www.tecnologiaenergetica.com

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:1b:e8:10:10:26:79:e8:27:76:c7:0d:69:d2:38:49:ee:94 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.tecnologiaenergetica.com

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:1b:e8:10:10:26:79:e8:27:76:c7:0d:69:d2:38:49:ee:94
Serial Number (int): 270832946001484867670449209462530700340884
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: a0:3b:24:fb:64:d4:84:a6:18:20:0a:d2:4d:db:eb:7a:88:a1:07:82
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 6d:ff:41:b2:3e:d5:76:69:36:4d:91:fe:19:98:70:5a:a9:2b:37:54
Fingerprint (sha256): 91:1c:c1:c3:52:20:0a:d0:b9:d7:c9:94:40:81:96:5d:6c:37:13:ad:62:e6:9f:d5:f4:48:62:fc:71:5a:81:2d

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.tecnologiaenergetica.com

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for www.tecnologiaenergetica.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

www.tecnologiaenergetica.com

Other certificates including the domain name tecnologiaenergetica.com

(limited to 100 certificates)

Certificate

The complete raw certificate details for www.tecnologiaenergetica.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 270832946001484867670449209462530700340884
 . . . . . . . . [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 2019-06-26 03:03:03 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-09-24 03:03:03 +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.tecnologiaenergetica.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 701873092283837184074025407806197280207871345273326902626546080515551986532689346956138545084243646422444069769387931350521418404099211708508126407440873822350209603531751323307046759559177048009752239756789096346301376749606174562872091038291266434750731845408471659067985198266411564655568062625353672143658932858318577841872365397456125126963058739571168232079297904510004848155372121335405328790896859999003615231009889253919423540220440162716576046446908646237198944232259660755845776532931565831799372046000537740696953366569500548316048313845576525782532750688645053772203842570211494210378778268182768451605117451216908307815998768422791588066460007623582443927929552936352032236747828004070480001299795559611785294538363500580329899519738709504723350042645942156464202188017794444679715565165763752230759143339687711269077118124514860491847581985161869359391334447191488415320781955870216390976110635592190817508519732361645462848625078127959892611436207984881117801732786939707957242584609853226491326027921114851816938677968490427992019801228283972700837136792931248071949994249585662391739330566074394758791735735171787886489354237986033675118780853668648366835699394550451371011517105058036602970222442188649874838198033
 . . . . . . . . . . . . . . . . . . . . [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)
							a03b24fb64d484a618200ad24ddbeb7a88a10782
 . . . . . . . . . . . . . . . . [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 (32 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.tecnologiaenergetica.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 (244 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (241 bytes)
							00ef007600747eda8331ad331091219cce254f4270c2bffd5e422008c6373579e6107bcc560000016b91f3812d00000403004730450220178dcfce64a04e66bf5e3d4b542039d7c6893e88d2b05470968600bd1aff62aa022100d6084d43fff1aa8206a53da2d3016b149ea008b8a60218caf0052ce170c1adec00750063f2dbcde83bcc2ccf0b728427576b33a48d61778fbd75a638b1c768544bd88d0000016b91f3814c00000403004630440220730c63a5e8025d8391f2d531a7b90e2f826402df85f9794a97bcb6e1b0e5052502203e98c35d78fbfcf4d6eadbef7d3b13f398728aa4f9912c8294c4a3134fcc9d6f
 . . . . [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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