www.studi.org

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:87:f6:38:5e:b9:35:4c:ef:d2:be:8c:67:30:60:4f:61:2d 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): 03:87:f6:38:5e:b9:35:4c:ef:d2:be:8c:67:30:60:4f:61:2d
Serial Number (int): 307602260106414808287320685185962668417325
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 26:b8:e7:fb:cc:7d:d6:7b:ba:25:6f:4d:28:43:3b:20:d5:15:5b:79
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): c6:c0:75:67:fc:dc:b5:c5:39:c0:81:2f:e3:1a:48:dc:26:1f:d9:44
Fingerprint (sha256): 91:07:d4:de:12:65:6f:98:71:3f:e5:df:f5:53:99:db:22:36:8d:7d:7f:5a:aa:b8:d1:a6:81:f1:1a:9c:be:01

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 307602260106414808287320685185962668417325
 . . . . . . . . [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 2019-12-09 13:36:25 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-03-08 13:36:25 +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 703663456458734992905997928209915878465074423723334650859127197742067726943828913948461342989230361412592112229912905002125281155956744207175062237964199120428622395195937199704977512058483460872595006944181918823749788322564146173034675369735817715637779740150499477402184316081680192290661638642414251407755763949345006990120936359560712192202179515850535269676991931420358785620007301694812327390841395812444417431623875051899457498289844444076782479052519086654625958169469240464784574920399681494494605442364463320931434391160140343244081690738018813243183909699009409382909849656751772839248534604030967371772913896546895466708152805964900297630062837831844103174247257318359072280396912289931316484596254848186515435228048852472665968749717637704722352015836248383331485851873456778142210921149474036855019816665250471636412276134293075398459866913539887392672064471657414740735485487376386202911921037890416194656821922122398862676697772001293149587730734096549356624311966524579811767004750513733527726253119682009819394966387851126585049357442857729690333605297847423572928670821920698186984170629837723698460958381773177907953008038187476039399511423702121047334886128501537302924027495936942194424600050976778692785985501
 . . . . . . . . . . . . . . . . . . . . [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)
							26b8e7fbcc7dd67bba256f4d28433b20d5155b79
 . . . . . . . . . . . . . . . . [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 (246 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (243 bytes)
							00f1007700f095a459f200d18240102d2f93888ead4bfe1d47e399e1d034a6b0a8aa8eb2730000016eeb1709520000040300483046022100f40ee54b553f0f1387c96e6db5046c822eeba400cf81546e953b30fadbdc416102210087d0c5fbc9a9b71d2c23e7bc97a82da0e4919995ee263f68cbbcc148bb57e57d00760007b75c1be57d68fff1b0c61d2315c7bae6577c5794b76aeebc613a1a69d3a21c0000016eeb17097800000403004730450220646c3d9a9d159ceb69976c478ab250ee4d87b896e2a911a4e0b07674c98a6821022100dac1a863fd028cd82617d494d32a6acf41a6ad5e75493644ce6d2f2e2c49bbbf
 . . . . [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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