public.nic.cz
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:f6:6e:dc:a4:93:64:cd:d9:6d:62:ce:10:cc:31:75:3f:c2 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=public.nic.cz
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 03:f6:6e:dc:a4:93:64:cd:d9:6d:62:ce:10:cc:31:75:3f:c2Serial Number (int): 345193680780669732605976851614367158190018
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: 43:c1:bb:7f:ff:b3:9f:02:eb:8a:a8:da:bc:e7:6a:4e:34:72:a0:a9
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): 47:2e:d2:df:6a:54:d9:e6:fa:44:14:51:a4:36:52:df:74:51:c1:2d
Fingerprint (sha256): 02:bb:47:00:c3:1c:68:5f:17:d4:48:3b:30:b2:15:de:fe:0d:c1:2b:2a:d2:d1:6e:9e:af:c3:a9:4b:90:50:2f
Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/
Revocation information
OCSP Server: http://ocsp.int-x3.letsencrypt.orgCheck the revocation status for certificate public.nic.cz
1
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for public.nic.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
public.nic.cz
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Certificate
The complete raw certificate details for public.nic.cz in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIGUzCCBTugAwIBAgISA/Zu3KSTZM3ZbWLOEMwxdT/CMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xOTA0MjkwNzAwMThaFw0x OTA3MjgwNzAwMThaMBgxFjAUBgNVBAMTDXB1YmxpYy5uaWMuY3owggIiMA0GCSqG SIb3DQEBAQUAA4ICDwAwggIKAoICAQDkkgyvocCZxdonrvFn0H9TJYGpod1DlCts bUVMj5qCDr3xrMVy87qzYsCKpQvmC6g45IPFSi8TV2S6Iq1v2jhacCRpSvsXGFlA 2l100oA7DFfVzw7/J+Q656kT+C9sSkthfzOc1TTAQ3hQuhWIYKqzDbjzkfG6t3mo kB/irZp8zw+NPmDBrHGazJQGT6oWHPAbiKsPbA4UJyu0A7a0ttb4g4QjVSZld9vZ rXBctq6guxrMBJNHOQ4OBO4z95vifR2fAEBh8JsOdVa5igzedFAjTYVsBkolwd9v 3STCCPgLNCe/LMJrCW1JJie75GXtyU64PWIWL/UX7cjVZLiiuIuz7wSActL0GXQp PlZaCDEUZEeVjqfpoATm8Q8GpbQ9UbVuJODnJU5OFkAxWGoBqdM2nEjBdXtSOfmI 32DB8KuFCn67m4YelFnsGCPLtgfsBY7Ec1XxNs3MsdYVTCJITc2My0tgCd2h7iM5 9rz1d0WnjHFMPQeyYzCe1cc0yqMpGrquROzuqdi++kSYunSEG4XMqxXldcViKSIN d1zhRLAigDQp1AZ+Ym4gyN4vzG0aCFfxi5xFRv3M4vjXXximTgENvk/QB5r3jBpE BMzpHPUulQ7hvrjSxiSZfQQKLDyqNMAXbQC83ZL2s8epT8XFkYp0nMGx8c7oxnCS zF3evaA8vQIDAQABo4ICYzCCAl8wDgYDVR0PAQH/BAQDAgWgMB0GA1UdJQQWMBQG CCsGAQUFBwMBBggrBgEFBQcDAjAMBgNVHRMBAf8EAjAAMB0GA1UdDgQWBBRDwbt/ /7OfAuuKqNq852pONHKgqTAfBgNVHSMEGDAWgBSoSmpjBH3duubRObemRWXv86js oTBvBggrBgEFBQcBAQRjMGEwLgYIKwYBBQUHMAGGImh0dHA6Ly9vY3NwLmludC14 My5sZXRzZW5jcnlwdC5vcmcwLwYIKwYBBQUHMAKGI2h0dHA6Ly9jZXJ0LmludC14 My5sZXRzZW5jcnlwdC5vcmcvMBgGA1UdEQQRMA+CDXB1YmxpYy5uaWMuY3owTAYD VR0gBEUwQzAIBgZngQwBAgEwNwYLKwYBBAGC3xMBAQEwKDAmBggrBgEFBQcCARYa aHR0cDovL2Nwcy5sZXRzZW5jcnlwdC5vcmcwggEFBgorBgEEAdZ5AgQCBIH2BIHz APEAdgDiaUuuJujpQAnohhu2O4PUPuf+dIj7pI8okwGd3fHb/gAAAWpoG9/2AAAE AwBHMEUCIQCceHpOU1AKnlfQu96xTQb5aARbLB8Ll5ZNfFwiYllmhwIgMlgYkpFW UfqT/IttHGInK6AOwQou1PGy5MYt94exjmQAdwBj8tvN6DvMLM8LcoQnV2szpI1h d4+9daY4scdoVEvYjQAAAWpoG9+/AAAEAwBIMEYCIQDJJkFPZFUnXZ2yJWGkKG9h iqHj9/oLOeAtd3keyMdp4AIhALUUk1sbxXhoHlahyRq69XohjdiPD6H15HdqtegS W2kIMA0GCSqGSIb3DQEBCwUAA4IBAQAGDwhjlLIJPGsm+C9Sd2o1J+EJqQWE6z94 A9RaNjZpLz3Nz56JEVczRnpC3Sgkvfd6Dl6npM5MneHjFKBGwcZI8XI/mboSjHL6 vnHlTNGSKmzv8t3I/PhznUG2CXQndyMPYZikZrd28dBPXqfY7d+uzeQ/1Sfa8Qn5 rgZCCj4tcw6pgILSBbT3OY0Lbhmd5SG+HCYygqFqPChLPTjvfx69rDJjG1p3qLMc mZPQh8M5yzbIGiX/ZdV/Ed0pMsN2cwgNaXQ3kAJmbmEZU90sijqEvYFbEXD+s/qm