DV SSL/TLS Certificate for www.tayau.vn

Certificate is witin its validity period

Issued by Let's Encrypt (R10)

About the www.tayau.vn DV SSL/TLS Certificate

This certificate with serial number 06:9c:8d:5b:65:90:44:09:5b:56:eb:54:84:67:a4:dc:98:03 for www.tayau.vn was issued on by Let's Encrypt.

With 2 subject alternative names, this certificate can be used to secure multiple FQDNs. This DV SSL/TLS Certificate is currently within its validity period but we haven't checked the revocation status of this certificate, you can do this simply on revocationcheck.com. We have found some issues with the compliance of this certificate, they are be shown below. We hope this DV SSL/TLS Certificate review for www.tayau.vn provides you with the detailed information you were looking for.


We have identified some issues with this certificate:
  • 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)

Let's Encrypt

Organization: Let's Encrypt
Country: US

This X.509 certificate will expire on

Certificate Details

Serial Number (hex): 06:9c:8d:5b:65:90:44:09:5b:56:eb:54:84:67:a4:dc:98:03
Serial Number (int): 575945660536600961650635201529250242664451
Serial Number Length: 139 bits, 18 octets

Subject Key Identifier: 86:d8:dc:19:d9:af:d5:6a:20:68:a7:7e:41:b8:f6:14:a3:b7:40:ac
Authority Key Identifier: bb:bc:c3:47:a5:e4:bc:a9:c6:c3:a4:72:0c:10:8d:a2:35:e1:c8:e8

Fingerprint (SHA-1): 47:39:0b:ac:b3:f2:e6:c5:6c:2c:94:56:53:9e:91:92:e8:61:09:42
Fingerprint (SHA-256): 3d:34:1a:81:b1:01:4b:19:50:db:a1:99:0c:95:81:18:9a:c5:e2:2c:d5:ce:13:bc:7f:7d:8b:af:ee:3f:9b:27

Issuing Certificate URL: http://r10.i.lencr.org/

Revocation Information

CRL Distribution Point: http://r10.c.lencr.org/4.crl

Check the revocation status for certificate www.tayau.vn
2
DNS Names
0
Email Addresses
0
IP Addresses

Advanced Certificate Properties

Technical details of the X.509 certificate for www.tayau.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
10
CA Certificate
This is not a CA certificate

Subject Alternative Names

X.509 Certificate

The complete raw X.509 certificate details for www.tayau.vn in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAs5nQny+2JFBcBJwnFqtM
DqoPXP8zEX3LexweFCj8K37OV0DDwZDatC77Dh1e9i2EfocbaDXidQ+93ERaVUSN
uIKzer4s+pEF8u+jYR/c5ynRUrqewRK420Nons37fBvta6b+tjBDi42Fl2VXjk6T
yb3rmsnkW/A7pNpwIH5w1kzdvn5I1eSwzPcXuqn4JmXi60rJkfBN9j7q+33vzEBM
3tip3xPABlt2do8J9E+QQHBwj+0+qIPCTMww54Iy7Ja/7O+cVEEBhBnb9Qgq6wxJ
hx5TcIbmW0FjlnXXoLNAU1MsN9XE+jK0iZv5ijaXpSQzO9bpnODo2+WAbYCaAUSA
KQIDAQAB
-----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 575945660536600961650635201529250242664451
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.113549.1.1.11
 . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'R10'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2025-07-02 09:30:13 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2025-09-30 09:30:12 +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
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'www.tayau.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
 . . . . . . . . . . . . . . . . [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 22672505557339863684463215731595250825133817296216100159898315449014578920512224385030535775042642624706096201687523406384850111643268126551632460064441176239379998510851357998425569155337325172427382771114811583469002993102781978436600070805753273233020881945790966983014132131378545121112079223328091691733762038380012870875797991930680704400778211247381594663308869246919175666012161504477636290518209177525631280072327868737767999083681150214329551281298755452365103025922363307322625896456987710916344139243582753648508761056869850253049102853495052486466257007571608455856798110940205396175622910601426674941993
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.3.2
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.19
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (22 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (20 bytes)
							86d8dc19d9afd56a2068a77e41b8f614a3b740ac
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.35
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (24 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|false] OtherName bbbcc347a5e4bca9c6c3a4720c108da235e1c8e8
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.1.1
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (39 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.48.2
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://r10.i.lencr.org/'
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.17
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (26 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'tayau.vn'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.tayau.vn'
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.32
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.31
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (38 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|true] OtherName 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|true] OtherName 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://r10.c.lencr.org/4.crl'
 . . . . . . . . . . . . . . . . [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 (246 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (243 bytes)
							00f1007700ccfb0f6a85710965fe959b53cee9b27c22e9855c0d978db6a97e54c0fe4c0db000000197caae810e000004030048304602210081b7ddd1134d3c2b2d7f3837e44b9332fac854ee2af9f4259525673f52ab811a022100b1c185cffbac4de849881960c1fbfd5147117bf1a1becba66019140ab92eff4f00760012f14e34bd53724c840619c38f3f7a13f8e7b56287889c6d300584ebe586263a00000197caae81150000040300473045022100a1e74d35762e8c7699455ed048c49ce4c83d13dd22829aad37fc0fe75641bd500220793842255d023cfa0aa41026704c33d2aaa71eb945e97f5237185ff7b7bbf448
 . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.113549.1.1.11
 . . . . . . . . [c:0|t:5|false] NULL []
 . . . . [c:0|t:3|false] BIT STRING (2048 bits)
		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