www.studi.org

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:0f:16:14:15:41:e3:08:5d:74:cb:05:28:ca:4d:c5:3d:b8 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): 03:0f:16:14:15:41:e3:08:5d:74:cb:05:28:ca:4d:c5:3d:b8
Serial Number (int): 266470440592089951187661569441675067342264
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: fe:0e:6f:57:06:d7:f4:25:ee:57:2a:15:9f:21:f7:8b:dc:41:77:13
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 56:b7:25:19:6d:56:2d:dc:34:57:e0:23:31:c1:c1:e0:e7:28:8e:82
Fingerprint (sha256): 1d:1b:50:d4:4f:98:53:14:da:94:f5:e9:78:da:a2:fd:90:26:ca:68:c1:1e:a2:75:69:06:5c:36:d2:35:ab:21

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 266470440592089951187661569441675067342264
 . . . . . . . . [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 2019-10-08 20:22:08 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-01-06 20:22:08 +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 792439845505025186325811654690131716670689394713961093194942498164951693514623393534764904740447978161792463503831812806334982784477561481544661578549648578274183859700618995425360375996506660340749711117683295833312410753738368426305136126867963851451007533817671680744806246758586123140818030417711983515504696149579565839628804569613715051767297565457436068327047040368237552522233741379769024857013806758304994695419760360537446946736249976003693943173635741960810151390954174119543639579217629483639883236482991364857214703879961571180231618195468559349478236362377664865087572395343825364082384792636190236039334912427297466139037987700306472911298560450681187335253741384974500909970266961483434021318342027264737990647037594428474870706186872690752178911018809542738637474036577264061663004115607283630771824245772015163792165555966797848574186969131512911929796179007444686364349113896986812229853890607085270495323185299038459527912540889149411627190669187384166266541752096180668270396268062497841528709704737746356665414803463169908483654860503472785131100700504125382830408117718914289933329311480088161738514570504473016957120376954191235761695609186471130197704593356251672607866139936051661378047554662265421456659861
 . . . . . . . . . . . . . . . . . . . . [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)
							fe0e6f5706d7f425ee572a159f21f78bdc417713
 . . . . . . . . . . . . . . . . [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)
							00f0007500293c519654c83965baaa50fc5807d4b76fbf587a2972dca4c30cf4e54547f4780000016dad40307e00000403004630440220178e549c0bc25f06ed627ee03afbff4830b231312cc2805d35d2efa3073640e302203df435220c0323de1a27930c25103e88800e0103ecd13fc30422fb9ab0505d2a0077006f5376ac31f03119d89900a45115ff77151c11d902c10029068db2089a37d9130000016dad4030ac0000040300483046022100a7dd8fbc2e94910d3f467178c32204c1a38e22aac91e57ec1cfe5a44c2d3aebb022100ed9d7113129a98fce1c1de0102e8eee075e50549af49604757513d118a1135fc
 . . . . [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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