ai4eu.dei.uc.pt

Issued by R3

About this certificate

This digital certificate with serial number 03:44:a1:a1:95:b5:a2:69:60:eb:6c:0e:09:f9:20:dc:6d:a1 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=ai4eu.dei.uc.pt

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:44:a1:a1:95:b5:a2:69:60:eb:6c:0e:09:f9:20:dc:6d:a1
Serial Number (int): 284690903449489743343839687253920078130593
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 88:f3:8b:42:76:3c:06:cd:d3:7b:c2:06:d2:11:ad:6a:bc:a8:5f:d0
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 53:85:db:b2:72:92:98:41:80:83:d6:7f:c3:53:64:f2:48:e9:90:59
Fingerprint (sha256): 01:81:a8:55:e7:2f:9a:31:3c:09:5d:83:8f:a4:12:7b:31:fc:b7:f6:c0:3e:45:6c:4d:a2:c7:a5:3f:17:d0:e3

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

Revocation information

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

Check the revocation status for certificate ai4eu.dei.uc.pt

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for ai4eu.dei.uc.pt

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

ai4eu.dei.uc.pt

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Certificate

The complete raw certificate details for ai4eu.dei.uc.pt in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAwsBq0Iax4dKWFFCq4YFU
48qYNxBLCot4bRc7ajBA2WCkooee8d1WnwZ+vnFm70AKEtuqcggTndgrZDDkt4EF
8dNn/dRZMDLbrm0cxXW7lqi3ZxEYaTYqoSKuFCEVDsrMiC0lbnlqtMEroOQarJmV
lyidrRJEJQKLapuWCuIzzRA6mu+KnvX018n7oYPS2b3zJmTyzfZHHgOO+elfyhu7
RKroWEVG++SmXyUn6mQXGL/vEUu1XrrPZinAZmiT020mVBgKOK2flNQpcmdx8Fhc
GrwksxadXvr5YfVKdZE2z8EUJeyWyNVhzXwTrHKAHjeZ0RQdXNHsM34aRS/LsMzi
qwIDAQAB
-----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 284690903449489743343839687253920078130593
 . . . . . . . . [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 2024-01-01 07:57:14 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-03-31 07:57:13 +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 'ai4eu.dei.uc.pt'
 . . . . . . . . [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 24585115643000577893549751005908618540465204454238750950797719151688300812268834874036132516577740700888259130742899410701028445204254280942249189834989610518100663178237158365230292841112694773863115945199710027975645864635120951700761573517416337920418475474731964340461997489805007004763778373292984548132651215204600038909317619743068709687969178192132659541684239269233405498172170513187118723979752277864975842539810084003363988878981018107673432255903393851787830450781413148215888581027002332507140191174767919928431459809502022698684540254534326849930149976026327316114631829714188158740746171995238718825131
 . . . . . . . . . . . . . . . . . . . . [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)
							88f38b42763c06cdd37bc206d211ad6abca85fd0
 . . . . . . . . . . . . . . . . [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 (19 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'ai4eu.dei.uc.pt'
 . . . . . . . . . . . . . . . . [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 (244 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (241 bytes)
							00ef00760048b0e36bdaa647340fe56a02fa9d30eb1c5201cb56dd2c81d9bbbfab39d884730000018cc43dd06e0000040300473045022100cf6cbae0204b02da2f46795a1e6d8e95394d32987f9ffb170d8b49626c94568d022050315ba93fb5372112fc96d33ee7f27706250543ad77b0ee7d23b591baf29d27007500a2e2bfd61ede2f2f07a0d64e6d37a7dc6543b0c6b52ea2dab78af89a6df517d80000018cc43dd0880000040300463044022075d8beb2c711aabcbf8a9742620ac77cee6189a66bea17f4e3969b80fa83c78802206cf67c8d0da3d3108a97d056b96802b34f55b4fa26caccb1d3af35f92ec1ba36
 . . . . [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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