it-support.phongvu.vn
Issued by R3
About this certificate
This digital certificate with serial number 04:99:8c:fc:bb:38:c2:e9:e0:8a:77:d0:6a:f1:d7:fb:28:38 was issued on by Let's Encrypt.
This certificate is currently not expired, we haven't checked the revocation status of this certificate but you can do this simply on revocationcheck.com. 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=it-support.phongvu.vn
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate will expire on
Certificate Details
Serial Number (hex): 04:99:8c:fc:bb:38:c2:e9:e0:8a:77:d0:6a:f1:d7:fb:28:38Serial Number (int): 400699750041470506310807695319055220811832
Serial Number lenght: 139 bits, 18 octets
SubjectKeyId: 2d:28:ea:ba:fb:3e:c0:84:07:b9:c3:44:6f:fc:34:1a:dd:b0:b9:51
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6
Fingerprint (sha1): 30:8c:c4:d2:84:a5:65:1d:d1:21:90:2c:f8:60:38:b6:85:c4:32:f4
Fingerprint (sha256): 5a:a1:f2:20:8a:6b:02:f7:93:f6:6f:20:9d:12:7a:27:2d:7a:86:dd:be:59:75:f9:4f:9e:c9:5e:c0:8c:c9:7b
Issuing Certificate URL: http://r3.i.lencr.org/
Revocation information
OCSP Server: http://r3.o.lencr.orgCheck the revocation status for certificate it-support.phongvu.vn
1
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for it-support.phongvu.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
it-support.phongvu.vn
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Certificate
The complete raw certificate details for it-support.phongvu.vn in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIEBDCCAuygAwIBAgISBJmM/Ls4wunginfQavHX+yg4MA0GCSqGSIb3DQEBCwUA MDIxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MQswCQYDVQQD EwJSMzAeFw0yNDA0MDIxMjMxMzhaFw0yNDA3MDExMjMxMzdaMCAxHjAcBgNVBAMT FWl0LXN1cHBvcnQucGhvbmd2dS52bjCCASIwDQYJKoZIhvcNAQEBBQADggEPADCC AQoCggEBAKOHd15oSjPfbiP3bqZgHXeE58qEryfMSK8QA0IFMThvb5jzybIg7kGK LXPqozosr2JftZBDaTEK53B7GVjPtv/SzVPBbs16s/5GitgfPzmgG6rhsG8f+Kf6 /DlUNYUg7c/ymQoqneNZMhnU1zrzaahrWN8YU8eryUWntup3md6M1cc79gLSlf3r sH4IKqSZ2o/jj1RX2Fo5Kq/l0TYfcd5nqKAqfTnUmaWI+OXDZvXgYNu9bkO3T+fm GWDWBtum28sJykvejdNAIcMKDhZGQnc7sUx4HhpGCjydDeJxw5IPLwDCUjxdoHm5 Fzma+8X++SEIJHvVA8eSg9zjZIfnaCsCAwEAAaOCASQwggEgMA4GA1UdDwEB/wQE AwIFoDAdBgNVHSUEFjAUBggrBgEFBQcDAQYIKwYBBQUHAwIwDAYDVR0TAQH/BAIw ADAdBgNVHQ4EFgQULSjquvs+wIQHucNEb/w0Gt2wuVEwHwYDVR0jBBgwFoAUFC6z F7dYVsuuUAlA5h+vnYsUwsYwVQYIKwYBBQUHAQEESTBHMCEGCCsGAQUFBzABhhVo dHRwOi8vcjMuby5sZW5jci5vcmcwIgYIKwYBBQUHMAKGFmh0dHA6Ly9yMy5pLmxl bmNyLm9yZy8wIAYDVR0RBBkwF4IVaXQtc3VwcG9ydC5waG9uZ3Z1LnZuMBMGA1Ud IAQMMAowCAYGZ4EMAQIBMBMGCisGAQQB1nkCBAMBAf8EAgUAMA0GCSqGSIb3DQEB CwUAA4IBAQBIK+PQ4b2/pO9BZASvPf5kXzoUFjg7+0TuaNNadclTxINWNbObItvI Y6Y3RMNjZTLMXxPoa/cBCslPviPlsEpaxqoUHvSjjqOlgoJ6G44WobONK2EZEKLI LZfIe8iftMrKRv58Ywf9M9IYcaoQ6dlBjEkjBir7ZWK1VdpqZqJrZ/0p1fPW5Rns aTDtU/nRvrpd9eB6oCy0n+wBvsZHWJ2QmpMFipT8xpVyfinOXAWYc5Oxuq0JDF7m K0C98yGM7pqP/ugGmCSJQ7AZQMLP86up+d+EMIsK5xCceOBuvXlo2kX3/oqhBjLu tVG7i0kFldYJ89ofegpHDkNGWLld6ozM -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAo4d3XmhKM99uI/dupmAd d4TnyoSvJ8xIrxADQgUxOG9vmPPJsiDuQYotc+qjOiyvYl+1kENpMQrncHsZWM+2 /9LNU8FuzXqz/kaK2B8/OaAbquGwbx/4p/r8OVQ1hSDtz/KZCiqd41kyGdTXOvNp qGtY3xhTx6vJRae26neZ3ozVxzv2AtKV/euwfggqpJnaj+OPVFfYWjkqr+XRNh9x 3meooCp9OdSZpYj45cNm9eBg271uQ7dP5+YZYNYG26bbywnKS96N00AhwwoOFkZC dzuxTHgeGkYKPJ0N4nHDkg8vAMJSPF2gebkXOZr7xf75IQgke9UDx5KD3ONkh+do KwIDAQAB -----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 400699750041470506310807695319055220811832 . . . . . . . . [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 2024-04-02 12:31:38 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-07-01 12:31:37 +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 'it-support.phongvu.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 20643644623956282580100904225997623438285389512829839892882536676402885914623327614785917860235049008311346059441747592764722846526110036604907508404075985465085589024712681464469779584439957742942951450994904213796098158995631925198278207490128231272225798261110535213714442456323366730723910066043508718436390474999073486316876709624500668126612707721290850591475922637849505380195847877984731544091183542058112856516201307699499930835773882283598018378287097480851529086841727560979337133063408004600129637700390454447769336958369125969693889930955993732668599740857051389289588556208252024751455806308256997402667 . . . . . . . . . . . . . . . . . . . . [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) 2d28eabafb3ec08407b9c3446ffc341addb0b951 . . . . . . . . . . . . . . . . [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 (25 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'it-support.phongvu.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 1.3.6.1.4.1.11129.2.4.3 (CT Precertificate Poison) . . . . . . . . . . . . . . . . . . . . [c:0|t:1|false] BOOLEAN true . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (2 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:5|false] NULL . . . . [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) 00482be3d0e1bdbfa4ef416404af3dfe645f3a1416383bfb44ee68d35a75c953c4835635b39b22dbc863a63744c3636532cc5f13e86bf7010ac94fbe23e5b04a5ac6aa141ef4a38ea3a582827a1b8e16a1b38d2b611910a2c82d97c87bc89fb4caca46fe7c6307fd33d21871aa10e9d9418c4923062afb6562b555da6a66a26b67fd29d5f3d6e519ec6930ed53f9d1beba5df5e07aa02cb49fec01bec647589d909a93058a94fcc695727e29ce5c05987393b1baad090c5ee62b40bdf3218cee9a8ffee80698248943b01940c2cff3aba9f9df84308b0ae7109c78e06ebd7968da45f7fe8aa10632eeb551bb8b490595d609f3da1f7a0a470e434658b95dea8ccc