link-estamp.redso.com.hk

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:9f:6c:f8:1b:f2:5d:dc:1d:9f:ec:f4:da:ad:39:37:ce:c1 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:
  • Subscriber Certificate: commonName is deprecated. (BRs: 7.1.4.2.2)

Certificate Subject

CN=link-estamp.redso.com.hk

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:9f:6c:f8:1b:f2:5d:dc:1d:9f:ec:f4:da:ad:39:37:ce:c1
Serial Number (int): 315586599015702966018613254092336638971585
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: b0:c6:ce:d0:f6:0b:33:a4:17:6c:a9:43:9a:a1:7b:99:2b:0d:02:2f
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): cd:45:b4:ad:37:b4:23:ee:1c:f4:40:ec:5a:f5:af:a6:64:d4:d0:df
Fingerprint (sha256): 29:c9:26:94:c1:fa:6b:f8:55:b4:f6:ac:a2:dd:5a:f2:4f:57:bb:c9:5d:04:d7:e8:bd:da:14:8e:55:c1:69:71

Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/

Revocation information

OCSP Server: http://ocsp.int-x3.letsencrypt.org

Check the revocation status for certificate link-estamp.redso.com.hk

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for link-estamp.redso.com.hk

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

link-estamp.redso.com.hk

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Certificate

The complete raw certificate details for link-estamp.redso.com.hk in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAuKw+OiefJCOn+Mm+CmxJ
feVtqFIb3dC646LiimDHPi45zoihWNfONeUU86+vn7zxpoXdCXkSyJdsNlsv6IZc
YMNrnLd4HXKG+oI95dylsnSDb7DzQA5XghlGpxNJVa3q2HQTKSMm0DKky8ZoPsCA
OZQanzRVMDYs2fnKD/kMR8odsA17eSfPxrPYg4FYLakOQJMpPM7PFdKfQmHmL9xd
fZJpbAvXjI6d0mAfS8zLqOCMMgYPgjeZ1JtU0mqOW/jIuiVVpGRGvLCmw2zve09C
x2m/K6yzhUh9OJmB6B1JF6e9esRnh9GuM7q3e8cSNOZ1wqVkuhuHIlis0ThGZ+uv
rwIDAQAB
-----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 315586599015702966018613254092336638971585
 . . . . . . . . [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 'Let's Encrypt Authority X3'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-02-16 08:05:52 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-05-17 08:05:52 +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 'link-estamp.redso.com.hk'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.113549.1.1.1 (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 23312784339590362377712669410973099815134200417078683157120325040330721993275958516446832179200297398075350752626385145221028925014268743889564310341339638929385582487956411683799162488774312741086310008019132470476653057353131118214184426934620757844578464128846146191748419834512212594569772648025735097370650054705992049736621048402075787906025084797708163848248627705045414231447451932262133176794415426639272180592481025394893356133389474883704027472364942289855839987677060908827436454225218736348652679994243098133321567342796784005708540850288748445204135367390098750998553544289881473406722958512310113251247
 . . . . . . . . . . . . . . . . . . . . [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)
							b0c6ced0f60b33a4176ca9439aa17b992b0d022f
 . . . . . . . . . . . . . . . . [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 a84a6a63047dddbae6d139b7a64565eff3a8eca1
 . . . . . . . . . . . . . . . . [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 (99 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://ocsp.int-x3.letsencrypt.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://cert.int-x3.letsencrypt.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 (28 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'link-estamp.redso.com.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 (69 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 1.3.6.1.4.1.44947.1.1.1
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.2.1 (cps)
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:22|false] IA5String 'http://cps.letsencrypt.org'
 . . . . . . . . . . . . . . . . [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 (247 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (244 bytes)
							00f2007700747eda8331ad331091219cce254f4270c2bffd5e422008c6373579e6107bcc5600000168f58e06750000040300483046022100fca914e53fa7d238cba11709373acb25425db7f3d9c0104453b94bfd63348ac7022100b8658d6484f277ca0b0fd6853b37ac39acad713fbf7935339f2b93f6d4edc4c5007700293c519654c83965baaa50fc5807d4b76fbf587a2972dca4c30cf4e54547f47800000168f58e067b0000040300483046022100cdabef17616730ce8b18e296edddbc933d86c0a945c8c8089c82fd12afd647f60221008525f092d58b156040e3e1cb2f3915f4e9d1578d94bf99beb909e6bd81dd8698
 . . . . [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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