www.yuyusystem.com

Issued by R3

About this certificate

This digital certificate with serial number 04:d9:87:5c:07:6a:7e:31:de:b1:6e:07:13:dc:6e:ad:91:c8 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:
  • 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=www.yuyusystem.com

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 04:d9:87:5c:07:6a:7e:31:de:b1:6e:07:13:dc:6e:ad:91:c8
Serial Number (int): 422470340970040689857346451155274093662664
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: 5b:64:cd:8d:f6:18:f9:64:d0:0d:da:f5:cf:00:3e:57:83:bf:a1:36
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 3b:d1:86:3e:91:21:f5:e3:7e:96:13:3f:94:fd:33:e9:2a:1e:3d:10
Fingerprint (sha256): de:b2:bd:85:6a:90:f9:68:39:37:f6:a5:61:30:ec:e7:6d:a4:1a:f9:4a:ba:f6:59:f6:cf:21:17:b2:6e:99:e9

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

Revocation information

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

Check the revocation status for certificate www.yuyusystem.com

2

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for www.yuyusystem.com

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

www.yuyusystem.com
yuyusystem.com

Other certificates including the domain name yuyusystem.com

(limited to 100 certificates)
testiapp.indoors.fi
dorseywelding.com
www.ubique.dev
app.yuyusystem.com
neatwithnat.com
www.isasc.net
www.effekt-raad.dk
www.kaptain.art
getalvira.com
www.yuyusystem.com
www.yuyusystem.com
shalitha.com

Certificate

The complete raw certificate details for www.yuyusystem.com in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAvrckuZ+RvjpNqlTp5c5a
6RefGZxjiqylWDrpFyvwQ2bxfNFlWom5sa9vvRtZ566l6DAkfyNZdmd75Xs7ADRu
BA1lbbkaaMkCcez4w39gaGL2yGNjOi6A+MFCeM/vnZuyIQsyHqXOcJC2+c+/abUl
XwsaJizWE6IEyZAwb6erPc67UrY8mvGgclG6FGQxiFbvXzC2nXjj7rMarx4PUZzH
Hf7WOPzbhSFYhveDRoh4bGoat8tVZU/T+th2cWtxmYFDCBZHqI+JdBGPDVDtCaoj
/iusR+hiiT8w58uLJ2McPZYIFqtZGxjh9NKNvvjWpvMt3strIz7fREPNOwoC8geK
tQIDAQAB
-----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 422470340970040689857346451155274093662664
 . . . . . . . . [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 2024-01-08 04:24:55 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-04-07 04:24:54 +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 'www.yuyusystem.com'
 . . . . . . . . [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 24075589348340843679835720624552818841382422723217746663119429407007606706696866509809710876193037282550139468992162267358803786231560384336310576943925103327854165420677121695860556313140489831188074156129013467500246893445270151766049327179526664349297428792610057874470909540732753697398540156256153812943340488532712573516886514635369659054901178621600021536098881677174993698774190942471818871826513667081767375067832208432316741309095228255288933945924175232081314631579164406137398276317853169968820101762146057713670605991074091180335360600457864824204637239544108490491754711245156570227150041554389945518773
 . . . . . . . . . . . . . . . . . . . . [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)
							5b64cd8df618f964d00ddaf5cf003e5783bfa136
 . . . . . . . . . . . . . . . . [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 (38 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.yuyusystem.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'yuyusystem.com'
 . . . . . . . . . . . . . . . . [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)
							00ef00760048b0e36bdaa647340fe56a02fa9d30eb1c5201cb56dd2c81d9bbbfab39d884730000018ce787f34c0000040300473045022057ee494d5858db3bce343bb5a01d65aa86dd30672cbe2a8c89974fd89333dfb0022100cf33ae6809c1505551eb7547ef1d6ba25961fc388a402b4a5a3d1af9ddccaa2700750076ff883f0ab6fb9551c261ccf587ba34b4a4cdbb29dc68420a9fe6674c5a3a740000018ce787f39e000004030046304402200a30e0f40cc120b7c335ea50a809b8f2a6f30a503751370f5bce5b0ffeb84fc9022047682724e3f397b96dc5dc0fd3a99a6375d67a85dfaac99b638eee4f04c1d3a0
 . . . . [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)
		00365c2544b2d57b8dda304148a42afe71ba5d9875e15f15598cec36b3818be53cccb741c1449cad6f35f52cf72d71faf591f3c4d81dfb9a37a6022ca59c07fd6607298784c05af65487d42a8f3338059fc36ea57fc96895eb2ef6d8c31818226ae7b147d9a1eee02515adfe8de804919ba23c85d90a926d262c19150d8d73aeba883d0a0bb6b8bacbda62519a2dde9a87802ca0983c4131e6362aeace0a88183ce30bf197188c010eeb7acb343abefef67a9f5c1f22b122dffb72ac1ed46a68cc76848ec3e1aa3ce81d353207b0d0d0a281bd1a9b75b0643e32bb8318ef381c7afb11c634b08a65b6eb8755244260b3a27ad21260ddf735d7ab1593e51a728c8a