duel.tech

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:00:19:aa:88:90:eb:4d:25:44:16:3a:26:8e:7d:0f:df:a1 was issued on by Let's Encrypt.

With 2 subject alternative names this certificate can be used to secure multiple fqdn's. 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=duel.tech

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:00:19:aa:88:90:eb:4d:25:44:16:3a:26:8e:7d:0f:df:a1
Serial Number (int): 261370973955530697496652052654574273552289
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 35:8e:73:5f:3d:20:97:99:33:91:78:43:85:bb:48:bd:f7:3a:dd:c2
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 44:17:93:01:15:f3:1a:0b:30:29:df:fe:9e:46:3e:45:f0:91:57:31
Fingerprint (sha256): 99:9c:fe:b3:9f:01:4f:0b:57:a7:7e:16:01:2f:ec:9c:8b:8d:8f:ee:6d:b5:8f:47:0c:e3:26:f4:d9:26:1f:f8

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 duel.tech

2

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for duel.tech

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

duel.tech
www.duel.tech

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Certificate

The complete raw certificate details for duel.tech in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAuUjr9BmCegwOtM0VreQt
MFG2LlrSm44T1kMqIUClHhu3OWYBm+C4Mvk2SVbDBAZNGd9zawP8D6HoAo9bZLYW
Fem0Imh/rThqECWOTKcqOoMz54D1Php49/DHTiJbF5gIVqJ2iaapG8yFJcdo8v4v
YJMTcXI84j8Ko4moWvlZzzGZZA2wG39d2Ler4hDpsMsFht4VQQzyxiQwaSAq3TdO
TMocFLdqXw24JPzj5FTwPhxSAecjNEjkNkYY7NoeRMmIe9yFS2A3egDBCjyJObg3
fGe7JOMw/iS4ZUHk/kpeR5uhATXXtl2VJH9pfzxFoNk0z6iuGM5gXhqcvejq+QR7
cQIDAQAB
-----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 261370973955530697496652052654574273552289
 . . . . . . . . [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 2019-03-23 21:45:04 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-06-21 21:45:04 +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 'duel.tech'
 . . . . . . . . [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 23390045445955093267117502517085579536406479246301224094983703239948478994275770233348371987008806450993450447614574736732718729058549343320756987764824524616436360902245775083454998743629427381989354488829686924998457765675694749552450466317080680950398534221218025544445324818596910740724405122491556352712531252696928305597222618126757510046291852951152201744558278875459540998821029113110876454086840442425742388129720919129499647584872512982940681333636913476752343589666439023295806338773061116745663828191698769433655880448484218587495388222798433943721184316341559519356394313290728133607042996768209325292401
 . . . . . . . . . . . . . . . . . . . . [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)
							358e735f3d2097993391784385bb48bdf73addc2
 . . . . . . . . . . . . . . . . [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 (28 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'duel.tech'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.duel.tech'
 . . . . . . . . . . . . . . . . [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 (245 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (242 bytes)
							00f0007600747eda8331ad331091219cce254f4270c2bffd5e422008c6373579e6107bcc5600000169acba9d870000040300473045022100be25ffa3b43eb5d4739cc8b0352b5cbd1b8bc06fa5461f9cce2c2a3797b96bdb02202b2a966ebcca755deae078936777a578b1bf4d52b0ddd6b8c059aa1b6378e5c600760063f2dbcde83bcc2ccf0b728427576b33a48d61778fbd75a638b1c768544bd88d00000169acba9dfc0000040300473045022100fa225dea217af2e9a27afd8d5edcbaa855a111179c82f162f9a40c13d6fe9d3502202a33d8d776070433c7790eeea20785e3f5d9b77b2e7b2bc496d442a1a68d3c72
 . . . . [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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