bcndp.ca

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:48:8f:a6:e6:a8:68:2d:00:fa:bf:13:79:ee:ae:e3:2a:b8 was issued on by Let's Encrypt.

With 2 subject alternative names this certificate can be used to secure multiple fqdn's. 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=bcndp.ca

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:48:8f:a6:e6:a8:68:2d:00:fa:bf:13:79:ee:ae:e3:2a:b8
Serial Number (int): 286028134416560850050035613984718688823992
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 65:11:9f:e6:73:d6:f1:0d:c9:44:45:90:0d:84:42:e3:8d:5a:05:c0
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): d4:c7:9c:1d:77:ba:1e:43:4e:a8:f8:6f:4f:9a:94:a6:71:cd:d5:15
Fingerprint (sha256): d9:c6:70:9d:98:79:06:80:df:4c:c7:3d:6d:af:be:c9:8c:11:bb:52:54:52:06:5b:58:69:ad:14:e1:de:85:22

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 bcndp.ca

2

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for bcndp.ca

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

bcndp.ca
www.bcndp.ca

Other certificates including the domain name bcndp.ca

(limited to 100 certificates)

Certificate

The complete raw certificate details for bcndp.ca 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 286028134416560850050035613984718688823992
 . . . . . . . . [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 2018-12-04 18:50:41 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-03-04 18:50:41 +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 'bcndp.ca'
 . . . . . . . . [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 789319115748365763594047844974999416903146202210405934233115346458218405620662784684762508505518462207698744049464773779309030564131185032627707546707023835918623508507378456469826512461848292566258278287277402798058890627477286830188415079602057860032139533715690599814085254373811093749457687334995402788335521929452255961830268182799538872168144189878126828184648338604350892708058626444137545285263918989135717813188307182710595465685719108872844494464554947776931426332700278902652831364681424868864711658789920494672797146167973644343232162542232294145237284648584234052220420056886082364201252290786606218575093159520810388278268550815884603630367344979395490083893200484788655411389696739900540787909768394201017698048482803894356354772303361969485500550893673342443238386319580670833962664314171364970492770787142664339924378625783650880623515654702313149287864619377320365641647050919489917686566088486761058687417921331901873819278902442073014371303541195313910224160674731002668199484542611500759655062512496914581123339717924473697457078361960128086024511484328480787722697708045720930717705627753256194616996087161070371013617447502849916855128322554159663801880123644624357357652619652797455995349873523454908774952981
 . . . . . . . . . . . . . . . . . . . . [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)
							65119fe673d6f10dc94445900d8442e38d5a05c0
 . . . . . . . . . . . . . . . . [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 (26 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'bcndp.ca'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.bcndp.ca'
 . . . . . . . . . . . . . . . . [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)
							00f0007600747eda8331ad331091219cce254f4270c2bffd5e422008c6373579e6107bcc56000001677ac5ca14000004030047304502206fd245147332d19c15f88058b418d878a506203afe1f85ad172426ddb056f3dc022100a9690ced8150c4fa053d87753fa5f4ae43f120d31bbabdbc8cc957364c29f8a600760063f2dbcde83bcc2ccf0b728427576b33a48d61778fbd75a638b1c768544bd88d000001677ac5ca61000004030047304502210087d066b22dcc9e1f5bd30f53e30bc0ec347f65f89f4514190a9fea8d57f9d3a402206b9bfefd20534abdd563958862573aa749145ecc3f6baca75ee59737e2a0f913
 . . . . [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)
		0027b3ddd9356fed08e1d607a19725dfff036102bdbd865c3317c90dc404ca81f1a05e3d82ca37f8b01986293795622c3d6f7605a0eae23df81cfa99769387a663587e1347d432e0fc6b30a601d27bcb565cb557600ac0ea2697736a8e368b8f734577ed15ecb5f37f71387d5f71771b3271d9079145257c4c82f6d48c3cf46b5f77a38ec005815f2ca9d63ff400d8b8dae57901afbdf36f51b86543fa3eabd82337d5905215cd697c3ae83ebc81b1c2094f37d69468770775d84b1499edcc6efb961bc97b0e8cd93baa9128dd1437ea7111ce431ed19e6402ed111f53185413738dd5715e4062e3a299d60885f7e3294ea6ee9462e6d5bc69d70a67ae8614a438