www.studi.org

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:c6:9a:07:44:a1:cd:c3:12:41:07:eb:3b:a6:bf:57:7a:c7 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:c6:9a:07:44:a1:cd:c3:12:41:07:eb:3b:a6:bf:57:7a:c7
Serial Number (int): 328917505295078709960701010224406769138375
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 06:c6:ef:79:ed:37:09:69:43:62:2a:31:92:02:17:75:7d:98:e4:bf
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): ee:5c:79:df:f7:2a:09:b9:97:8c:da:bb:c9:7f:d9:2e:32:bf:3d:fc
Fingerprint (sha256): 04:64:c4:29:d3:33:de:69:27:b6:66:76:98:7d:95:78:7e:0a:52:71:a1:eb:45:cf:d2:bc:0c:60:3c:4c:bd:1f

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 328917505295078709960701010224406769138375
 . . . . . . . . [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 2019-08-03 04:36:37 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-11-01 04:36:37 +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 808133743118524085200699707528972186274104034632464914584703285594636828257898592965972488725408653006327548220906959799679368345827552847072375983068102307016281377981139551813597514632336768249105817088002586146875956815804434749113593112130883890647061236368653003496267170123493244938194053386289350769682064254115525521056926487278314825543054854774186330461000715292830160929703353243550388547047820528632387532453160125820608400245953612349396634813607942002479911754226434306046714515622861579845817560666885979929532350477204190640218841815858956187507672003418361245613159609899670115951127567575902200324821897887141830079249995812117155049454587202411830110458065488591511034642776676545815560103454817032443569720201873744706881860827960424432904729472933925990311021646541121167830778825787073827366078970738181753074702831392413897318908801596624225867113922802984231912579384302375117316050940818773544520549922236056411309872990028811774938036176621037020307006347058722359620417689954883956728640943480299262848284281655210053608350090145611091176778496770247151775944083517931706863488242598292882227685125708904611342423461563300848438465265078108393549787688902480073322883097551651166001079167880517999610810539
 . . . . . . . . . . . . . . . . . . . . [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)
							06c6ef79ed37096943622a31920217757d98e4bf
 . . . . . . . . . . . . . . . . [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)
							00f0007600e2694bae26e8e94009e8861bb63b83d43ee7fe7488fba48f2893019dddf1dbfe0000016c55fad4f00000040300473045022100b235f8ddf5d2d9b3d17a553be738cb7034cf890f8796ff1abfc438d66bc054af0220563b1c2d24686516c37ac619cdbd2ef454f3904d3403ec934ad4dcb3cd733849007600293c519654c83965baaa50fc5807d4b76fbf587a2972dca4c30cf4e54547f4780000016c55fad50c00000403004730450220209234c9d35f56c18da7a140c29f6cd0932903bb303cd5c59265f52399f5d38d022100af7c805f3d96f748ebe02d4ad8b58317e5ccb44459ce248a2a873b71f49413c6
 . . . . [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)
		003c0e05d054d9c31ed20e47d7d546770f941755045aa437bd3c87361c1608d4deab2f21ad79c3014c6071e5d583ba51409ede462b4959bc77f7e9ccab6bcae438232db748a2fd669ec4892028743d7257b255efdacba2bd10d350d74e3c52eaabb619bab87d8c38bfe1d5ec6bcac5e3050adfcaa53eda2029543c8bf752d440e505c205892979c0969dbf9ec9692ea05a516341ad147be01fbd803078515557efe3b2ce0971e32d83d86d8026aefd5f3af4ca3a62a9e93edf5cc780bb25a59fa39af065f38e627554d7ff9280405da8ab69c53a23a7ff25093dd4d3c1f867820d21d0c176f3d9272995ea2a1a4a239983b2154e747aca80b49158b98a93926f53