onthevibe.com

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 04:b7:33:c7:8b:26:ee:d0:7c:2b:3d:0f:c1:b3:04:1d:41:ca 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=onthevibe.com

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 04:b7:33:c7:8b:26:ee:d0:7c:2b:3d:0f:c1:b3:04:1d:41:ca
Serial Number (int): 410789643590772119098912570444776573059530
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: 10:6f:8c:dd:bc:46:7e:af:df:a0:d6:52:4c:47:83:4b:09:72:4b:92
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 18:2c:eb:58:5b:a3:81:03:7e:ee:cf:10:10:d7:02:43:d3:ac:f4:4f
Fingerprint (sha256): 08:d5:c6:d5:11:64:b6:cc:b6:6c:34:2c:35:0d:5d:0c:8b:18:e8:4a:73:98:47:00:18:a3:8d:b4:c6:cc:b0:26

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 onthevibe.com

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for onthevibe.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

onthevibe.com

Other certificates including the domain name onthevibe.com

(limited to 100 certificates)
onthevibe.com
onthevibe.com
onthevibe.com
poetica.org
onthevibe.com
www.onthevibe.com
www.onthevibe.com
onthevibe.com
www.onthevibe.com
www.onthevibe.com
onthevibe.com
www.onthevibe.com
onthevibe.com

Certificate

The complete raw certificate details for onthevibe.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 410789643590772119098912570444776573059530
 . . . . . . . . [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 2019-10-02 22:57:56 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-12-31 22:57:56 +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 'onthevibe.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 775896489526767285722875562036040444804719159276157875835490020461162416397305124208357432258938736994467687221724466603492420493563138043275504572013492026240021403280278613920922029697856355234817272743135764366470361591192520816719584424471957933061153098169143171248056218948457432476787506125003195114084662867585750038791100925980544474826340484758558138117607394570350436654906609398123286251248250745230580954442764921656936422649501423188403576561120858057991034519993181887594996903982267021632981302742463648173881206634131064258200075565111333320606338151655276752490336920456893316684143889402783234722296126899513279216506914248524844145990749076214165319108226002778272773340155759444714172490324228040755191567978804522805566871817291951593037997706513778335911981090356874265499637147616451775882354360895887998158609866838704593747006168335322800913861731037924557349970172475513982967832384374520759421203888770630026766815859406175123726004022647954310558602398348884661546338400933918003712061087959658911842813990587189822854713305610665652573781985336085038876561763465705361916479906961150502542059804760315612152040785580767346654754983650371419135768816194847800168485348621117423782387962807175239774144687
 . . . . . . . . . . . . . . . . . . . . [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)
							106f8cddbc467eafdfa0d6524c47834b09724b92
 . . . . . . . . . . . . . . . . [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 (17 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'onthevibe.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)
							00ef0075006f5376ac31f03119d89900a45115ff77151c11d902c10029068db2089a37d9130000016d8ee8acce000004030046304402206d39213f157b6642a4b701269f6de55766922ae7d4bab82995a2396d6d016e1e0220403b3f589e6826c1376559230e523b823214c0de096f650ec664ef28b65219e300760063f2dbcde83bcc2ccf0b728427576b33a48d61778fbd75a638b1c768544bd88d0000016d8ee8ac990000040300473045022100f3be31555d972c6358bf17dc56ce6245ae6ceb873e07c046fcfc07645ba2b3c90220079519541f03c35fb59378cbf62a8368b8a153ee25ac28151414fe47ec63333b
 . . . . [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)
		000c9e2fd460f4343bf8a1973da19416d3ea9eaf07ab64e54d93a540d7ff7e754aa8d83ecc0d32b414debdff5113fac2a94137c98663e2ac87fedc739e75db63fe446d843e6a3ce5a9383742437860464bb91168de2ac6fe584ded4eef979d78a35e9d4ca47b5e8c192c309b3a68f63e9a995df69ce3c94ebb26ef2822b443eefda7ee0a37d0399f9e57c25b02041445fdb0d5f2489460822332e8af9b12d1e146447d05745e62725d026da291d4c399f20c9844a7e8e6eea1e463b00484abc38d2d3a671695d7f49a07033ddda5938d72d8be8bf401c8094d889774062805c427535e2fa9c85b74c8b15ccac7f9b1393bdd05e7887314bd70845f6f43ef72398c