yVfmoOLXcRar7pJxXpkGeeIXEhoKZw/nSVOGfqzDnDMEe+wfuCB8 -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEA5JIMr6HAmcXaJ67xZ9B/ UyWBqaHdQ5QrbG1FTI+agg698azFcvO6s2LAiqUL5guoOOSDxUovE1dkuiKtb9o4 WnAkaUr7FxhZQNpddNKAOwxX1c8O/yfkOuepE/gvbEpLYX8znNU0wEN4ULoViGCq sw2485Hxurd5qJAf4q2afM8PjT5gwaxxmsyUBk+qFhzwG4irD2wOFCcrtAO2tLbW +IOEI1UmZXfb2a1wXLauoLsazASTRzkODgTuM/eb4n0dnwBAYfCbDnVWuYoM3nRQ I02FbAZKJcHfb90kwgj4CzQnvyzCawltSSYnu+Rl7clOuD1iFi/1F+3I1WS4oriL s+8EgHLS9Bl0KT5WWggxFGRHlY6n6aAE5vEPBqW0PVG1biTg5yVOThZAMVhqAanT NpxIwXV7Ujn5iN9gwfCrhQp+u5uGHpRZ7Bgjy7YH7AWOxHNV8TbNzLHWFUwiSE3N jMtLYAndoe4jOfa89XdFp4xxTD0HsmMwntXHNMqjKRq6rkTs7qnYvvpEmLp0hBuF zKsV5XXFYikiDXdc4USwIoA0KdQGfmJuIMjeL8xtGghX8YucRUb9zOL4118Ypk4B Db5P0Aea94waRATM6Rz1LpUO4b640sYkmX0ECiw8qjTAF20AvN2S9rPHqU/FxZGK dJzBsfHO6MZwksxd3r2gPL0CAwEAAQ== -----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 345193680780669732605976851614367158190018 . . . . . . . . [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 2019-04-29 07:00:18 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-07-28 07:00:18 +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 'public.nic.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 932486309228917876888894513941593535066382376792144800465004556810533807655341141867710932273592924636280945276506852762375776186039610485003393230573406293632537249061162324244901984712418197141983341068835733248087452347268811261667366895176384813445646965608083715100449378011876048561750305164458076576368274320458035823933966719583520257636410230188924047008079430587533626649230555014402554532330073851306943081036596299443060192026459633106420995410696483000516410530107674994885330984496111379007880234290696288449801197763649565411349282663228746727537184833148892795909062122173487853438943323191108006322193407275736603748740956519467989817755855421123850552283191126572621210773429312457950338920919244467083575050236174917222269105614754583542724822004110499776962328140204832216744624390703787136065230227937035261403573611518656012279125792075328145966457302913217282209610776080860029959353275953815505503443085137619630911848308120691136668565612713413572356656000388220483079125618038373394677602246750689943378528128627943127999119702789669826002886748826108671991106747320976119291469591376440025158871948644080550514626315307788117434055649180108482772816023805529774656098453624299085533523547196008289775140029 . . . . . . . . . . . . . . . . . . . . [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) 43c1bb7fffb39f02eb8aa8dabce76a4e3472a0a9 . . . . . . . . . . . . . . . . [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 'public.nic.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) 00f1007600e2694bae26e8e94009e8861bb63b83d43ee7fe7488fba48f2893019dddf1dbfe0000016a681bdff600000403004730450221009c787a4e53500a9e57d0bbdeb14d06f968045b2c1f0b97964d7c5c2262596687022032581892915651fa93fc8b6d1c62272ba00ec10a2ed4f1b2e4c62df787b18e6400770063f2dbcde83bcc2ccf0b728427576b33a48d61778fbd75a638b1c768544bd88d0000016a681bdfbf0000040300483046022100c926414f6455275d9db22561a4286f618aa1e3f7fa0b39e02d77791ec8c769e0022100b514935b1bc578681e56a1c91abaf57a218dd88f0fa1f5e4776ab5e8125b6908 . . . . [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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