conductive-cases.com

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:1c:59:ed:a1:4c:15:8b:2f:3e:67:2c:5a:1f:55:fe:3e:d0 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=conductive-cases.com

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:1c:59:ed:a1:4c:15:8b:2f:3e:67:2c:5a:1f:55:fe:3e:d0
Serial Number (int): 270984299206543301171683147907816606285520
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 22:cb:a7:e2:0f:b7:da:7b:e8:9c:5b:e2:8b:b5:92:eb:ad:17:f3:e7
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 12:c8:04:97:b4:e1:ba:19:4b:3a:7d:25:98:0a:23:c4:c3:66:09:e9
Fingerprint (sha256): 91:2d:f9:5f:0d:e9:c0:af:f6:00:19:16:d0:d9:cb:51:d8:4f:47:53:87:ff:3e:bc:c8:68:22:62:24:7a:c5:66

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 conductive-cases.com

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for conductive-cases.com

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

conductive-cases.com

Other certificates including the domain name conductive-cases.com

(limited to 100 certificates)

Certificate

The complete raw certificate details for conductive-cases.com 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 270984299206543301171683147907816606285520
 . . . . . . . . [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 2019-12-20 08:38:49 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-03-19 08:38:49 +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 'conductive-cases.com'
 . . . . . . . . [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 730577441618525411397369767700570330866973801537733758128946098224780017040531975892989182249257092124601604285647970471493607030447397967495003140344527619996723003998205676194889207535331795084904164354233365858643732509490593843029061052620451988785793993391939925356838783323516099086563753109323972586968142619679641652887485125220897059489519636275608864911601104873799133592559291241574048641899880178858716448108181077164111241634982017002975328815580304758356246015196654255520029473297138297485592371379797125749802525411379445996341032659021608198925199808802799164398392493031129424948904089201265134074429141382315462991452223928091978080515542378970694811318484752817145152575076251333049413718319879593814227632969653899443901508241951094548024990750802019597475225983534927931128556655209213638602899983835370951014454451442067848229593735902739022155467499677829039853396895473823519439885655766732597385590564088798935305448060501806244625307067798906345701706726546937427189158484427971069041019152648189012406885670708012337004832083878590899733898751197820258366482158180519523133244188467863403370364354587623982872173642401178428164255291050026078937991573036438302978723377910677687670440691884767133605609571
 . . . . . . . . . . . . . . . . . . . . [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)
							22cba7e20fb7da7be89c5be28bb592ebad17f3e7
 . . . . . . . . . . . . . . . . [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 (24 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'conductive-cases.com'
 . . . . . . . . . . . . . . . . [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 (244 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (241 bytes)
							00ef007500f095a459f200d18240102d2f93888ead4bfe1d47e399e1d034a6b0a8aa8eb2730000016f22ac86cf0000040300463044022020290ca90f632d663e8761c09af3c0a4043a6c8858779965f113a1ac315bf39d0220446edbe9007148139050acdd75b69fb5d688953b9a0d48a265349b6368689a8c00760007b75c1be57d68fff1b0c61d2315c7bae6577c5794b76aeebc613a1a69d3a21c0000016f22ac87230000040300473045022013f1b005c2e5b68eff8f91c99ec29eebac36d37d337bb788bc9dd93d060f0964022100c7cccdd001b502cf37136f16e06858a376c18753d7e20c73c5915ec748b6f069
 . . . . [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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