www.studi.org

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:c5:e9:0e:23:6b:1b:57:24:fd:5b:4d:f3:fb:06:55:a0:3d 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:c5:e9:0e:23:6b:1b:57:24:fd:5b:4d:f3:fb:06:55:a0:3d
Serial Number (int): 328682267612249733091454913210752890675261
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: b0:7c:64:cd:fe:70:14:35:4f:09:9b:6b:28:de:97:da:41:bf:0a:b5
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 13:41:61:23:fe:24:f4:4c:f4:84:f2:c0:e5:cc:3e:83:55:1b:d4:fc
Fingerprint (sha256): 41:7c:09:87:65:01:c5:da:f3:a2:b5:d7:ce:e6:39:f7:23:62:73:f4:78:09:d2:7e:1d:df:43:1b:30:83:9e:50

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-----
MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAnYtpzPnrwYVwYLbQWd6g
X31XTutK1JVC3zxasj7U21lAZMirM+MXBpHfYN3qOSUvFVvvML7E3r7LGcvp4EVE
UPT//BIysEQ1JAWdDnArMgy4pqiQh9ExO+c8yHy44TB7hvlkbqVODPBednxNaC59
x7nudFgTMGYaRtSJ6FkNmyx0SM9GnxdRMr67XJ1g+AoNHe8v2xzLir3W0yRPZfxj
PdUZghfiTozaSCJtvOho1zFfD7xFIJORrTUrUWQkkv1YLUE1aFBhPF6vWkHhN0Hc
8EJGQdD/WNb7VvIhfN3Q3ERhHeC0yh1f3EPaBrME69VqvPc24mmVruIXGICn4dZg
W1I+56H8rx3y+W8eDZI9vPAStYSFeP/rto1YcHfgRHNAjHQ1OdqLfOczHgVXlOJN
X0kHy2Ux+V69XcMypPmc2VU6Iy7HKl1FlM5uJgXrAgHRSPAkNIsqbOi6tVvg+q1e
OhCgyoZBXE3oQM0VEVns1pBM+bZ7b/IAHAvoXus8AUpE5hewRBVAnDFiEouLMylI
6t7shZEIGI2h5X5D8BTVfBPPJoK2pi4cLX5ouZkD1bbOCXh8JZQFG2uZzMgQdm0G
7D7z6OFWo2ZxVvonRLAWFj9K//zHhHmNhCtuis+SfzgDakKb6JNQuuOdY5SMtj/r
kUohJ9RjEJ1WvpNsumEV6AkCAwEAAQ==
-----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 328682267612249733091454913210752890675261
 . . . . . . . . [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 2019-05-25 16:46:30 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-08-23 16:46:30 +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 642725824057389022431835114872769725681418156724718964769920995192615951006321331824427532062427658502143552626551420658397893077290193533984143450532712609936834632895136306778797122840332354301822372697221710220121399108382153148886727459151361844337473187279337481656881089296510600663321794142389512837079504864409846548760835237470111976026985935964275668446251312674806922559767139104197731294347627245469268633485459956058974585239854619142504575504409681377419473896692081738596901416876625461964930495038386893291449208297554980147527158834757003215239566365633438356247158845860813724517803715418758889910130895426468180005895739607252808909662749483504146974255830148049525330343631063428154379870218353072410018369212557333085516815259443880717616356458808699444200454815636483930168186676980364231810400819972553364625352976516513387731392843118963200766504410010961500977838781685028308671397003403693976030433786314749840638912148957609389954230095992137891543929233641168297140050009222670796580372451264451542333837855961005920064412686217330759742113824632655892282019732099598599173691418681698849618883829413916488700099160872458499685123002088917298640309793240644196564456979234998519494897257465504076496496649
 . . . . . . . . . . . . . . . . . . . . [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)
							b07c64cdfe7014354f099b6b28de97da41bf0ab5
 . . . . . . . . . . . . . . . . [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)
							00f0007500747eda8331ad331091219cce254f4270c2bffd5e422008c6373579e6107bcc560000016af019e84d000004030046304402200b3536b39b4c5b2b05df3fa7a41bc21817b350e7ce5836854c307d12c2f5e81d02202ada1ccf56670a43ed158b14e6e3f68bea9b7c8a4498123b1b346336b822a2ca00770063f2dbcde83bcc2ccf0b728427576b33a48d61778fbd75a638b1c768544bd88d0000016af019e83b0000040300483046022100c99f73de67a2741fa246757e4fd3f01ca6d9199fb017083660d2306e249845fe022100b2daacc7abdf036e320e385a2fd9dafc210f03dd36e87301004a5f79ec3360b4
 . . . . [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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