www.esafirs.sk

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:83:8a:21:66:d1:68:83:09:bd:0f:5a:80:0c:33:1d:a2:97 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.esafirs.sk

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:83:8a:21:66:d1:68:83:09:bd:0f:5a:80:0c:33:1d:a2:97
Serial Number (int): 306097454756535139087590497478303025046167
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 2a:b0:43:95:30:ea:7c:93:2e:61:4b:b9:1c:8b:f5:78:85:79:7b:39
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): b4:27:bb:99:8c:72:11:11:a5:5b:bc:0a:a9:a4:57:9c:cc:16:42:97
Fingerprint (sha256): 3f:9f:07:d1:66:ba:78:e3:39:39:15:ec:24:92:7f:65:12:f1:e7:38:6e:4e:53:5b:0e:62:47:54:a1:b0:cd:9c

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.esafirs.sk

2

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for www.esafirs.sk

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

esafirs.sk
www.esafirs.sk

Other certificates including the domain name esafirs.sk

(limited to 100 certificates)
esafirs.sk
esafirs.sk
esafirs.sk
esafirs.sk
esafirs.sk
esafirs.sk
esafirs.sk
esafirs.sk
www.esafirs.sk
esafirs.sk
esafirs.sk
esafirs.sk
esafirs.sk
esafirs.sk
esafirs.sk
esafirs.sk
esafirs.sk
esafirs.sk
esafirs.sk
esafirs.sk
esafirs.sk
esafirs.sk
esafirs.sk
esafirs.sk
esafirs.sk
esafirs.sk
esafirs.sk

Certificate

The complete raw certificate details for www.esafirs.sk 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 306097454756535139087590497478303025046167
 . . . . . . . . [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 23:13:00 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2017-03-16 23:13:00 +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.esafirs.sk'
 . . . . . . . . [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 711830325290086348160178309486265315805004049390612745810978531968418461916469073452505239909061925173671669358077700242304904797440856872018316728900609051212954560633303912872875931811349412484690736717231702019944399833338347269525795836580071194260603363345087335447285064130131592814835215890795168018787049566606930147873401693225435803177777759232724676483573516102253124353709313043493841469205601011117562282610817908593847147045939543567119849671412070775373482276879424848400526403281067023185574572946039224373882415405629379984336500135681691107666263135073947441912724281288398389338557302853140691245327788225339782876829469112958453201900406283653641224260543094399382269439459260391627137815354530365220716396474614100323409306332705193758274819381999373045140917126094163580789778746756820870066046043882622910774641861227360063708982047067615313804018382903769647828273287759814549199850888818483975559187117263496279434171863042870218679866172675975895188128556622216289877975712462992512710223494945656070737097144826479640814990564334964689903493633927252587587632761702406865647292580457727446230793979275804966416022190407236328083301560629763169262774485539777294666948094007104384418890788440673817547657571
 . . . . . . . . . . . . . . . . . . . . [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)
							2ab0439530ea7c932e614bb91c8bf57885797b39
 . . . . . . . . . . . . . . . . [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 (30 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'esafirs.sk'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.esafirs.sk'
 . . . . . . . . . . . . . . . . [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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