www.arthritissuffering.com

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:09:00:3e:fc:c3:08:35:f6:71:cd:e5:55:68:1b:57:ee:5f 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.arthritissuffering.com

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:09:00:3e:fc:c3:08:35:f6:71:cd:e5:55:68:1b:57:ee:5f
Serial Number (int): 264399726146593668197806015091315731590751
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 0f:0c:e0:21:22:0d:74:49:4c:74:b2:5a:33:e5:43:0d:28:ae:59:9b
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 6a:2f:b7:9f:51:29:5b:4c:4b:b2:92:a5:c8:02:61:80:54:5b:c7:3c
Fingerprint (sha256): 71:6b:3f:f2:f9:dc:85:d1:0b:68:23:1b:f5:17:46:cb:75:78:3b:9d:2a:d7:87:55:05:04:ae:f6:8a:a0:cc:38

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.arthritissuffering.com

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for www.arthritissuffering.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.arthritissuffering.com

Other certificates including the domain name arthritissuffering.com

(limited to 100 certificates)

Certificate

The complete raw certificate details for www.arthritissuffering.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 264399726146593668197806015091315731590751
 . . . . . . . . [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 2020-01-26 03:01:50 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-04-25 03:01:50 +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 'www.arthritissuffering.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 850541739753688486519875651123743458810249687303882800339579835177288182617999392257209407891010562172140222780027064494105925033181462516344970305830245963587152166553279828566904047009190425322991242217325054552383395299483772027716192193206124802197490433349000699089155788095083181195717216960193906872238202993631045075116031354602128084286360448565703711917495971184144967464278618283951802238661109892358612164881239708736220520064372840377305342767871645229344656609327130078021913358317117187336416688854522407137217849008610566141208210527828473666019388867727167731470434198557214907627264766873475723222814997182063166895928455047133497786504891526738439521320982747195622828302082959795688012349109876733382514152147153462390513907398679047769590008928506956078520038015823048179586491359175609060243527464344581451781218177509406073792678122346027650783194849356017345765195358444364433217156124356301893245260680913617206258451529607510016402918087215079086551623526800431100750556500128074609980282695366537011906444600601574846133601746022384898052814856965680918345567138385821384467802140269149483189174976514385165518534252407474673686402391429063703323407999566416545112621787520262808901283287459852137288340027
 . . . . . . . . . . . . . . . . . . . . [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)
							0f0ce021220d74494c74b25a33e5430d28ae599b
 . . . . . . . . . . . . . . . . [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 (30 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.arthritissuffering.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)
							00f00076005ea773f9df56c0e7b536487dd049e0327a919a0c84a1121284187596817145580000016fe0034c340000040300473045022100c3fa94f35e6cfd17ed8e8905c7fda953849c9d38aabb5b9a633d5c4d8ccddacc02207901a0e936b7b35bc413f76d5fdbcb24736dd731be99c9bc663b9be2c2bfe0c600760007b75c1be57d68fff1b0c61d2315c7bae6577c5794b76aeebc613a1a69d3a21c0000016fe0034c51000004030047304502202e1bb3c2aa4e9468736a0132913a3d63e5243283c63385aed197202a5010a0e0022100dbc10ce8fde90a9b80c4c3aed2a689c6dd1003bd98db7592d125bca740f5935e
 . . . . [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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