singyin.edu.hk

Issued by E1

About this certificate

This digital certificate with serial number 04:df:e8:5d:3d:d4:a7:7d:d5:31:84:03:da:4d:a3:ab:c8:9b 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:
  • Subscriber Certificate: commonName is deprecated. (BRs: 7.1.4.2.2)

Certificate Subject

CN=singyin.edu.hk

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 04:df:e8:5d:3d:d4:a7:7d:d5:31:84:03:da:4d:a3:ab:c8:9b
Serial Number (int): 424640976583115400555232287925007268169883
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: 69:fb:c1:c3:bc:92:31:e0:9d:c3:5c:fd:ff:e9:5f:81:4b:9e:af:f2
AuthorityKeyId: 5a:f3:ed:2b:fc:36:c2:37:79:b9:52:30:ea:54:6f:cf:55:cb:2e:ac

Fingerprint (sha1): 68:13:29:39:6f:84:bf:f2:73:bb:aa:46:90:1c:4b:ea:4a:b4:fc:cc
Fingerprint (sha256): 2f:8a:00:2d:dc:4d:9d:08:5a:07:40:9b:3e:9c:70:2c:a2:de:1f:3c:aa:31:e2:0f:f9:c7:b3:90:e3:cd:a4:65

Issuing Certificate URL: http://e1.i.lencr.org/

Revocation information

OCSP Server: http://e1.o.lencr.org

Check the revocation status for certificate singyin.edu.hk

2

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for singyin.edu.hk

Public Key Algorithm

ECDSA

Key Size

256

Signature Algorithm

ECDSA with SHA384

Key Usage

Digital Signature

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

notion.singyin.edu.hk
singyin.edu.hk

Other certificates including the domain name singyin.edu.hk

(limited to 100 certificates)
sni57747.cloudflaressl.com
sni57747.cloudflaressl.com
sign.oakslab.com
sni57747.cloudflaressl.com
sni57747.cloudflaressl.com
sni57747.cloudflaressl.com
sni57747.cloudflaressl.com
sni57747.cloudflaressl.com
xn--jt9h.fm
sni57747.cloudflaressl.com
sni57747.cloudflaressl.com
o365.singyin.edu.hk
sni57747.cloudflaressl.com
sni57747.cloudflaressl.com
sni57747.cloudflaressl.com
www.mrae.ir
backend.tendercuts.in
sni57747.cloudflaressl.com
sni57747.cloudflaressl.com
editor.vev.dev
sni57747.cloudflaressl.com
sni57747.cloudflaressl.com
syaa.singyin.edu.hk
sni57747.cloudflaressl.com
o365.singyin.edu.hk
sni57747.cloudflaressl.com
sni57747.cloudflaressl.com
bathingpanda.com
o365.singyin.edu.hk
singyin.edu.hk
sni57747.cloudflaressl.com
sni57747.cloudflaressl.com
o365.singyin.edu.hk
sni57747.cloudflaressl.com
o365.singyin.edu.hk
sni57747.cloudflaressl.com
sni57747.cloudflaressl.com
o365.singyin.edu.hk
sni57747.cloudflaressl.com
sni57747.cloudflaressl.com
sni57747.cloudflaressl.com
sni57747.cloudflaressl.com
sni57747.cloudflaressl.com
sni57747.cloudflaressl.com
student.singyin.edu.hk
verifyemail.everythingjournal.app
gustaf.flowup.cz
sni57747.cloudflaressl.com
sni57747.cloudflaressl.com
sni57747.cloudflaressl.com
student.singyin.edu.hk
sni57747.cloudflaressl.com
sni57747.cloudflaressl.com
loginhelper.singyin.edu.hk
sni57747.cloudflaressl.com
sni57747.cloudflaressl.com
sni57747.cloudflaressl.com
sni57747.cloudflaressl.com
sni57747.cloudflaressl.com
o365.singyin.edu.hk
sni57747.cloudflaressl.com
sni57747.cloudflaressl.com
sni57747.cloudflaressl.com
sni57747.cloudflaressl.com
sni57747.cloudflaressl.com
singyin.edu.hk
sni57747.cloudflaressl.com
laaricoin.com
xn--jt9h.fm
sni57747.cloudflaressl.com
sni57747.cloudflaressl.com
sni57747.cloudflaressl.com
sni57747.cloudflaressl.com
sni57747.cloudflaressl.com
sni57747.cloudflaressl.com
singyin.edu.hk
notion.singyin.edu.hk
sni57747.cloudflaressl.com
singyin.edu.hk
admin.dheoab.dev
syaa.singyin.edu.hk
sy50.singyin.edu.hk
sni57747.cloudflaressl.com
sni57747.cloudflaressl.com
sni57747.cloudflaressl.com
sni57747.cloudflaressl.com
sni57747.cloudflaressl.com
sni57747.cloudflaressl.com
o365.singyin.edu.hk
www.santaterezinhaalimentos.com.br
sni57747.cloudflaressl.com
sni57747.cloudflaressl.com
sni57747.cloudflaressl.com
sni57747.cloudflaressl.com
sni57747.cloudflaressl.com
att.singyin.edu.hk
o365.singyin.edu.hk
www.pastlife-test.com
syaa.singyin.edu.hk
sni57747.cloudflaressl.com

