srz.jeef.sk

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:ad:de:c5:b9:33:aa:5d:b0:f2:e9:af:b5:92:87:ab:77:d7 was issued on by Let's Encrypt.

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=srz.jeef.sk

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:ad:de:c5:b9:33:aa:5d:b0:f2:e9:af:b5:92:87:ab:77:d7
Serial Number (int): 320501822526487615485037785666229646358487
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 90:f4:d4:7b:c8:3f:76:15:7d:bc:2b:60:71:99:06:42:8e:85:78:4b
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 49:93:a0:99:f2:8b:f4:7f:d6:6d:46:a8:ac:4f:38:7c:90:eb:2d:4c
Fingerprint (sha256): c7:4a:ec:32:02:61:74:39:ab:fa:23:5d:c5:f6:bb:ce:3d:4e:28:53:1a:8f:52:e1:5a:c0:ea:ef:62:71:24:61

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 srz.jeef.sk

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for srz.jeef.sk

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

srz.jeef.sk

Other certificates including the domain name jeef.sk

(limited to 100 certificates)
admin.jeef.sk
srz.jeef.sk
www.jeef.sk
admin.jeef.sk
admin.jeef.sk
mail.jeef.sk
admin.jeef.sk
srz.jeef.sk
www.jeef.sk
srz.jeef.sk
admin.jeef.sk
imap.jeef.sk
webmail.jeef.sk
webmail.jeef.sk
admin.jeef.sk
www.jeef.sk
webmail.jeef.sk
www.jeef.sk
*.jeef.sk
admin.jeef.sk
srz.jeef.sk
admin.jeef.sk
imap.jeef.sk
webmail.jeef.sk
admin.jeef.sk
webmail.jeef.sk
www.jeef.sk
webmail.jeef.sk
www.jeef.sk
www.jeef.sk
webmail.jeef.sk
www.jeef.sk
imap.jeef.sk
www.jeef.sk
*.jeef.sk
admin.jeef.sk
admin.jeef.sk
www.jeef.sk
webmail.jeef.sk
imap.jeef.sk
mail.jeef.sk
webmail.jeef.sk
www.jeef.sk
www.jeef.sk
webmail.jeef.sk
jeef.software
www.jeef.sk
srz.jeef.sk
webmail.jeef.sk
www.jeef.sk
cloud.jeef.sk
webmail.jeef.sk
www.jeef.sk
imap.jeef.sk
www.jeef.sk
admin.jeef.sk
webmail.jeef.sk
mail.jeef.sk
admin.jeef.sk
*.jeef.sk
imap.jeef.sk
webmail.jeef.sk
www.jeef.sk
www.jeef.sk
imap.jeef.sk
jeef.software
www.jeef.sk
admin.jeef.sk
admin.jeef.sk
webmail.jeef.sk
admin.jeef.sk
www.jeef.sk
srz.jeef.sk
www.jeef.sk
admin.jeef.sk
srz.jeef.sk
admin.jeef.sk
admin.jeef.sk
www.jeef.sk
www.jeef.sk
webmail.jeef.sk
admin.jeef.sk
webmail.jeef.sk
mail.jeef.sk
webmail.jeef.sk
mail.jeef.sk
admin.jeef.sk
admin.jeef.sk
www.jeef.sk
webmail.jeef.sk
admin.jeef.sk
www.jeef.sk
webmail.jeef.sk
admin.jeef.sk
srz.jeef.sk

Certificate

The complete raw certificate details for srz.jeef.sk in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEArgWu0cwa8y9L746+My10
HU8x0O+z0sEuvydWK5PZeaGf1DUXfraIlG0L3aRNG/5aANklzy40s37oPJrlwOKT
Bsk83KcxbL1TtXgCibYLAQW0Aua7RUDvjmm5ADGBiOOCWWvPLn2YUEmGlLSR0NgX
P87nB8Wf3/aFL5jUbgn9+R4LOqqXWJ5Z3ecdDPSZj2QBIRA76x7FB+nqnvNzZ1j3
oCH56962N4F5ygvImje6D12wP14Cq61J4OhU0TMSSRjXkWnm3EQfMxMrR6cGKn4R
vIOo2oPDBx0GvwByW7+aHkOXD1iduoH9Mn201jZRwole+zgZbSVPUSiqT1Ct4KVK
ewIDAQAB
-----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 320501822526487615485037785666229646358487
 . . . . . . . . [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 2019-12-27 10:01:44 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-03-26 10:01:44 +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 'srz.jeef.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 (2160 bits)
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 21968267400982602112816198072438302119823660705353194378664320120768174154134492188617317990500620314213429545258416379471140035211898681650166028711399208125519562486315580866778038418952343376461296994940327622843296523373552558511579767212348256822054462686393541483049990642582086608188628789485452475912081797718880462546973487480537922536832561093542325564468790824018047968827847031120979652290136723211070877140869982336344943217767370432680959683018587329772075743294982639691559764467488241558449382661857044481062035923880103485699837876476754383854770758094453524967978645915272162951903051350222186039931
 . . . . . . . . . . . . . . . . . . . . [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)
							90f4d47bc83f76157dbc2b60719906428e85784b
 . . . . . . . . . . . . . . . . [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 (15 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'srz.jeef.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 (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)
							00f00076006f5376ac31f03119d89900a45115ff77151c11d902c10029068db2089a37d9130000016f4704f2630000040300473045022100ef1d2fda4ac564d469e92426a6507f15f5c78fbfbe01687591586d1c2a1c957f02206ed373048b1ccf717703127c81308df8a6b0c364d0e19448fb25f101e5fd81cb00760007b75c1be57d68fff1b0c61d2315c7bae6577c5794b76aeebc613a1a69d3a21c0000016f4704f2740000040300473045022100e70b52a4b20a08f7ef84aa0dc4f04afc2c815e03476de9297836d21aa8aac993022048a10396f897d4383c263953f1453afef868a43cb77f9f5f395841d78652ab74
 . . . . [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)
		0098647d52658c9758548e98236fe380224fd385d303417bc2e712b336467e44a35795b8e365a3eb59b5b9ff864dc8860f7ec6077ec01ccda3a8c7755bf789fabe62b8b7bd38ae6a583ffa7e031df31bee60905b20e85d904576767d93c8e9dc55011341a889e5e4d39682229a9bc1800cadbc3218d28a6766c3b39c62685c3f0bcc568467ed51b0202f0c9230eaf1a6001e6656b605d90745a56fbfd48cbacfa5004c95db330f3669e03e9b1798e075f00fc2a7a538528da827701c84e0496a76b9f623d61e8270bc940dbef94e0d71c590c6dfbff3f68c48df810454182b1ba2cc4e2b3ccdd26cd6cc3b0b44aa83f093e4c146cadb36f3433920cdc33947d6ad