casystor.com

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 04:3c:3d:7a:a9:f6:15:a5:c9:3d:27:e3:e2:17:61:7b:d2:54 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=casystor.com

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 04:3c:3d:7a:a9:f6:15:a5:c9:3d:27:e3:e2:17:61:7b:d2:54
Serial Number (int): 368947805557480966115447489597492543869524
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: 73:f2:6d:96:ae:fe:2f:e8:90:8b:a8:3b:29:5a:51:25:c9:02:0b:59
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): b1:7e:57:6a:e9:80:68:8a:e2:74:06:02:fb:82:c7:51:c1:f8:5c:64
Fingerprint (sha256): 5e:77:b7:58:3c:f0:25:d8:95:cb:61:81:1f:1d:40:ab:e6:1e:bd:42:19:5a:b4:98:53:15:2a:b0:e6:c7:5a:48

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 casystor.com

2

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for casystor.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

casystor.com
www.casystor.com

Other certificates including the domain name casystor.com

(limited to 100 certificates)

Certificate

The complete raw certificate details for casystor.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 368947805557480966115447489597492543869524
 . . . . . . . . [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 2018-11-22 00:03:19 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-02-20 00:03:19 +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 'casystor.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 1021045124823643650449747327663016331051050954220276620072180759165919110920505542484743627739336577004617748684458683156858518616913108841476029324156065556251403011217592738046140929621502618163792315710359410105036196443632660403758127611055445551797717932830091169155850837426935036437197444183339695162865149928970369468963744548061964417423550463559870840557915210189338593599217033970812298446054896027132985687756215660092793877931158621048390324024906097383298874760789901265797531305940574008410982870302158732113744930481607168410956285979171390649628475951425215135659386006309013168949620984542314774612578255637390995723961607665848787346974435675274934470526613808354348648068073416120020966892753889843756115304683884152910558288497577148565757243047451789408592772397186684823583790262020915663104880500869709679126415391925143349828503016668691626056160961121211396669425429917110801661399335742528190088003112515921977246763529254678272948299406501306327639199058652910621788982282882000989270577513648028543114458592856946274879084015237654899168848790950154964690046772424824852931967431120868715006151318559610726685373397512505791112195748343165018931365323976311779169627814289483933606082678785055665890631331
 . . . . . . . . . . . . . . . . . . . . [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)
							73f26d96aefe2fe8908ba83b295a5125c9020b59
 . . . . . . . . . . . . . . . . [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 (34 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'casystor.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.casystor.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 (245 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (242 bytes)
							00f0007600e2694bae26e8e94009e8861bb63b83d43ee7fe7488fba48f2893019dddf1dbfe0000016738f1545d0000040300473045022100ea5ffbb03fa7e4153b667723a37158e654fff43bf442ad928b742935e44a761302204f9b019782bb0177d79c24765e83959cee24ac3598546054c14f5305631323fc007600293c519654c83965baaa50fc5807d4b76fbf587a2972dca4c30cf4e54547f4780000016738f156470000040300473045022022bc28f4d337a49f596c0983819405df6d4330733e4523957c2f1167f89291a1022100a0e256c8ec259d4c5fc5f16b811526de16215d1067432b48918d41da203dd568
 . . . . [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)
		008fd5630e338984bcff1acbe414d1086088aa89d55a7d5493dd57375ae61c3ca35da1984b17657d161d885a4af96f67d3cbfa8ac5d7b8b30f498556696ab93a5ef6911abf62a494293694ab8b6cbedf9b43481f1698a50c649645ca026a715260e60bb6ad7c320893683b638ac0b79469f1aacab03647a7a94cb01eba88a86c9ca0bfe52724d42a1242d54c97126e45b52086a8af75ac7576a7e7fa5e46555e1ee69b835369d5daf0ed8e56b087c40b8e18e974c29c527ac7345478d1cf57e074fa64c8158897d88124f38ced757a90a839a2e0ee65634e6a47779b4d290bc0b878f5a66dfa8c2f1c7908b397384ebb1a0122604d686c1ecd32622fce11dc6bc7