szu.cz

Issued by R3

About this certificate

This digital certificate with serial number 03:30:cc:f5:37:ce:f0:e7:24:4e:a2:63:01:f2:d6:6f:11:f9 was issued on by Let's Encrypt.

With 3 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=szu.cz

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:30:cc:f5:37:ce:f0:e7:24:4e:a2:63:01:f2:d6:6f:11:f9
Serial Number (int): 277942847163284335571412567552878791561721
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 9c:22:c0:79:15:dd:d3:53:e4:dc:60:5b:8a:39:69:2c:bf:2b:1e:26
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 91:6e:73:37:d4:39:0f:64:3f:bc:0a:89:63:a0:6b:f0:e0:12:b5:a0
Fingerprint (sha256): aa:a4:e2:d0:48:33:41:66:4b:cb:49:84:6c:05:75:83:53:f6:48:9d:65:5b:ee:c4:92:0e:d2:fe:d5:46:e5:39

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

Revocation information

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

Check the revocation status for certificate szu.cz

3

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for szu.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

szu.cz
szu.qcm.cz
www.szu.cz

Other certificates including the domain name szu.cz

(limited to 100 certificates)

Certificate

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

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----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-----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 277942847163284335571412567552878791561721
 . . . . . . . . [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 2022-12-26 18:35:06 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2023-03-26 18:35:05 +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 'szu.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 768346655343891436858169068034349466812038665274846808631350866095413108154973952505623955734694074524103232639501711377474476832529638047146445563230955765036933390540149091467398726982645624861520037637858608405568123937146419338792757582921817517999991240873941667363554630270893269861101429250393942219810829391303046514565055171859752359408391497837187163857086537664123420012939982315114984129572861571218718234103487882732677708558074475053729101546240255302839014069531280286714798677598159083353344637036243763041808150296430936276097642213875561606361860216828636745991604846731080927182126448409369222565072092375492029661463285607246967145094617931070263801144161562609700122392032736436089089557453307921294817661784857017196139110244260950881063582780783080622788882681079381585426610352202115614816911266503739909583530833821580965284915858802212899039146959260100654356070426789742576616719641546676171563396034248818297247781188501550465840905694328087114936449988057411457847012869539044203030601514965383772434747019480930512665342132421458668844602449620211216315288116840234134549812251338402843031923718255150408767679101308097620221143503916376220882071582362395293312859349288371191343368972095317204658972357
 . . . . . . . . . . . . . . . . . . . . [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)
							9c22c07915ddd353e4dc605b8a39692cbf2b1e26
 . . . . . . . . . . . . . . . . [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 (34 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'szu.cz'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'szu.qcm.cz'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.szu.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)
							00f00076007a328c54d8b72db620ea38e0521ee98416703213854d3bd22bc13a57a352eb52000001854fee78a000000403004730450220042503e2aee669708d7097ed8dc6c4a8fdcf4e9e73450d0816bde1946680b6c0022100d0d6d4dc14aab8c93fd69da7d2c4c1c43e996590975d66f8f4b5af60a83facfb007600e83ed0da3ef5063532e75728bc896bc903d3cbd1116beceb69e1777d6d06bd6e000001854fee78870000040300473045022037519f92e1d931493a3cf709a3afe65a9e32523c8ed974cf224641662911d059022100e25de5c67e4f6c8688a435f11e7a7ee8370ffc99d287670d99c6aec36775b1fc
 . . . . [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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