istars.cz
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:80:62:01:18:03:84:d2:34:9c:6e:cf:5e:81:24:f3:fb:b6 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=istars.cz
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 03:80:62:01:18:03:84:d2:34:9c:6e:cf:5e:81:24:f3:fb:b6Serial Number (int): 305023270784101264672906003579274498669494
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: 96:c3:6d:b2:66:c8:1f:a2:06:f8:9b:13:25:ff:44:44:63:1e:45:07
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): 80:13:9f:74:37:08:22:1c:5a:1b:bb:7c:7c:7d:2d:5d:d9:14:2f:39
Fingerprint (sha256): 84:bf:a7:9d:6b:9c:5c:29:44:80:de:4c:18:e4:ef:b7:cc:f9:5b:8e:3b:78:3b:e9:8c:b0:bd:84:82:fb:4a:a2
Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/
Revocation information
OCSP Server: http://ocsp.int-x3.letsencrypt.orgCheck the revocation status for certificate istars.cz
2
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for istars.cz
Public Key Algorithm
RSA
Key Size
2048
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
*.istars.cz
istars.cz
istars.cz
Other certificates including the domain name istars.cz
(limited to 100 certificates)
Certificate
The complete raw certificate details for istars.cz in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIFVzCCBD+gAwIBAgISA4BiARgDhNI0nG7PXoEk8/u2MA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0yMDAxMjcxMjQ5NDVaFw0y MDA0MjYxMjQ5NDVaMBQxEjAQBgNVBAMTCWlzdGFycy5jejCCASIwDQYJKoZIhvcN AQEBBQADggEPADCCAQoCggEBAMrr/mA1HSnFPSFr9Dfwj9Yo8oDvg7roEsHzs6Ed z9P9kdkEDrwhFsRyeQzRlrqnYoa2jy1SIszBW2nGMKnzhqBcMGGpyNZ5yo9YXUP1 1UqHHhy4Ree2zvrk0C80tcv8CZaUZdAAQgzSAS0HTqTlQMsvcXzmUOtLBTw/z/+u sSsmsNEyCtRJxINCU5pI78rMLFXK9YiUA9rh70N0ktU7fzHBYvWiwcl1i3cX+wht HjS6cqPUGR6KaTKUBfVF0DJFBo3aCRRxqOWd+gw5fIG7bG0J7k5YIwv0FGTzVN9l NLVylDLhWZlYktEFkDOFo7RvfRlqHktN/MNLMBPFrpW1b7kCAwEAAaOCAmswggJn MA4GA1UdDwEB/wQEAwIFoDAdBgNVHSUEFjAUBggrBgEFBQcDAQYIKwYBBQUHAwIw DAYDVR0TAQH/BAIwADAdBgNVHQ4EFgQUlsNtsmbIH6IG+JsTJf9ERGMeRQcwHwYD VR0jBBgwFoAUqEpqYwR93brm0Tm3pkVl7/Oo7KEwbwYIKwYBBQUHAQEEYzBhMC4G CCsGAQUFBzABhiJodHRwOi8vb2NzcC5pbnQteDMubGV0c2VuY3J5cHQub3JnMC8G CCsGAQUFBzAChiNodHRwOi8vY2VydC5pbnQteDMubGV0c2VuY3J5cHQub3JnLzAh BgNVHREEGjAYggsqLmlzdGFycy5jeoIJaXN0YXJzLmN6MEwGA1UdIARFMEMwCAYG Z4EMAQIBMDcGCysGAQQBgt8TAQEBMCgwJgYIKwYBBQUHAgEWGmh0dHA6Ly9jcHMu bGV0c2VuY3J5cHQub3JnMIIBBAYKKwYBBAHWeQIEAgSB9QSB8gDwAHYAsh4FzIui zYogTodm+Su5iiUgZ2va+nDnsklTLe+LkF4AAAFv50PqtwAABAMARzBFAiEA3LMK kue0LLTwLAuPYLKuhyQl4XAt5TNmh/PkRBzmqWcCIGSqh6xtcTubXAT2Q6uOOwod QyGd0sSGEKv8CfWdy0VIAHYAb1N2rDHwMRnYmQCkURX/dxUcEdkCwQApBo2yCJo3 2RMAAAFv50PrWwAABAMARzBFAiAwz8VjhS7B7A0JAVDlV6tXOTGIVMq/a3Bg3jlw KyKrYAIhAOTY+CCuze1k7YXEMahe6WD6sKAydGqgC55I9DKECTzCMA0GCSqGSIb3 DQEBCwUAA4IBAQCVLEaJr4c7xzA8SebdO3cbZREq1gKSLXTaECJiADjd8PI/i1nB bsVEMLEeLv8C2dsnGJp8SZbW7iD9G230AP84cO6TEhwldGdBxRaQlMrwNV2CuoVS