www.cfrbooks.com

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:b4:49:b8:b3:ed:ae:e2:c2:13:46:8e:1d:44:8f:69:b1:0a 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.cfrbooks.com

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:b4:49:b8:b3:ed:ae:e2:c2:13:46:8e:1d:44:8f:69:b1:0a
Serial Number (int): 322685676516746450725253226063742099894538
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: b6:ab:ab:66:f9:1d:97:49:79:13:db:a0:a9:cd:fe:2b:ea:98:3c:12
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 78:46:cd:6e:e6:07:6e:13:ad:a0:da:d1:fb:9d:3c:84:05:93:64:42
Fingerprint (sha256): b0:51:ca:f6:2c:98:bf:e4:79:99:0b:7e:12:15:a1:89:26:07:13:dc:33:87:f6:5e:cb:54:5d:c7:28:1f:2d:28

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.cfrbooks.com

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for www.cfrbooks.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.cfrbooks.com

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www.cfrbooks.com
www.cfrbooks.com
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teamshogun.org

Certificate

The complete raw certificate details for www.cfrbooks.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 322685676516746450725253226063742099894538
 . . . . . . . . [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 2019-09-21 21:51:54 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-12-20 21:51:54 +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.cfrbooks.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 696610708381136512460372515387688299929079518479401164720857625096503736983974800878446647897798378512737909403153033931961125323917222117135994943451677812248686426530626721193590648460351661581391467907044581625367263353380996677382016770795164398341075730343102498823281142010117232435788412644633335188007033517992543073070536438580969700294626339265282162453333235845019305217109206314028939186121707406827855599587482733187777194320667367525170657568535893922672947873674648113583086605718792228299218877877404632796673718397892050955827545576576190119464371235694951493787169811675886082557591377299297474709711732955489306221533771158030587941589026002575382522778294458580553932514335124954551347680941271999688940223701486965624587671091362739608285809322528491114844163087167037055934886272815128704375194593297181028891922191204463578027505690150686411297606916016589729459337149138453540444355296357357258051122683345683185194653994556642877585165932256878034010526131629148204579560117513529642984496825640793757398513436731447190006929769016136956197145628441740136369666766651117021728105428298004084944200010674866291550758058539142658909508671620661822127787902940292266480890155533135171517258358391780027339093241
 . . . . . . . . . . . . . . . . . . . . [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)
							b6abab66f91d97497913dba0a9cdfe2bea983c12
 . . . . . . . . . . . . . . . . [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 (20 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.cfrbooks.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)
							00ef00760063f2dbcde83bcc2ccf0b728427576b33a48d61778fbd75a638b1c768544bd88d0000016d5606462900000403004730450220194c25afce9e29d108656bc8739bcdfe4a9ad9df9c4e6fa20ec606c4c9c1902602210086b149092341893ee5b6a5b66b148ce6c47c4940e96f89d8c1c2eed54bf04df0007500e2694bae26e8e94009e8861bb63b83d43ee7fe7488fba48f2893019dddf1dbfe0000016d5606481b0000040300463044022037fe9068b55f1182c70bd7194a6ad2b02ba89b6618e41ba654bc204f05b9a93d02207b79dbb40345aea4264f46e828b33e373c65d46e85843d10de48c4a7b1105c0b
 . . . . [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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