www.intellidynamics.com

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 04:42:3d:0d:fc:08:6e:d7:d6:c4:61:e6:9c:4e:2a:62:2a:7b 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=www.intellidynamics.com

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 04:42:3d:0d:fc:08:6e:d7:d6:c4:61:e6:9c:4e:2a:62:2a:7b
Serial Number (int): 370988935463260315700760295536321697557115
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: a1:ac:75:b4:fa:b0:ee:9e:92:0b:4d:23:18:a4:47:55:63:4e:f7:13
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): b8:07:7c:a8:80:d7:5f:92:84:d8:8f:b7:55:39:be:a3:d7:11:8a:a0
Fingerprint (sha256): fd:d5:f8:d4:af:8c:d6:fc:03:57:74:87:2d:2f:26:cf:7f:9e:1f:73:d2:c4:26:f3:11:8d:fa:6d:1b:b6:2f:1a

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.intellidynamics.com

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for www.intellidynamics.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

www.intellidynamics.com

Other certificates including the domain name intellidynamics.com

(limited to 100 certificates)

Certificate

The complete raw certificate details for www.intellidynamics.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 370988935463260315700760295536321697557115
 . . . . . . . . [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 2019-12-12 05:30:53 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-03-11 05:30:53 +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.intellidynamics.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 782572489487289681208850532587582632120380651552800886383725252904803901315575223969662374309921938302872389099869512274245542770779545979600758684629492634373977136189199811357004635180712812878057309547699939103397977233607738771688762620594735910701804980990371111524742247292445707241607138479043604306932601222576026153944589352478921590273174680926561173807943816253957616173945002216860559397089791469346137645929767117539896471200573167243737250461572965866781955209679100541794754554092540884099014886215955524642444987022959154543967121032650015875109507835902530582980677268935903984429738663794048513870774218525119026834872958070776976435374269493908714934651798383664046679131183669008074636381717082393432259810873149296954151494519705350830056623541030167328506712860038741667449884880676886412079515001799273392838231957533874529709417279718367025926857375682389568783897643197959682345737794204082182516138403539816369959544482087762515966245956145093574511398946134768744321544930088852141611321237449428284670874899170625057562283900496341835877283197883503376454656341698594123909102758527280176831104426397944777705366222267030901160671275250763032377143752225129411840383735127667222699249539667650226709458517
 . . . . . . . . . . . . . . . . . . . . [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)
							a1ac75b4fab0ee9e920b4d2318a44755634ef713
 . . . . . . . . . . . . . . . . [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 (27 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.intellidynamics.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 (245 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (242 bytes)
							00f00077005ea773f9df56c0e7b536487dd049e0327a919a0c84a1121284187596817145580000016ef8cd95e50000040300483046022100b60a9db3dbdca05edc6ee4fa956037308b515d59152847ee11851f476ab589ca022100a02f7f5215cd03ea00c7c6338c65e4cfccddbbc50136225073b820585bfa28b800750007b75c1be57d68fff1b0c61d2315c7bae6577c5794b76aeebc613a1a69d3a21c0000016ef8cd960c000004030046304402200733aba6034b665acccf8931b37b354deea572ebdd9d20eecaad05bf4982da27022076bfa6d58c21f322da2a085e776e7a921991f1851c5e26b175e71a06a0481e24
 . . . . [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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