y52YaoYPgWnmvzUsM+zV4vO+XKpyDer3FBSc9qPis9f8wR5JiNwWxaPbQnvoxsM8 llwuEjHrD4sAd63y8hSxFhAipw25ELn4CAjo6kjqf5gSQpE1esW8E5WlbH8R1REH 9evzfm6CwGi4v97ptwhLRI2cOb+TCrjCWQ72X5zcT9YQwtW2zb5s3wW+wvJxe8UW rva3jsX0As5CvnKoqtFDt/ZnSxr0tnOF8xvR -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAyuv+YDUdKcU9IWv0N/CP 1ijygO+DuugSwfOzoR3P0/2R2QQOvCEWxHJ5DNGWuqdihraPLVIizMFbacYwqfOG oFwwYanI1nnKj1hdQ/XVSoceHLhF57bO+uTQLzS1y/wJlpRl0ABCDNIBLQdOpOVA yy9xfOZQ60sFPD/P/66xKyaw0TIK1EnEg0JTmkjvyswsVcr1iJQD2uHvQ3SS1Tt/ McFi9aLByXWLdxf7CG0eNLpyo9QZHoppMpQF9UXQMkUGjdoJFHGo5Z36DDl8gbts bQnuTlgjC/QUZPNU32U0tXKUMuFZmViS0QWQM4WjtG99GWoeS038w0swE8WulbVv uQIDAQAB -----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 305023270784101264672906003579274498669494 . . . . . . . . [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 2020-01-27 12:49:45 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-04-26 12:49:45 +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 'istars.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 (2160 bits) . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 25616510411949600018031945964569920232495274276876312423493709137082428833114211808540147226663891148358337905371211140143943763011398718111947921838820706323236872515002448478493430365861551213228754610787528612339584097517935743612792355457743500205122584916186086174291651002576536006716250211888535154704240502175060285302179357135805885948657331609423758772754249344632045745623733520492152361893593668351404459400183273422260511347002449965958213956011488638472924694841347745553539409562756466897887716449269448192907806006660499484840698590447915398311463420954787022197391809010277759996367697624921892286393 . . . . . . . . . . . . . . . . . . . . [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) 96c36db266c81fa206f89b1325ff4444631e4507 . . . . . . . . . . . . . . . . [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 (26 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String '*.istars.cz' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'istars.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 (245 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (242 bytes) 00f0007600b21e05cc8ba2cd8a204e8766f92bb98a2520676bdafa70e7b249532def8b905e0000016fe743eab70000040300473045022100dcb30a92e7b42cb4f02c0b8f60b2ae872425e1702de5336687f3e4441ce6a967022064aa87ac6d713b9b5c04f643ab8e3b0a1d43219dd2c48610abfc09f59dcb45480076006f5376ac31f03119d89900a45115ff77151c11d902c10029068db2089a37d9130000016fe743eb5b0000040300473045022030cfc563852ec1ec0d090150e557ab5739318854cabf6b7060de39702b22ab60022100e4d8f820aecded64ed85c431a85ee960fab0a032746aa00b9e48f43284093cc2 . . . . [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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