Certificate

The complete raw certificate details for singyin.edu.hk in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEmP1/QEcE4V09xYjRH+ZEcMz00LOU
eMAnWLz+W2X/uMFIJbsXVJ66IaI6mWjerf4tdkCBXoTwprFUEfOEBtLRdg==
-----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 424640976583115400555232287925007268169883
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.10045.4.3.3 (ecdsaWithSHA384)
 . . . . . . . . [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 'E1'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2023-08-02 03:40:00 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2023-10-31 03:39:59 +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 'singyin.edu.hk'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.10045.2.1 (ecPublicKey)
 . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.10045.3.1.7 (prime256v1)
 . . . . . . . . . . . . [c:0|t:3|false] BIT STRING (520 bits)
				000498fd7f404704e15d3dc588d11fe64470ccf4d0b39478c02758bcfe5b65ffb8c14825bb17549eba21a23a9968deadfe2d7640815e84f0a6b15411f38406d2d176
 . . . . . . . . [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 (1 bits)
							0780
 . . . . . . . . . . . . . . . . [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)
							69fbc1c3bc9231e09dc35cfdffe95f814b9eaff2
 . . . . . . . . . . . . . . . . [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 5af3ed2bfc36c23779b95230ea546fcf55cb2eac
 . . . . . . . . . . . . . . . . [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://e1.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://e1.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 (41 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'notion.singyin.edu.hk'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'singyin.edu.hk'
 . . . . . . . . . . . . . . . . [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)
							00ef007500b73efb24df9c4dba75f239c5ba58f46c5dfc42cf7a9f35c49e1d098125edb49900000189b48baf930000040300463044022067bbd476d57af995f8541a7377405803ae8a7b5c3414b9a5fb3962414d5da6da0220767d9bcaa759763b2beae06bdf6b008f533b1bb0a770ad2c319c285be2dd19310076007a328c54d8b72db620ea38e0521ee98416703213854d3bd22bc13a57a352eb5200000189b48baf9b000004030047304502203bf4670fc17a536c460f153bb56182af6dc249d465273bd234d4835a7c27883f022100bc810595d9cd5d1df2c38d1f6963762075e5a3018066249ca0062b1eac9cc93c
 . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.10045.4.3.3 (ecdsaWithSHA384)
 . . . . [c:0|t:3|false] BIT STRING (832 bits)
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:2|false] INTEGER 34549979897034336677077087832328156916412314786413820544007310314049778583750536103161070163115269008208014126859910
 . . . . . . . . . . . . [c:0|t:2|false] INTEGER 34329869433915370316398012979649437365183911040384897105683523608914601466577500785164131527313233229465523036590031