ctu.gov.cz

Issued by R3

About this certificate

This digital certificate with serial number 04:0c:11:54:1e:37:6b:b2:9e:4e:21:0a:0d:d1:6a:96:32:16 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:
  • DV certificate contains a subject common name, this is not recommended. If certificate policy 2.23.140.1.2.1 (CA/B BR domain validated) is included, only country and/or common name is allowed in SubjectDN. (BRs: 7.1.2.7.2)
  • Subscriber certificates use of Subject Key Identifier is NOT RECOMMENDED (BRs v2: 7.1.2.7.6)
  • Subscriber Certificate: commonName is NOT RECOMMENDED. (BRs: 7.1.2.7.1)

Certificate Subject

CN=ctu.gov.cz

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 04:0c:11:54:1e:37:6b:b2:9e:4e:21:0a:0d:d1:6a:96:32:16
Serial Number (int): 352555565771819876523672812255136787608086
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: 91:b4:9c:2f:38:54:44:f0:5d:7d:b8:8e:5d:e5:95:11:d1:24:b6:b7
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): df:be:58:ea:3c:a5:fc:27:9f:f9:0f:2a:8c:ad:60:60:78:85:42:89
Fingerprint (sha256): 00:3b:05:7c:8d:b4:97:b1:96:68:62:94:f7:55:71:42:88:98:9d:d7:a8:14:e8:8c:be:0f:a7:e8:ce:5a:b4:56

Issuing Certificate URL: http://r3.i.lencr.org/

Revocation information

OCSP Server: http://r3.o.lencr.org

Check the revocation status for certificate ctu.gov.cz

2

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for ctu.gov.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

ctu.gov.cz
www.ctu.gov.cz

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pruvodce.udh.gov.cz
cms.gov.cz
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data.mvcr.gov.cz
portal.gov.cz
smlouvy.gov.cz
rpp-aism-pub-test.egon.gov.cz
cert-externalauthapi.caais-test-int.gov.cz
irop.gov.cz
data.gov.cz
upv.gov.cz
frs.gov.cz
digitalnicesko.gov.cz
zakony.gov.cz
vzdelavani.gov.cz
data.mvcr.gov.cz
slovnik.gov.cz
voda.gov.cz
*.gov.cz
geoportal.gov.cz
xn--slovnk-7va.gov.cz
data.kraj-jihocesky.gov.cz
testrs.gov.cz
rpp-ais-test.egon.gov.cz
twist-gp.kraj-jihocesky.gov.cz
mids.gov.cz
zony.kraj-jihocesky.gov.cz
www.gov.cz
code.gov.cz
viap1p.ros-iais.egon.gov.cz
vea801.gov.cz
desu.gov.cz
viap1t.ros-iais.egon.gov.cz
biap1t.ros-iais.egon.gov.cz
opendata.gov.cz
ext-mattermost.nic.cz
ria.gov.cz
admin.gov.cz
rrtv.gov.cz
*.szpi.gov.cz
covid.gov.cz
www.gov.cz
vea801.gov.cz
zony.kraj-jihocesky.gov.cz
*.kraj-jihocesky.gov.cz
spektrum.ctu.gov.cz
vyzkum.gov.cz
razr-pub.egon.gov.cz
testrs.gov.cz
ra.gov.cz
mids.gov.cz
archi.gov.cz
zds.kraj-jihocesky.gov.cz
nap.gov.cz
rpp-opendata-test.egon.gov.cz
cms.gov.cz
opendata.gov.cz
rpp-aism.egon.gov.cz
museion.kraj-jihocesky.gov.cz
prod.frs.gov.cz
tsl.gov.cz
isnipi.gov.cz
testrs.gov.cz
vea801.gov.cz
rpp-ais.egon.gov.cz
www.snsu.cz
tsl.gov.cz
uohs.cz
registrace.udh.gov.cz
gov.cz
admin.pruvodcepripojenim.gov.cz
vyzkum.gov.cz
smlouvy.gov.cz
rpp-aism-pub.egon.gov.cz
brvpn.ros.egon.gov.cz
uzsvm.cz
scitani.gov.cz
eru.gov.cz
mids.gov.cz
obcan.portal.gov.cz
upv.gov.cz
voda.gov.cz
code.gov.cz
ares.gov.cz
chciidentitu.gov.cz
biap1t.ros-iais.egon.gov.cz
viap1p.ros-iais.egon.gov.cz
czechtourism.gov.cz
anonymizace.gov.cz
*.kraj-jihocesky.gov.cz
mk.gov.cz
isdv.upv.gov.cz

Certificate

The complete raw certificate details for ctu.gov.cz in PEM and ASN.1 format.

