www.dufy.org

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:9d:c0:e8:13:01:a4:e5:1f:c6:5f:3a:b2:68:57:ac:a5:90 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.dufy.org

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:9d:c0:e8:13:01:a4:e5:1f:c6:5f:3a:b2:68:57:ac:a5:90
Serial Number (int): 315017606175426005798800934927747953501584
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: de:ad:1a:b0:9c:d5:26:fa:15:37:cd:40:c7:8f:2c:61:bd:68:a9:31
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 12:c1:e7:3e:51:84:65:b9:83:17:96:b6:c9:9c:ec:7d:a9:71:7e:64
Fingerprint (sha256): f2:6c:5d:07:1f:3a:71:ce:7c:88:5b:5f:f9:99:2d:93:52:fe:51:5e:57:d0:da:30:8b:97:4f:f6:94:4c:51:84

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.dufy.org

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for www.dufy.org

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.dufy.org

Other certificates including the domain name dufy.org

(limited to 100 certificates)
musicguide.org
www.ocnb.com
www.dufy.org
dufy.org
www.workwelfareandfamilies.org
dufy.org
www.dufy.org
dufy.org

Certificate

The complete raw certificate details for www.dufy.org 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 315017606175426005798800934927747953501584
 . . . . . . . . [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 2019-07-27 22:50:43 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-10-25 22:50:43 +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.dufy.org'
 . . . . . . . . [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 750562644632973382488878668680143135816195692787811750638835618815394955015319428278826764064220982033165388653782516572570572686755102916645978387929014057043441078142020073751152696083702213411023281943655638016169901239442177740684292678225744204892059060403705991802296663859795631614513416418022113491386999976748853726200982186174544050397448730848611678478536900665323623892401399073880958595780569132899483992018715104053238705516086441848485405656381547887043553093756461645358816508024052223609462566906660453655616891912578096392215815953179208545450090400252379283849907420672399388926768771057336485711563536768030274034547464896153324816908374250272655566021333429245817541715038600103770737961366777251420270741146192569523824663223030745760571404091873450409492195914984329330463903615613706022275153508532813608932353433405189271304879212551891059771007457062215856398942106279344148738472831639666745275346015967535043597117575997911359040060793309218470981866203279125314579797590949776201995448539647377284183324984423633902786505865376106749634258230215554647707769383206646555344560667369130087806734404764692287550519254035506248763731733437217443448533924956959260681866715087829461460027317388729449532191133
 . . . . . . . . . . . . . . . . . . . . [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)
							dead1ab09cd526fa1537cd40c78f2c61bd68a931
 . . . . . . . . . . . . . . . . [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 (16 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.dufy.org'
 . . . . . . . . . . . . . . . . [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 (246 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (243 bytes)
							00f10076006f5376ac31f03119d89900a45115ff77151c11d902c10029068db2089a37d9130000016c35d7ff7e0000040300473045022100be7bed588d034694c26260e14cf4595d2fd8663823b1e1463b5742fe57a64c0e022016f4e137d651fad52bd66829fd6d154774981e07613f6473c224cf0d5013715700770063f2dbcde83bcc2ccf0b728427576b33a48d61778fbd75a638b1c768544bd88d0000016c35d7fe250000040300483046022100a9c90758b42a896f55ea995b721ac4515191d4de47c3c4d309b9fbc80f75c4e1022100eb671a74dbb93b262843e9bdae66843f7bc1e9516fb1ac53a7abe980cab7bed3
 . . . . [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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