www.goldenstrain.com

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:78:d7:ce:83:8b:78:c4:22:57:44:c0:cb:f3:06:af:ba:b0 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=www.goldenstrain.com

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:78:d7:ce:83:8b:78:c4:22:57:44:c0:cb:f3:06:af:ba:b0
Serial Number (int): 302457598126085718623303502873587434371760
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 58:1d:a5:99:16:f2:6e:80:98:12:b0:f7:19:18:b6:ea:81:ec:d6:e6
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 69:d8:1f:b5:8c:cc:1d:a7:d3:7a:0b:14:3a:e7:0e:61:8b:ef:39:7f
Fingerprint (sha256): f0:a7:71:d2:be:94:06:ae:30:f3:85:a3:a2:a2:e3:bf:4e:a6:43:d2:c9:1b:4a:d1:9c:0e:be:a1:bd:56:c6:bd

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 www.goldenstrain.com

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for www.goldenstrain.com

Public Key Algorithm

RSA

Key Size

4096

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.goldenstrain.com

Other certificates including the domain name goldenstrain.com

(limited to 100 certificates)

Certificate

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

Certificate (PEM)

-----BEGIN CERTIFICATE-----
MIIGYDCCBUigAwIBAgISA3jXzoOLeMQiV0TAy/MGr7qwMA0GCSqGSIb3DQEBCwUA
MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD
ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xOTA5MDIxMjMyMzNaFw0x
OTEyMDExMjMyMzNaMB8xHTAbBgNVBAMTFHd3dy5nb2xkZW5zdHJhaW4uY29tMIIC
IjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAwnB8zHebfHSvZez2VfpkSNRc
QIupaC0zMKlVeuxc0vWPIpZV08lTdcBc1VgRpTvjnB6SvJGMTS9FTL/mCBtJa5iH
cnqTQrdvAGibBWopBDpWYIgFNOb+Xmlw0k/EhFOj1rOGmUZBVE1mrFn7qrTIm/SJ
ewb7fh5sCubYnHbCberANAAJVhHn5nC5Kt7XsyL2Ag5Nak74L/9dziB5Ofyu1UjO
8FHla7fAkTVkqp2C1s2qWJxtl7xGVucuPf6e/xp+C/fR0xQDhvxKVKRta1YpTUuo
Im6lNDqWDwF571gqRurbjVfj9TYgHKX6UqZr/2fxZsC6Clzza0yi1gIGpAZ3g7LM
+3Yz8DKDiAlbWMs7vfjnW62MKBoFYU3duFrvJEADZGu7J4KLQVJtjT28IsU83tKA
AA7DQCoKqQ5rnsAo2baS3Fw2c1S3owdVdtvXtdNN+4uJ81IRileh1MJR4kkY31To
NyrNgvyl/CA9vvhcZxFMFWwurw1pSkoGQlOJFnOgQDxxXS1HiuPQcjWDBk9gKS3e
QgqsKtbjYxwBSg6xUSjP6R24JgkVWNjC+s/wdS37+qD+ZmVsjjYsu8y/3R4tVq9p
I7Pj25HPk35jLdmRppCoZEpoocSZpSeT+hiSei4kiGCrwzgPmA38GFoW5HWp9Pxo
IOwsZ6aJYcTBvyuu5ckCAwEAAaOCAmkwggJlMA4GA1UdDwEB/wQEAwIFoDAdBgNV
HSUEFjAUBggrBgEFBQcDAQYIKwYBBQUHAwIwDAYDVR0TAQH/BAIwADAdBgNVHQ4E
FgQUWB2lmRbyboCYErD3GRi26oHs1uYwHwYDVR0jBBgwFoAUqEpqYwR93brm0Tm3
pkVl7/Oo7KEwbwYIKwYBBQUHAQEEYzBhMC4GCCsGAQUFBzABhiJodHRwOi8vb2Nz
cC5pbnQteDMubGV0c2VuY3J5cHQub3JnMC8GCCsGAQUFBzAChiNodHRwOi8vY2Vy
dC5pbnQteDMubGV0c2VuY3J5cHQub3JnLzAfBgNVHREEGDAWghR3d3cuZ29sZGVu
c3RyYWluLmNvbTBMBgNVHSAERTBDMAgGBmeBDAECATA3BgsrBgEEAYLfEwEBATAo
MCYGCCsGAQUFBwIBFhpodHRwOi8vY3BzLmxldHNlbmNyeXB0Lm9yZzCCAQQGCisG
AQQB1nkCBAIEgfUEgfIA8AB1AOJpS64m6OlACeiGG7Y7g9Q+5/50iPukjyiTAZ3d
8dv+AAABbPItVkUAAAQDAEYwRAIgN4kh9+sdpJpN8uP9phjew/V4XTcXnsdUqeJR
aYwPpA4CIGT4jc1vBYdwuT1cMtAFScpcaF8rGLUHgDsoFYwpc4tjAHcAKTxRllTI
OWW6qlD8WAfUt2+/WHopctykwwz05UVH9HgAAAFs8i1WNQAABAMASDBGAiEA4NlE
B6MepbCmGoc22DiwhE/XcbSIbaotN/42mLGb1PMCIQDOKtj6AowUxS4VX3twdmQZ
TYVkfYc6FpYOIKwJR1txUTANBgkqhkiG9w0BAQsFAAOCAQEAk3BxOkCXQei7hTXo
+n0fi3Qf1lFl9OsoCPkIK0FtLHNTRSx8bRRY5dXH14ksvB+eavuAVuBKaM7joFiV
