acheckin.vn

Issued by R3

About this certificate

This digital certificate with serial number 03:a7:c8:e3:cf:e5:2c:a1:13:f8:cb:8a:b4:ad:5d:78:4f:e6 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=acheckin.vn

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:a7:c8:e3:cf:e5:2c:a1:13:f8:cb:8a:b4:ad:5d:78:4f:e6
Serial Number (int): 318431041538237183162173526426346082291686
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 17:2c:b3:a6:94:5c:3b:09:1b:c4:4e:a6:1d:6a:d3:2a:05:d5:6f:2e
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): f5:b9:73:dc:f4:7c:79:40:0c:34:90:b2:37:02:20:da:43:5c:58:35
Fingerprint (sha256): 1c:36:6d:e5:44:89:d0:1f:82:f1:95:d6:e8:59:72:4b:4c:7a:34:64:9e:46:37:52:30:78:db:91:03:c8:b7:9f

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

Revocation information

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

Check the revocation status for certificate acheckin.vn

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for acheckin.vn

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

acheckin.vn

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Certificate

The complete raw certificate details for acheckin.vn in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAyJ8HQmS1RKHWPXty/P/D
r+blRab/unzvGCqiekvTyzPJ1Loqr8avDYfuMDSnioYNBg6sBdiq6vpe9BviFYTj
cuISrEdQdK3psKVzPND4aMrQ+ubYX4B25I3i/KEjbuUvRtR/Op+3cRvxFNcGdcno
nYWmkViK/ukAp37jB2UtVvCH4jAvsNHVRTUS9vJgwABn61cPOLrcBE2+3b8NE3LV
LMb0pG5Df6Bs58tNtu6LQ4DFHHFIP0cbeuer+3RC6yLZcyl88s+19ZdUt80OdNr6
VDeNl/kb3cWjAo4RutBrFTtwC0hhd3YLMgTw+42w1TkIFOt3W/o6ILnFA5uoZP6g
2QIDAQAB
-----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 318431041538237183162173526426346082291686
 . . . . . . . . [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 2024-02-22 23:58:47 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-05-22 23:58:46 +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 'acheckin.vn'
 . . . . . . . . [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 25326080798712128965040122685209776076876224708750822314589498859440158210054285586244595582765908643343319873170752814828702054201062110776183301499842715120737129465979626801170655619001246590209598223637673107832630368857767468940996791113972915946362024716407918356936767090486731314620648848396943084612097396053025511589296845933946166210840629828952264733667981433424807810676047817338449223707052058679153813702852858002895891648291951611040883670267995078903723246639658445492363127550594082960316084751875187856316843412510505024739972855094477413843894884391814917252449091880239334625667225593123279118553
 . . . . . . . . . . . . . . . . . . . . [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)
							172cb3a6945c3b091bc44ea61d6ad32a05d56f2e
 . . . . . . . . . . . . . . . . [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 (15 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'acheckin.vn'
 . . . . . . . . . . . . . . . . [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)
							00f000760048b0e36bdaa647340fe56a02fa9d30eb1c5201cb56dd2c81d9bbbfab39d884730000018dd378d4b9000004030047304502201424b88e4c47e808190050beed74f0f3a0a2a12f0bae35353893b965aa7cf9d30221008e8df044d203baa9e0e00eb1ee2527831ea18e5e13bfc7665f37af6b5ba822f2007600a2e2bfd61ede2f2f07a0d64e6d37a7dc6543b0c6b52ea2dab78af89a6df517d80000018dd378d6cb0000040300473045022100c3ec7da395862241a57bf7a19f84a5b316f4504d1ac3280bcd647ea691aa23f6022016fa564877635ffe12a5db6418282e048d672b1a0e8f3d9408cc987b63180e9c
 . . . . [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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