www.wk.cz
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:c4:ba:f7:9a:18:e6:31:f3:e7:9f:73:ba:cf:74:32:5f:a5 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=www.wk.cz
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 03:c4:ba:f7:9a:18:e6:31:f3:e7:9f:73:ba:cf:74:32:5f:a5Serial Number (int): 328280723741788528037608879533613246472101
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: c9:4a:06:7b:10:55:7b:1b:46:4f:94:97:29:41:8a:33:9f:4c:fa:b5
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): 5d:62:38:fe:04:47:d3:55:11:4f:08:c4:ed:3b:0c:03:90:c7:2d:7d
Fingerprint (sha256): 3e:fc:b4:34:18:3a:62:87:6e:d5:28:26:a3:6c:4a:cb:54:ce:0b:57:1a:ff:1b:4e:0f:91:8f:53:ed:06:54:f1
Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/
Revocation information
OCSP Server: http://ocsp.int-x3.letsencrypt.org/Check the revocation status for certificate www.wk.cz
2
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for www.wk.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
8 extensions
No
unhandled critical extensions
CA Certificate
This is not a CA certificate
Subject Alternative Names
wk.cz
www.wk.cz
www.wk.cz
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mail.wk.cz
Certificate
The complete raw certificate details for www.wk.cz in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIF/TCCBOWgAwIBAgISA8S695oY5jHz559zus90Ml+lMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xNjEyMTYyMDU0MDBaFw0x NzAzMTYyMDU0MDBaMBQxEjAQBgNVBAMTCXd3dy53ay5jejCCAiIwDQYJKoZIhvcN AQEBBQADggIPADCCAgoCggIBAKDiorCmXRCVeKCmriSgjopBxtaZq/FWrKu/QJp2 2lZ19BAdPbdJsmeUA/nuTfKD2wmrUpZI5DuUxCQGuOT1D29ya7rcyPfxhvZve5LP QskapX7G6urvRsQPmNf3DtUXfK/sT0VZXFHoy1qC4SiJTDFi320Og8a/WrFmcFae Ynt9tDyfeCU/DPbV0CejaDKFzUnBFRuiA+ddHSuETvpnZ7BtGZie8I8ZUfj0PnEl Y88VRuPdfuTUPyBzmrHy85VFRRlYCSVgbuiNw/8ToFV7rR+1EXbw3T1AdC01KT/X tqosqayu+zK+25zLuJ+uO7XFGDo3DWXILLtDPGXuupP5bmkKFCAcAl/DRAoX2PCL Oeps7B4KrzNmofF3yhIG9DxNvc/67nPV9WvbPHOzPqxeaUzEv0aQNSJOP8UXUynf fUzxoadFFxYPaiH25n3aiM64q7QNauxHYpyA8JX9p/gKCd6lthx2EGk41ppIVhah Rh0W7cq43xITTaUqn2VSmKM6Q2DHYyZaNV0MozvTKY0AzVaEQ5SF7fUs6GjOziei XRMp5syCd/ptcSPVFrERedswp3QrClx7Z8Df+SoqC3zbB7vleKGtirOM9f4DPlvd rV7mffPKdzbE+2fUSdONuB5HggJ5DjjFPo7RUAjsB28EsiaCQlAo/TLirKAscMN4 MXm7AgMBAAGjggIRMIICDTAOBgNVHQ8BAf8EBAMCBaAwHQYDVR0lBBYwFAYIKwYB BQUHAwEGCCsGAQUFBwMCMAwGA1UdEwEB/wQCMAAwHQYDVR0OBBYEFMlKBnsQVXsb Rk+UlylBijOfTPq1MB8GA1UdIwQYMBaAFKhKamMEfd265tE5t6ZFZe/zqOyhMHAG CCsGAQUFBwEBBGQwYjAvBggrBgEFBQcwAYYjaHR0cDovL29jc3AuaW50LXgzLmxl dHNlbmNyeXB0Lm9yZy8wLwYIKwYBBQUHMAKGI2h0dHA6Ly9jZXJ0LmludC14My5s ZXRzZW5jcnlwdC5vcmcvMBsGA1UdEQQUMBKCBXdrLmN6ggl3d3cud2suY3owgf4G A1UdIASB9jCB8zAIBgZngQwBAgEwgeYGCysGAQQBgt8TAQEBMIHWMCYGCCsGAQUF BwIBFhpodHRwOi8vY3BzLmxldHNlbmNyeXB0Lm9yZzCBqwYIKwYBBQUHAgIwgZ4M gZtUaGlzIENlcnRpZmljYXRlIG1heSBvbmx5IGJlIHJlbGllZCB1cG9uIGJ5IFJl bHlpbmcgUGFydGllcyBhbmQgb25seSBpbiBhY2NvcmRhbmNlIHdpdGggdGhlIENl cnRpZmljYXRlIFBvbGljeSBmb3VuZCBhdCBodHRwczovL2xldHNlbmNyeXB0Lm9y Zy9yZXBvc2l0b3J5LzANBgkqhkiG9w0BAQsFAAOCAQEAWZEkE7v7NoT5tSEBlVGE U43ca5E5Ty2DqqYuFoT/cGgn3E3QT+xo4An5jzKNx2gfq9gmVs5giLlwm1o69oQj WkcJIJsUq6f44/uzRi1LvCjjov70Opq25q86YC9TWkQDiFA5gZg2ez2zsHm/BJjX XNQdmayRA3Dz34v+aCCcgYSmZCUe42bn3aeHD94gUUYssF9ra5fcjIg/TBrJXI6F uG2DL8qbM7cnEB2El6mmCSMmj7d1Hx/SWAgTMoyTBI5OW0YQs6cVB35QyDEqT4cI U3P5LYGj0Xpmd4EXTbvegQj2zPDc/pYCyIJiIRVXCmCMo39gC7eW/euQy3KUfqbs