cQ1yJAyISKmqnbX0kBsSH7EdV5V9dnW3whBWkAhJ4iCg1Plek65SHDuzTw6u8rdL
YAUdLjS7mG8Vuhbbps8Pi+Gw6qLs4aOdQgO6sbsYazM1bOimYGSsSj9iGO8j9vbg
s6BUh5Al6NS1/o953/5QX+nTOYKE66Zxp+gLlXHu8UAijTU3FRhukh1uydReyX0N
bNZAFHQSucIx7mLDfUq4sSDLiFoMuZXzDNXIgGIszA1L7OA1JOXC78PcBh3nOj/I
4+3Kqw==
-----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY-----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-----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 302457598126085718623303502873587434371760
 . . . . . . . . [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 2019-09-02 12:32:33 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-12-01 12:32:33 +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.goldenstrain.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 (4208 bits)
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 793243562248191684624055675155641477968903731503178624273586148028640568124390964869966012886494533496424931292701202725081084969744849981785628405559769905250596241082618013461386842612454483664261624253710306863817101136788576570619550512245093474732748720078841858471670078181125824297048027795355320569988242504001933244252058252247959279712621138715460319292288542478585162913107151628951068699641280454236161879504670252542571246656654656739314990539652469859822586842163479061466567098027910839548858559470954289598055774175759623392664625436827334417904217896957489615833732120205172099862806199443210021901023126006317974898399939315953929073570394375789677654156687039164637873436479220207887613346237148665994753290488967245709468461413329073873683964228233920106339116475796425069605909559982561868511672503028345357545201584847028726670880736661571056554092698827731442762917932669754150056474791422878590428465488027177802174422440688721307110920322075596620264794527942431017383406129936118221344716416386905275843122442336906212272295369336074636898783628746332984437147204665955994777174487070538099025253538751566776290347113969494852665827162715595585744556782897266431524550641226069397996598758998679359505491401
 . . . . . . . . . . . . . . . . . . . . [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)
							581da59916f26e809812b0f71918b6ea81ecd6e6
 . . . . . . . . . . . . . . . . [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 (24 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.goldenstrain.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 (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 (245 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (242 bytes)
							00f0007500e2694bae26e8e94009e8861bb63b83d43ee7fe7488fba48f2893019dddf1dbfe0000016cf22d564500000403004630440220378921f7eb1da49a4df2e3fda618dec3f5785d37179ec754a9e251698c0fa40e022064f88dcd6f058770b93d5c32d00549ca5c685f2b18b507803b28158c29738b63007700293c519654c83965baaa50fc5807d4b76fbf587a2972dca4c30cf4e54547f4780000016cf22d56350000040300483046022100e0d94407a31ea5b0a61a8736d838b0844fd771b4886daa2d37fe3698b19bd4f3022100ce2ad8fa028c14c52e155f7b707664194d85647d873a16960e20ac09475b7151
 . . . . [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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