www.vendinguniversity.org

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:d9:60:b2:5c:12:d0:19:51:f2:fa:bc:83:7f:0b:56:c7:08 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.vendinguniversity.org

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:d9:60:b2:5c:12:d0:19:51:f2:fa:bc:83:7f:0b:56:c7:08
Serial Number (int): 335306663401032751587933264084945985783560
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 2f:23:2f:26:03:f7:e4:f4:90:8e:4f:15:ad:d8:42:71:f6:62:6c:af
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): a7:5d:c1:65:a8:59:6a:0d:70:aa:4e:5a:32:77:45:36:31:5d:ea:2d
Fingerprint (sha256): b2:ba:3d:af:04:33:17:97:73:54:ec:25:7b:01:e8:79:7f:c8:53:62:6e:74:08:d1:dd:9e:cb:35:00:22:33:60

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.vendinguniversity.org

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for www.vendinguniversity.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.vendinguniversity.org

Other certificates including the domain name vendinguniversity.org

(limited to 100 certificates)

Certificate

The complete raw certificate details for www.vendinguniversity.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 335306663401032751587933264084945985783560
 . . . . . . . . [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 2020-01-09 03:07:20 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-04-08 03:07:20 +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.vendinguniversity.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 841173381792735761819433535375725578005820680584169224912145012938184144430302697198448102276090533003561876923462507695883260390798708773347779909417013836245597815413869071111189543698976117342109011272592999652919645491318564909259688332109747084437302177485621380578989683731639027244324191300778697132269821985579664273241614773888853916090762027262067334941285257089846386380659482831812887027786879544747019492103113906201587536569256729546704945288801060479301825709670146479282564179913848731395131378648082976883045690915481464472491875338432897113986808079372417923016392033978227760058714499167011799741590262478738344506367556382851008115957361086351498447468370747253629953126653288235623871622472183727648338032392412713278284656209092029632992866559266590287318637882313704949282896899494479315114724620080148048054738083496823924429964276124338734860324449691632462733096188515140639500328189215516908481560126852745355610568234525057544259481963052882398199918547251446637533863262795892977795666092520960933400426925385698061085035912362618904130756944430345852201252057388161514139692509039566778876743474345887410113902487872595516639911665231391578077851545650479346989267195119178064158049444681093060093056977
 . . . . . . . . . . . . . . . . . . . . [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)
							2f232f2603f7e4f4908e4f15add84271f6626caf
 . . . . . . . . . . . . . . . . [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 (29 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.vendinguniversity.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 (245 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (242 bytes)
							00f0007700b21e05cc8ba2cd8a204e8766f92bb98a2520676bdafa70e7b249532def8b905e0000016f887c3e4c0000040300483046022100b9245d1849e45c822f518a86fd4437e0c374344e560e4f7a1e04f777cdb40f700221008f39f64d9945630262a6d1362f394b15e26ff8d3d727e9d31f7dbbd74a32b9ca0075006f5376ac31f03119d89900a45115ff77151c11d902c10029068db2089a37d9130000016f887c3e960000040300463044022040d8828bfe90be1f04790298bf978fa4be12fb9e2b276b3b293d1c6530908707022022567b015d6b3c88520a9a1425d96ac519ad115e810b8cb9f73dd359cdc087ae
 . . . . [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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