xvidelo.com

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 04:9a:5b:c8:2e:97:11:d6:b6:89:a6:4a:31:2f:ed:73:60:72 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=xvidelo.com

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 04:9a:5b:c8:2e:97:11:d6:b6:89:a6:4a:31:2f:ed:73:60:72
Serial Number (int): 400974627384813459394748241235598839603314
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: 8d:b2:45:7c:2e:14:a5:45:fb:7f:57:e5:b1:f2:d5:31:8e:8e:4b:36
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 55:9a:63:17:15:4f:12:e8:25:17:77:1e:33:db:fa:75:03:be:d7:f3
Fingerprint (sha256): 0b:ea:e0:8b:71:c9:b4:25:45:e4:8d:80:77:d2:27:4d:4e:e6:ef:78:96:a9:36:4d:09:6c:a6:a6:0c:68:ec:99

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 xvidelo.com

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for xvidelo.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

xvidelo.com

Other certificates including the domain name xvidelo.com

(limited to 100 certificates)
xvidelo.com
www.fritigern.com
www.xvidelo.com
xvidelo.com

Certificate

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

Certificate (PEM)

-----BEGIN CERTIFICATE-----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-----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 400974627384813459394748241235598839603314
 . . . . . . . . [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 2019-12-14 08:40:02 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-03-13 08:40:02 +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 'xvidelo.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 891296299217040673070321421236265003374903766649610616770808035921870733837600346864572139551291113108315339212726546180591795214316058368400096266441609580969304107159268433588931153075591889894850499721719138936433122488917866904109815560152793898417269506981146165030940497335168569186867874164559307578104750410029508744071651866413101060291679833292315765698034246098076739988403171175297217827811332712594447645538553535291551309719042435413325746382631559094144370281793821299334232301278960983218828560282928254172174069508305368801652937056290481113009658235643326557477207446647967751050615478759691722531140000358851133218854697770171966199841056811073830688356340537550608766088279021791560474230898626360677501718002079230945755256089763169903569028924309269065760363817138276557049484443033906561531998126774024826136458594470189846251404451601742826953274736080123592841659720581203281507009532856856714812249840879356694209216584014710028753796976800151278106217734826665045417039179058016148036389716179534211344432502309177441315896563591692391062199104116417819733600884822657915492115768003545528187188038688846804855903845686717167218436454882871898287145974259905746308824783684278853940380834981015887380145087
 . . . . . . . . . . . . . . . . . . . . [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)
							8db2457c2e14a545fb7f57e5b1f2d5318e8e4b36
 . . . . . . . . . . . . . . . . [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 (15 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'xvidelo.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 (247 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (244 bytes)
							00f2007700f095a459f200d18240102d2f93888ead4bfe1d47e399e1d034a6b0a8aa8eb2730000016f03c77c240000040300483046022100b6a8362e7f97d260ee8c9f687676cb6187cced88bc882359906e12ccbedd0237022100f3a6723a6aee537369c0ac8c1fc564ca2d654bab5312249ff68979ed199203a5007700b21e05cc8ba2cd8a204e8766f92bb98a2520676bdafa70e7b249532def8b905e0000016f03c77c180000040300483046022100beb7ea18f1ba169528a9db986df9d97eed4a8a3e6e081b2e84dba4d4fce4a1540221009cc72eff4d9f3032338429120b4f3ccd7f4c2dc5024c0a181148bc9ad3acfc98
 . . . . [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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