apcal.hanu.edu.vn

Issued by R3

About this certificate

This digital certificate with serial number 04:ca:1c:4a:39:f1:10:a4:31:b4:8c:e9:3f:24:c6:17:34:83 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=apcal.hanu.edu.vn

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 04:ca:1c:4a:39:f1:10:a4:31:b4:8c:e9:3f:24:c6:17:34:83
Serial Number (int): 417223785634116550260584089721228095861891
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: a9:3c:30:aa:a5:8b:4c:5d:aa:f0:50:b9:f3:39:a2:cb:d9:2c:1e:2b
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 23:47:b5:03:c8:b6:0f:ec:b4:2f:59:85:21:02:b4:55:5c:59:6a:51
Fingerprint (sha256): 8c:5f:a4:5a:d8:59:c6:46:ac:b1:1d:7e:2c:1e:e3:b2:52:ab:c7:cc:e4:8e:5e:8f:d5:64:85:14:02:f5:19:36

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

Revocation information

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

Check the revocation status for certificate apcal.hanu.edu.vn

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for apcal.hanu.edu.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

apcal.hanu.edu.vn

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Certificate

The complete raw certificate details for apcal.hanu.edu.vn in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA1VHspVjx1sy/4COp44di
FtBjMM9ssTq4L5ySHpMoH7WWdfWJkJ0vEYcX/shUaqaa999SXK1C04sABmuTSPzJ
mFgYGsTlo5NpJLeR7zJPNWQ/5A2UVf6DKyQ9U4EcTVo7Fh22PVSBNQWt7qSQALSL
UExLLAzC2y0yIGOkCXEn2bI2crsWt7t7wrHAThOMN59F6lmDnbhGE2436lXyBECD
I+tntxd6MuvNCZofmc3ep30cvhAYrNo6DS9+nKp7EJWVq6aRPIgLRZWhjxlEoQl9
oB7vfQWHcLXthIxe23Bxr7DqiT948qBbAwdPQu/UTLzffe2WzayVNYp9kNH430K4
LQIDAQAB
-----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 417223785634116550260584089721228095861891
 . . . . . . . . [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 2024-01-04 06:29:13 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-04-03 06:29:12 +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 'apcal.hanu.edu.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 26929157384095099168889630771472930153106455508805621170925063179889229884590528336984974731259619572343187627036249975646076683722755011074681028771237592215858130977785163020874372285572525931942391579585724747246368225510209523495543976188362614691764934216436033649406565148875263858114714256663680361508784391091806779660692260261019929715920983981269206095948836859565811054928366515380099682877870655919802082423857727507443588174221640536817954469775444221132865150144681670642076762224633589531788217810713150946730649386593475902987564159429618412142172501061572885790210910750740562616144893849203812513837
 . . . . . . . . . . . . . . . . . . . . [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)
							a93c30aaa58b4c5daaf050b9f339a2cbd92c1e2b
 . . . . . . . . . . . . . . . . [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 (21 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'apcal.hanu.edu.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 (244 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (241 bytes)
							00ef00750048b0e36bdaa647340fe56a02fa9d30eb1c5201cb56dd2c81d9bbbfab39d884730000018cd36050ad00000403004630440220678a0e4e00fc99c6835431d241d6a74e865ed0bb70fe2e06f618577423a4e5c202204ec207848b569fa14882e19562e7547f83be60839128b5c79485bd3c956b716c007600a2e2bfd61ede2f2f07a0d64e6d37a7dc6543b0c6b52ea2dab78af89a6df517d80000018cd36050ad000004030047304502203d27cc3334ec7b4a0967271eb226ec4f5dd547e84070e4265ca3a4048a4806b30221008caf9fa65f6120b64101157f3f5b0a5d19267dcc778639946e9e8ebc5a9364ae
 . . . . [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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