searchepedia.com

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 04:7a:5e:ad:34:79:ea:64:e0:7e:17:2f:4c:ed:87:54:cf:ab 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=searchepedia.com

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 04:7a:5e:ad:34:79:ea:64:e0:7e:17:2f:4c:ed:87:54:cf:ab
Serial Number (int): 390089439254700236245389049414070402600875
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: a5:b1:6b:99:b2:87:27:9d:f4:6e:7b:90:f4:06:95:17:d9:ae:1d:26
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): bd:7a:73:50:9e:95:15:40:c5:23:2f:03:66:96:cf:4a:4a:ca:d6:cf
Fingerprint (sha256): ba:fa:57:a2:21:68:80:56:af:39:c3:ab:4f:09:23:99:59:4e:48:08:b2:2e:44:64:3a:42:50:da:e0:aa:9b:ad

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 searchepedia.com

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for searchepedia.com

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

searchepedia.com

Other certificates including the domain name searchepedia.com

(limited to 100 certificates)
searchepedia.com
www.searchepedia.com
portaldosolimoveis.com
searchepedia.com
searchepedia.com
searchepedia.com

Certificate

The complete raw certificate details for searchepedia.com 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 390089439254700236245389049414070402600875
 . . . . . . . . [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 2018-12-15 02:14:40 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-03-15 02:14:40 +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 'searchepedia.com'
 . . . . . . . . [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 754242155532695330245065056908480690085994851708064909618238307143964777071144087363471832609753764630976343763514596183448423817018611040999231625342502829351959858619014701482639546766392692421031892908074132555165655079858347053891479884716281070594359028330033808571136259379689019703000035699297929721601049734335111380369933080238617728685865571476581673464081509824786703750254700401640442846031916776145727128879460520168220668718106875498157793361932963607621603514980586694924262609951069906159134290705134392541874311345830835452789615216925408974119923677902981980059603427234128527164254781584802356774699565485637119504757063132074851122033463654503807824623962795110533477924399518693379693991351365769246392165002641068623628480541713433012440990808118541012754066151449343491597057297307414329986928383261993700283438149085408519505371453967932399038912823750515148501403030455599053423312713597021469542567361617275552306997059997456337645861899338959576169692801110112235303805386327393065577034929186014398539596299793521143043928447958966243545490603544978721895364203223427632285659624806078088984126613723127870191377067021292419557621611859862072235112216488579301570306128591961391095875164092325545989921163
 . . . . . . . . . . . . . . . . . . . . [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)
							a5b16b99b287279df46e7b90f4069517d9ae1d26
 . . . . . . . . . . . . . . . . [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 (20 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'searchepedia.com'
 . . . . . . . . . . . . . . . . [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 (247 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (244 bytes)
							00f2007700293c519654c83965baaa50fc5807d4b76fbf587a2972dca4c30cf4e54547f47800000167afdbda5a0000040300483046022100e5dbf87c09b8806c16b9ec015c25bd916c1a0394a749af09d515760d3ac03e9b022100e982774c3a11091c6c2660b59de811244721adc2fa1e546b8aa2567e03e19ec10077005581d4c2169036014aea0b9b573c53f0c0e43878702508172fa3aa1d0713d30c00000167afdbdc110000040300483046022100db8e83761866bbefb72e1f70e11e8d2cb3b4af642e50f50b537edb69bd0ee50c0221008ab227e264a907e5c6da7ff3a9b7d63ab5b09565061802b3a686d7b82dcd401a
 . . . . [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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