studyo.fi

Issued by R3

About this certificate

This digital certificate with serial number 04:f4:f8:42:a0:63:5f:5f:a2:0c:0f:2a:1c:d9:30:21:19:40 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:
  • DV certificate contains a subject common name, this is not recommended. If certificate policy 2.23.140.1.2.1 (CA/B BR domain validated) is included, only country and/or common name is allowed in SubjectDN. (BRs: 7.1.2.7.2)
  • Subscriber certificates use of Subject Key Identifier is NOT RECOMMENDED (BRs v2: 7.1.2.7.6)
  • Subscriber Certificate: commonName is NOT RECOMMENDED. (BRs: 7.1.2.7.1)

Certificate Subject

CN=studyo.fi

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 04:f4:f8:42:a0:63:5f:5f:a2:0c:0f:2a:1c:d9:30:21:19:40
Serial Number (int): 431808035743355935468973781683156625201472
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: af:10:34:23:8d:a8:96:86:17:f3:a0:80:38:df:c6:d1:e5:bb:ca:24
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): e4:4d:45:69:be:76:55:fe:6c:ac:a6:5f:82:d5:65:c3:c8:d3:bd:c8
Fingerprint (sha256): 4a:0a:10:a1:d4:b5:1a:a0:99:fb:fd:88:c6:af:99:44:11:52:a0:cb:c6:a4:fa:ca:ba:bf:90:01:80:73:2c:4f

Issuing Certificate URL: http://r3.i.lencr.org/

Revocation information

OCSP Server: http://r3.o.lencr.org

Check the revocation status for certificate studyo.fi

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for studyo.fi

Public Key Algorithm

RSA

Key Size

2048

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

studyo.fi

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Certificate

The complete raw certificate details for studyo.fi in PEM and ASN.1 format.

Certificate (PEM)

-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAudovlqqIFW9QiZ+YLOND
2quXcTkAHgG8m7fzj3+HVdsPhK/gSy+XhVHCYIuYfcnw5CWosTRY8CBew92RjluU
J26pw+eCcvFw7uz2nD8RGE2u4aG0BZQ1pGZ2mXaWqstbE13Ar7PtK9ctmuMGorZE
/5soQicc/IzBuCXAWUVSrTSoYXz9t6cBdrTLjrJ9nu+Zw2VIbSPviyfbaH9Grdxd
EZAWzGTb+mP/Il4N2C6ZeAFAYrf+WthJApKLqEWA2w+NmCyCKv9LS97AzuTNOCGL
ujM9R+MTpYoZM7NRblx5xtptjAUTA/f/dJf8HzzR9ONYjVm0Ntdq+5uKmDZ6i/jO
cwIDAQAB
-----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 431808035743355935468973781683156625201472
 . . . . . . . . [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 'R3'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2023-11-26 12:13:47 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-02-24 12:13:46 +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 'studyo.fi'
 . . . . . . . . [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 (2160 bits)
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 23461677892416545051980473431644268222077714971144339039099036183033356494597440418141038241209064030277081059000301905337566863211130344154055571924284437318963043274350497945381407976577825927717865482440280029314714423751486454063934576534562968957337239987394216157162071525610296172140253568752158218574172211240830862847525886843732073882800617706001717534259903385608705297284352784493450605707206975117730095331548327575942823069264420643866847791863954656631075936426493645403675648038154027320317881374633670063504517885721783029364510110519800255338037591161422620959610692711977104674672595768951531163251
 . . . . . . . . . . . . . . . . . . . . [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)
							af1034238da8968617f3a08038dfc6d1e5bbca24
 . . . . . . . . . . . . . . . . [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 142eb317b75856cbae500940e61faf9d8b14c2c6
 . . . . . . . . . . . . . . . . [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 (73 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://r3.o.lencr.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://r3.i.lencr.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 (13 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'studyo.fi'
 . . . . . . . . . . . . . . . . [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 (12 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 1.3.6.1.4.1.11129.2.4.2
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (245 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (242 bytes)
							00f000750048b0e36bdaa647340fe56a02fa9d30eb1c5201cb56dd2c81d9bbbfab39d884730000018c0bc3c27a000004030046304402203d35502f5b445c5a8dc2bcec98e52f1319187898cc1f1d850bd241398403855b022058b6ebd3f334bd28fe2a5d9bb02d378cc8455c28836e75adb76257794f5d002500770076ff883f0ab6fb9551c261ccf587ba34b4a4cdbb29dc68420a9fe6674c5a3a740000018c0bc3c2ca0000040300483046022100ee99f5fb8654316d3ada14a7addcce3061725025155e579f19556eb2639d9f08022100a5aff42c8da12caadf80522e876abab2b4dfbd5a0ffc78f3c4cd55cf04aff934
 . . . . [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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