Certificate (PEM)

-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAlR5ZmptZE2tByxqrmNUN
5x4RnScSEnMaVoJW1QAM2fJ/VLb48QORZZmsa4Ca9ElfC3jVaLUZDBnnC1wuNKBu
PutmP+jSe3tqC5XtlJ1UEwjlyavgbNZe+rbFPyNW/b0Td8JKueImpigyteq4j4/J
sB2UJjn4pM2LMzb7tNUmCxBUHioLrOsabArsNkUb0vcrMJ7izN5LqAU/RH6+F8kP
g8JUmYVJJdPIVyBUWrwj6E/7cPncLLgOidO9SjyXThTYfiq7/rdxbwGrPSnRxZUw
Fj1JeFAIt4naCeFRJxVh5Vl+ncIzRS2HXnUjkSBQIzzomyeN9BwoiV2g9deDnjW2
EQIDAQAB
-----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 352555565771819876523672812255136787608086
 . . . . . . . . [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 2023-12-03 04:58:12 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-03-02 04:58:11 +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 'ctu.gov.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 18824473590314280897106796631258484143933460008859583011893363281390103228165791649684071409540667151857735115032518205599852788810473559296076441698499916383067548507764438686494454007356816553646682983304676032427114527540646151479819971825797359295353458229548535351022255087533078646870299670529024061874273844765569780910490204923187942542199988975458647409596754221752491253651419910147095169926823435277994321964323943724252336709844156869572744723933942542600012583764756434959209923478306553626137966874618622013801871194538356845580969532791214506382092277111163376430183092538670953970958111673151040894481
 . . . . . . . . . . . . . . . . . . . . [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)
							91b49c2f385444f05d7db88e5de59511d124b6b7
 . . . . . . . . . . . . . . . . [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 (30 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'ctu.gov.cz'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.ctu.gov.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 (12 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 1.3.6.1.4.1.11129.2.4.2
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (246 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (243 bytes)
							00f10077003b5377753e2db9804e8b305b06fe403b67d84fc3f4c7bd000d2d726fe1fad4170000018c2e417af30000040300483046022100a12981fb1b317be39b2622e4e7ab86b7d7e440a5c3354b313341768df20ffea60221008148ae2fc105fb247139a24b535ef5092d154d2ee6cc2e875eedb5ece803d3c6007600a2e2bfd61ede2f2f07a0d64e6d37a7dc6543b0c6b52ea2dab78af89a6df517d80000018c2e417afc0000040300473045022009cdd19c92dfea3b3c12e9084d3572500c7f11dae282258ae2c2c55931b8bd0602210085109ba70091ee94aeb623295c0da67761f1ea64be32236a567c26707a65ae31
 . . . . [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)
		00632bb29e7d9c5f21e4101413876430b1beaed0da6d9113ff078a0a28659fd008a8b47e9a3dea5192af3c359d23e7fd1846e41e5bacc06b411679112e08a7fd0ac70f8768ce2b5cb430f79afb03a16f878cb05d15b81614162f6bf05fa3661fcbc9463eeb529d5f50403d05b18b4ecb5b53a707fab46acebb17cc83bb5b14dcb05fa9e4c80f73640c56b40ce262a2229608ddc1802876169aa1ff292bba5bd5800b926dff1667cfa20572674fc1e5cc90d8cbba3f111d83f610af87e71a9e84c3abac86ca9f0d6021eefb6878f7b2b2c68978720e27a491d2e1781544a19aba041667e608df0cf0fe7cc28420d7700bcef4327648dffe4e031256c80d532a9fb0