HQ== -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAoOKisKZdEJV4oKauJKCO ikHG1pmr8Vasq79AmnbaVnX0EB09t0myZ5QD+e5N8oPbCatSlkjkO5TEJAa45PUP b3JrutzI9/GG9m97ks9CyRqlfsbq6u9GxA+Y1/cO1Rd8r+xPRVlcUejLWoLhKIlM MWLfbQ6Dxr9asWZwVp5ie320PJ94JT8M9tXQJ6NoMoXNScEVG6ID510dK4RO+mdn sG0ZmJ7wjxlR+PQ+cSVjzxVG491+5NQ/IHOasfLzlUVFGVgJJWBu6I3D/xOgVXut H7URdvDdPUB0LTUpP9e2qiyprK77Mr7bnMu4n647tcUYOjcNZcgsu0M8Ze66k/lu aQoUIBwCX8NEChfY8Is56mzsHgqvM2ah8XfKEgb0PE29z/ruc9X1a9s8c7M+rF5p TMS/RpA1Ik4/xRdTKd99TPGhp0UXFg9qIfbmfdqIzrirtA1q7EdinIDwlf2n+AoJ 3qW2HHYQaTjWmkhWFqFGHRbtyrjfEhNNpSqfZVKYozpDYMdjJlo1XQyjO9MpjQDN VoRDlIXt9SzoaM7OJ6JdEynmzIJ3+m1xI9UWsRF52zCndCsKXHtnwN/5KioLfNsH u+V4oa2Ks4z1/gM+W92tXuZ988p3NsT7Z9RJ0424HkeCAnkOOMU+jtFQCOwHbwSy JoJCUCj9MuKsoCxww3gxebsCAwEAAQ== -----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 328280723741788528037608879533613246472101 . . . . . . . . [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 2016-12-16 20:54:00 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2017-03-16 20:54:00 +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 'www.wk.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 656354739186593878570814088020411059881626532704621327238949946293597619654610146035698207670934633452901729622264538909371711858413708623191944626235184975236239509751219430774039903639411221670650404431429698903787923818573424536979614574092493277265326802654250916615244783951268386092291705618011226032323206501427538292510599131147422543917481665954936356132085546756210593731534457162023374186428302252892730262124821304652989425517059879124188340331898716244502522986403801918774308196554170651942822623531565799564506122139118532355157221721042515336584836041336599083198941873836765146589762574948808633607558766390139418835295791497174813338340058522701794070667505571587573580207367516383947404694315565845842135565962081766646939400268677861885386176383662214585539106007163285890512935897471511285269352893057046657605955155913164463622968728981791496950291747358441849316012643426109822983898603793931588704127612444626214408174308148675168033115373689975460149358770921707153809343783175431559703201197909264447552568559071393252984901352556910717670823120130191064087170479970176538845775538976788845440404855826264320392126893454501003820635444388838000487227286546331975556588243558906671385000010692520497636276667 . . . . . . . . . . . . . . . . . . . . [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) c94a067b10557b1b464f949729418a339f4cfab5 . . . . . . . . . . . . . . . . [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 (100 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 (20 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'wk.cz' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.wk.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 (246 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 1.3.6.1.5.5.7.2.2 (unotice) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:12|false] UTF8String 'This Certificate may only be relied upon by Relying Parties and only in accordance with the Certificate Policy found at https://letsencrypt.org/repository/' . . . . [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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