curante.net

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:30:09:9c:d3:07:88:81:cc:59:8f:d0:c7:c2:6b:72:92:80 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=curante.net

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:30:09:9c:d3:07:88:81:cc:59:8f:d0:c7:c2:6b:72:92:80
Serial Number (int): 277683188737943052247963493448175871758976
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 41:84:a6:98:e3:29:5a:47:d5:80:85:11:e7:10:54:01:85:98:fc:47
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 8a:98:9a:c0:03:9c:ee:b8:46:f1:09:0e:e8:29:c6:20:8e:69:be:65
Fingerprint (sha256): 01:b2:46:d4:77:9f:a2:bc:ef:d0:1f:3d:50:63:1b:47:c9:4a:84:f4:04:fc:12:8f:62:0a:94:b5:14:47:17:91

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 curante.net

2

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for curante.net

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

curante.net
www.curante.net

Other certificates including the domain name curante.net

(limited to 100 certificates)

Certificate

The complete raw certificate details for curante.net 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 277683188737943052247963493448175871758976
 . . . . . . . . [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 2018-11-30 21:05:50 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-02-28 21:05:50 +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 'curante.net'
 . . . . . . . . [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 630024624971842347498722738927249307926469942114092986415532825484519040009018343248917102093736947940341229671934735575321206460821824773529262992723057016235260902904063838274139993101816861244727293064118559104423472381415035668936011578299680530271340141126168727207895069889690933383359536728350142348975107959267251480182411664614360652062572732151071928276312074877039640697184903186787431244735170840802127375387607111958895069563583056234801377101738749412749568654589055841021915476361246423385030753035980025066633706475155262047878741005211300921133287860795964608971974214205439028133898152064592876233279377090813523812888140196856640577741281492561920262362604278064191538212692001614223599045114262025130367744078585047798648615037873616871729319200968230072427353236623599659521909624125961821387641780922299402130883941000357671382408883129854779478485195248566123281142643585239610827442254690470086821914630296967636651295558128363737933235770347005675613799989641798289631655108373566372456357307774271443990084284169849345340012351865311265434130563442734742375636321223573005715250938776847916097063229580721597007615109793812908158954616352334489003150463666145020554217867394947545562682003715613397615979363
 . . . . . . . . . . . . . . . . . . . . [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)
							4184a698e3295a47d5808511e71054018598fc47
 . . . . . . . . . . . . . . . . [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 (32 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'curante.net'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.curante.net'
 . . . . . . . . . . . . . . . . [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)
							00f0007500e2694bae26e8e94009e8861bb63b83d43ee7fe7488fba48f2893019dddf1dbfe0000016766a817e70000040300463044022061981773be9b08d91d725f95808b27fd9c5c22872cd70652c5b9e7fbd3bb46c502204fb3a1a461b4ad80ba71a80e57b5673ed95184bb420abe372a80b2754f47e293007700293c519654c83965baaa50fc5807d4b76fbf587a2972dca4c30cf4e54547f4780000016766a8184600000403004830460221009ae546ce9194e9da48aff1d95f2a307f98728526b0f392238cd778e08d5c7edd022100e5c26fe06e2ba28dc882f6aa82b328ff26d1b8c6ffcbf01c6ba3be061af61540
 . . . . [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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