGYK AOIpBJKufAZHlcjo+icLchhdHYHuXJ+VC4Rb6S+bWRZQmovjAQSPoHnQHkw4Jqfb PF7ogMF9oxiEMlrqmM4AxBXqmxF3U8yKe7HdScLm2T5zvkbpv8VJxpPVvjw3e+el w+XCefYI4qdn/bLTpf8R4l406XbILtkIha4DzjuyatJT+IPLLE7KaI8uBJmYZCvo FKSGuJKeK74LP/nwQRKIcph8Q4EdIcPl+vjMoHFvRg3rMIpJ3AmMff99BW7n8d2P Jdmt2DqX17I0U4lzI1GJ78VpgYmlNLko1X0di6aEq1nxhDUDciVDAb8LTeFC0g== -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAvfTYXVymkq4Fnpwy6My8 2H162ilwvCIc/bbt30Ms0enIzySXo84m+sh7gMO8CLYb/nmPJikkrJ6oUye5bmI6 mm0hujB/xgADnOi5ShRoEhLIoxl2gEVhjp7ksLZ9mGdn44tPx/NN7guqkcGV4D1x fNfsQGWUWfXQEyI2ErqkN7opsF+KM3uErAw1+zIwCWmm9Iv9uiQ43+xNxAM9Sq/B MnqkEhsFM1LdHmSnIpZA0pDt2vW+/21PPH2n0qVH9gX71s4o/cSm/JTSoGlZSD4X QDsxRADHAqlB+lFkCZpKO7ah+Yoz3MoWKcsabEciOohdaWWHPRWaBeINlauq/Wb5 +hOTvNX68ou5VZCMWel2optIlpslyCmKpXYO0IV8vz3kwc8+Nq85Lkm7ZUV0GG7r NlI5QklCetF8vG6OtwK3Sp2pqIbQXUSHLoXrx6JynD9JzjeVHddA7lVG7MDMy6V0 aI4Vqp03l2Ahx68D0dD7bSN02rK3JMx3r8MMg7l6aF/ZUv7FvbjzZN+jCXOYPi2i NOQV9DhqgF6XfLZH/CBKxqgAo0z2X12AEdinRwydoCZ4ACSPw8Jy6HiuqR4J+816 MiMmNfHE9YF/rii6TcyR+0grUhOavD3YPDUnhdll3ynFTeMUG8dkUOtltibaz/FY VffFzgnbNQ3sv6fwx3Fin78CAwEAAQ== -----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 424338214226484651642321993488999100877516 . . . . . . . . [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 2019-11-13 20:10:20 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-02-11 20:10:20 +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 774954608403064167307147436138484435999336773281127961440024760775724804678749448462142490547344903357574844178142206162909205899896028507651300107619535009279653951860883776376728097322949442575028049599117109380424964469823626889586771308248160664839144551750885888012153707184566090550181746419482205493640881324328841224395033639906406701821327823232742996799477114320804996329643634644646800725915131847495808183945699870787185021663381945152958056009784322596072054865794840149678521544467567284047468368385568812977805095497508758984333712712524833273139686944754131539726637026391084844659388518822891774377451121922300383418962865375562162599506888279263172200469642013495030608179689623118470158409635798267219969063124355465760228280986279039629009985766221936027659447588554527911498287115174576304320649400768358743104102822154066390529068609977212445986109347851651623611756244309826459613340157399380394455418721795525701293020048116524937588302600138291628784205753290768772574386306826554537878456457878891572276412830238157786739689634425802336327703657848199247614903010243333183067103451067614431805519091592569738804145738616309880686914265334932968226189272854416335977999086335479200896488360173537462839320511 . . . . . . . . . . . . . . . . . . . . [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) c0b2c7553406e70a97c6d62efde4923e6028f417 . . . . . . . . . . . . . . . . [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 (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) 00f1007700b21e05cc8ba2cd8a204e8766f92bb98a2520676bdafa70e7b249532def8b905e0000016e669a565b0000040300483046022100d24cbf0cd1067df5a0cb8dca1b34ffc2641452e86bcada5cd15d839c51140c46022100e8499b92c0aefdb266aec134009af9762c123c5da248404afff9f1582d167b0f007600f095a459f200d18240102d2f93888ead4bfe1d47e399e1d034a6b0a8aa8eb2730000016e669a56de00000403004730450220370f7ba068e41a6c91976487ece97efdf4a696635ad02f2a58c6a7f3df35f9db022100ecb863afde0e1b7a18a944f16bcdec738703ef5645596aa6daf46279b5ab0bcd . . . . [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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