www.studi.org

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:e0:ff:89:84:9f:7b:2e:05:6d:0e:b7:09:d4:ad:7f:51:56 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.studi.org

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:e0:ff:89:84:9f:7b:2e:05:6d:0e:b7:09:d4:ad:7f:51:56
Serial Number (int): 337899775159079196388851031250917383950678
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: aa:c5:6e:2d:90:a1:74:6d:61:2d:b7:58:e3:2e:27:cc:ef:7b:c0:0d
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 26:80:ec:d0:ef:98:95:19:55:bf:b4:b7:bf:91:16:4e:eb:58:45:d9
Fingerprint (sha256): 8d:46:3f:4f:22:7e:04:e2:08:ec:d7:a3:75:e0:48:f4:2e:08:72:c7:be:0e:be:cb:98:4f:f9:09:6b:bf:f5:55

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.studi.org

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for www.studi.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.studi.org

Other certificates including the domain name studi.org

(limited to 100 certificates)

Certificate

The complete raw certificate details for www.studi.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 337899775159079196388851031250917383950678
 . . . . . . . . [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 2020-02-11 06:45:27 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-05-11 06:45:27 +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.studi.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 931177829212403598661531267208200811098053018813295659787728612419464648477355727528919269672004054574843777534370333581408664036524042304703262235720658766023900511821260253342929195717917498405499444439903217971123008954740989488750605276901624632978778280336190684155460952086627942923771810275250168166473637282672115383531025943433756558911088747021806563994609255718730275618327872561883945227878995743074523559909553074024671918276468739176253413247417436064930166013684584386789757029082337574700444953448745727377543436318584545536245074613459079954977545990348021377968685015398077870629907316260844053791221878897059575197192459949660200138096415936416096909428872263092497746354910946899388076313447465897948695461822438842296764553490247773181152972679849807055616070010316606392281767009033631991634158005661021598125211514551703455822024180970337933965253579516222525442083660081261213157998395131446647487210209893894696601335851532835166814757984795087884512803389666388726071068644243408512357968724218829479456838028290035540813173732734282425493000346366999851546926719091297890828310918101079513910418138752336897295239931219340640278342705982575171182483681398112207665056146699088648462023074044586398717701519
 . . . . . . . . . . . . . . . . . . . . [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)
							aac56e2d90a1746d612db758e32e27ccef7bc00d
 . . . . . . . . . . . . . . . . [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 'www.studi.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)
							00f000760007b75c1be57d68fff1b0c61d2315c7bae6577c5794b76aeebc613a1a69d3a21c000001703335c7a30000040300473045022059458345086381a9f01a1fd4cc7011b366f9cac2c6bb5702209b108ee7ead0b8022100bf3265a3efb8200da8b835f505fd03ca974bfdcb8706c5cd626b0736eb3b362f007600f095a459f200d18240102d2f93888ead4bfe1d47e399e1d034a6b0a8aa8eb273000001703335c9590000040300473045022036b68d877ee44628d8df1063b1ba9226dace8e94e928b61137431c9486b8f1a8022100c16333ce5995b70a405f62fc77a0e69d2deb741059ecf069c8aeb263237670ca
 . . . . [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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