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:61:2dSerial 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.orgCheck 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----- MIIGUzCCBTugAwIBAgISA4f2OF65NUzv0r6MZzBgT2EtMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xOTEyMDkxMzM2MjVaFw0y MDAzMDgxMzM2MjVaMBgxFjAUBgNVBAMTDXd3dy5zdHVkaS5vcmcwggIiMA0GCSqG SIb3DQEBAQUAA4ICDwAwggIKAoICAQCse0ja9MVplOQ1q+wZySMMaz0mAdRHtHQT JxuxG9YLmyGIihtkaQbphXDSpblGlzibFuxTqf6eZmqR/HI19Y6c4s7FE2a1rm1K iD90l7NJszgItFnS7FoPvYmBKfC1DeY3tIvlGunignM91//vu8Q+3+QdjvtfF/+I xQviBcPc/0/TF7fIvtSB1qLxlSzwrL7AvK7mzqfBoyw+nD1gNKJceJyrhAhRbfFz PEIRjux03H8t7mKkvXXWWRHgRjeW0QAMgEuM6UzlChJxt4p34mq4TKXj9gTWlRdu /5Ar6t2TvySRGhFhWD3XvbhLudCwuw6j27AknGIsR7Gt6IZN1jSZYtVXQ8FCKjN/ WMxbXEZo1Cc3bjQ05Qej59ablZMuRmDNbUlMc5Vqn9sbZ3hp68uE5713mlKFSiaT B83K3M8P1xineK89ZskKf4vQq7edF4lWdM1gatqcson/aRKRQHOQFJ25CLbuXccD KBhSliilLGToRj12prynocnPFfpgIDzPkgky23jM0g5VcDbkx/FMzwlX/ogtXmP3 k4JuEB3X7C/aAERWle2WlRqx8YvLpw/POGYbzskWJbjFMX3tlxj96hYOmDD/XB9v evSiAdehd7zcdK3xp3ue9J9k1i0zOPe+Zfsuxp+QDaTbgaMhOqEov+v8a6DaQDx2 c3WWMDXX3QIDAQABo4ICYzCCAl8wDgYDVR0PAQH/BAQDAgWgMB0GA1UdJQQWMBQG CCsGAQUFBwMBBggrBgEFBQcDAjAMBgNVHRMBAf8EAjAAMB0GA1UdDgQWBBQmuOf7 zH3We7olb00oQzsg1RVbeTAfBgNVHSMEGDAWgBSoSmpjBH3duubRObemRWXv86js oTBvBggrBgEFBQcBAQRjMGEwLgYIKwYBBQUHMAGGImh0dHA6Ly9vY3NwLmludC14 My5sZXRzZW5jcnlwdC5vcmcwLwYIKwYBBQUHMAKGI2h0dHA6Ly9jZXJ0LmludC14 My5sZXRzZW5jcnlwdC5vcmcvMBgGA1UdEQQRMA+CDXd3dy5zdHVkaS5vcmcwTAYD VR0gBEUwQzAIBgZngQwBAgEwNwYLKwYBBAGC3xMBAQEwKDAmBggrBgEFBQcCARYa aHR0cDovL2Nwcy5sZXRzZW5jcnlwdC5vcmcwggEFBgorBgEEAdZ5AgQCBIH2BIHz APEAdwDwlaRZ8gDRgkAQLS+TiI6tS/4dR+OZ4dA0prCoqo6ycwAAAW7rFwlSAAAE AwBIMEYCIQD0DuVLVT8PE4fJbm21BGyCLuukAM+BVG6VOzD629xBYQIhAIfQxfvJ qbcdLCPnvJeoLaDkkZmV7iY/aMu8wUi7V+V9AHYAB7dcG+V9aP/xsMYdIxXHuuZX fFeUt2ruvGE6GmnTohwAAAFu6xcJeAAABAMARzBFAiBkbD2anRWc62mXbEeKslDu TYe4luKpEaTgsHZ0yYpoIQIhANrBqGP9AozYJhfUlNMqas9Bpq1edUk2RM5tLy4s Sbu/MA0GCSqGSIb3DQEBCwUAA4IBAQA1z9XNyVjLiQFKaS3J6lWDZ0YSVQTDMFRP tc83nr7Y6VDrwOx0rDRLKm7mjlctd8DpxF8/ZkM0us8EvR9b5o995ooGq1x9kptk qctPoc+MoALKzCvp2yieuLe4OkvNENDJCZLVH4H0vKy3H0107XVZtZEJ+Yu+Qwj9 ZA8TtIhj/sPt/fVSXVuErVXqmpZZ+RO2QOi5wFwrSz/v4/co/DWeQnW3xwXYNvAD lCrC8jKgxOs79OlLd14bqrorNPDwY/+X5oTg+cEz9WciTdR4G4K8ZsacjZUftRj3 QXtEXAhNFpq7IQY+JZat6CcwZf5WcNiBxp1AGpIvPfmdNxs2Babo -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEArHtI2vTFaZTkNavsGckj DGs9JgHUR7R0EycbsRvWC5shiIobZGkG6YVw0qW5Rpc4mxbsU6n+nmZqkfxyNfWO nOLOxRNmta5tSog/dJezSbM4CLRZ0uxaD72JgSnwtQ3mN7SL5Rrp4oJzPdf/77vE Pt/kHY77Xxf/iMUL4gXD3P9P0xe3yL7Ugdai8ZUs8Ky+wLyu5s6nwaMsPpw9YDSi XHicq4QIUW3xczxCEY7sdNx/Le5ipL111lkR4EY3ltEADIBLjOlM5QoScbeKd+Jq uEyl4/YE1pUXbv+QK+rdk78kkRoRYVg91724S7nQsLsOo9uwJJxiLEexreiGTdY0 mWLVV0PBQiozf1jMW1xGaNQnN240NOUHo+fWm5WTLkZgzW1JTHOVap/bG2d4aevL hOe9d5pShUomkwfNytzPD9cYp3ivPWbJCn+L0Ku3nReJVnTNYGranLKJ/2kSkUBz kBSduQi27l3HAygYUpYopSxk6EY9dqa8p6HJzxX6YCA8z5IJMtt4zNIOVXA25Mfx TM8JV/6ILV5j95OCbhAd1+wv2gBEVpXtlpUasfGLy6cPzzhmG87JFiW4xTF97ZcY /eoWDpgw/1wfb3r0ogHXoXe83HSt8ad7nvSfZNYtMzj3vmX7LsafkA2k24GjITqh KL/r/Gug2kA8dnN1ljA1190CAwEAAQ== -----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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