filesbak.com

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:5f:e0:77:87:40:21:98:fc:c4:d8:e7:ec:49:88:fc:ef:99 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=filesbak.com

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:5f:e0:77:87:40:21:98:fc:c4:d8:e7:ec:49:88:fc:ef:99
Serial Number (int): 293962050350358177618515190016380204019609
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 1b:d0:6c:ad:e2:dd:d6:7f:a3:e0:b9:cb:31:98:3a:83:c6:cf:e6:39
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): f4:73:ab:ed:9e:cc:1a:8a:45:a4:a5:c1:ce:c8:18:ac:8a:1e:5f:f5
Fingerprint (sha256): 52:d4:a3:c8:f6:16:df:34:7c:8d:63:40:16:81:1c:2a:88:16:b2:77:1c:b1:ed:64:36:c8:96:e3:b5:c8:e7:e4

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 filesbak.com

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for filesbak.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

filesbak.com

Other certificates including the domain name filesbak.com

(limited to 100 certificates)
filesbak.com
filesbak.com
zincgluconate.com
ignatenko.com
www.filesbak.com

Certificate

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

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAxbs7QgHRiPb1nzbKSJxM
ORTad481bCUQXVWo5vCmP+CEwPj5+Gx574R6ju6Rh4LnXtjcrMNVQuiPdwevzCpx
LIt+f5SoOlyUbcxm5gG9r4ETKszOBFcN3Iyjb7GpoHJ/Z5OEPgcUfEIQc7/d2Rv3
L7ZFjSQn+q/o3QarELsycorzWmPWut3Xjy7iFGso5d28t6+3nUN2ZL25iUG4SIPW
pil8XTmFNT+sQYmVLu0i7jIctJoCrTED63t+qcY6oK0HnSmi1ljUq/s/8uVMK77Z
vU6XcFMiEIE4tDnM10ibvZmBE2unaABr8PVl/yEOchp9jcaqN4xbVGNsmbMwMHRQ
Ajt+iI4z+TjK2mRFNKPmBRbTRccvVSx6TTGwMJnZsC/7eCrsP6TyLUjY/+geXd2w
VV5FE2SDoy20/7YNuQbe541/SSMss4/bUqQ2yAm7givn8kG88Wqid060UtFbcCdy
BCrWnFGVUqrLF0gPt4bQI/iOnJmo6LjFrGS0LQC6gOkvNqIS4OR/Rl5MH5Rur95E
cn70w2br09rntVii0yJKE5KlVZn0nfO4hdyU/02hJ5bH6XOheFNtuOIOqAw9o2bP
4ec7QJgvfqx8q5NLsrTDjXj2/WQYYTRUtZcdAq4WojR8LJ9DiApokx+h9Fy/jBdo
xaAxuk6BJizIgm8sEqNIJDMCAwEAAQ==
-----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 293962050350358177618515190016380204019609
 . . . . . . . . [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 2019-11-22 08:36:36 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-02-20 08:36:36 +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 'filesbak.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 806673622728711217884518526895905786494753417263107851982624286792897969541076269230186668733552756059050407755264852536319154511149101057721074976674295917648293544612413176630745024195149199803726316749839763605427103092131324052353845645559130677062134616637297946838507203553816110560738371811910929282956052973208077827128603646032073239068358069591589099180218358165801913445592755231276913832006582419688283586725525615438460433244652140423790964292618850121093666240289245618982007509133169510535208428301217723368383522508406259711089039357199871489589159147574474147186510883528111270868409924449849540751493164462556426621623659755678378295818232975161008109398447059699319755837736346295044650682436154475050806773405862669479207373010958995774274781659074649655612272482878024389017671178885852221764327808653027329044369366806407176098160098195457826740662872991388158044308883132786735323823416309679250098561517691316237431895331062935578821144759645241192049802855309115672835571884118011904429304721498568573535707547062633160123474622327113823244591561631861408225364324836491622181024618263550971109459045905957250711600528928038630051008313489547733017281779221452712667162751197212829317862180265167444060415027
 . . . . . . . . . . . . . . . . . . . . [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)
							1bd06cade2ddd67fa3e0b9cb31983a83c6cfe639
 . . . . . . . . . . . . . . . . [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 (16 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'filesbak.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 (244 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (241 bytes)
							00ef0076005ea773f9df56c0e7b536487dd049e0327a919a0c84a1121284187596817145580000016e92786f4d0000040300473045022100f784c4e47f814e076fde429ef2e6f1e1e5880b8ef01dd68957d64d72aafe73ec022069490a70277c2a14e9d9dc6bd0a6ee81dacd9ae63d3bd60bd826432f70556661007500b21e05cc8ba2cd8a204e8766f92bb98a2520676bdafa70e7b249532def8b905e0000016e92786f3d0000040300463044022048ef3cc2dc3206002be2e7c9f9fb70974eb86b31d96464e10891cc23b625bf400220797d26f5e9ba3d2d3a0d286a5c4d7ebe90497fb7561553dbcc37e71280cc533b
 . . . . [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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