WinSesame Certification :

Signature and certification of a file:

The certification of a file consists in saving on a secure server a digital signature of this file but not the file itself. Any file of any type has a unique digital signature but from this signature it is impossible to reconstruct the file. This digital signature is then associated with a readable signature created by the signatory of the file. This signature is time stamped by the server and not by the signatory. It has a unique and non-modifiable identifier of the signer on the server. In order to be able to provide proof of the ownership of the file, the signatory may include in his signature the digital signature of a private and unique signature file that he is the only one to possess (private key). The signature is then saved on the server. The same file can not be signed twice by the same person or not.

The verification procedure will be used as appropriate to:

To ensure that the file conforms to the least byte to the original which is important in the case of a file offered for download, transmitted as an attachment, available on a network, hosted in a cloud etc ... for protect yourself from simple problems of incomplete download, transmission error etc. or intentional corruption of a file for the purpose of installing a malware, spyware, ransomware, virus or takeover of a computer.

To certify the ownership of the file thanks to the unique identifier contained in the signature plus the private signature file that the signatory has included in his signature and of which he is the only one able to provide the original and his digital signature. Intellectual protection of all types of data: music, photos, videos, patents. Proof of date of deposit. Legal documents etc ...

Access the digital signature of a file and verify its integrity.

You have received as an attachment or downloaded a signed WinSesame Certification file.This page allows you to view his signature and verify its integrity.The display of the signature of a certified file attests that it has not been modified since it was signed.Otherwise it means that this file is corrupted. It may have been modified to falsify the original content or include malicious code. The file may also be incomplete due to a download problem. Do not open this file. Depending on the case, contact the signer to obtain a compliant file or restart the download.

Any file type can be certified WinSesame Certification even executable files for which integrity checking is especially important for protection against virus.

Online checker:

Verify the integrity of a WinSesame Certification signed file (<10Mb. For large files install the free application) :

(Depending on the volume, you may have to wait while sending to the server.)

Other verification options without file transmission and size limit:

Install WinSesame Pro, Classic, or Free: All versions of WinSesame allow verification of file signatures without size limit:

With WinSesame you can also:

Encrypt your files and folders using the most powerful WNS1040 algorithm currently available (+5 other agorithms).

Hide your encrypted files and folders behind photos. (Pro version)

Create self-extracting encrypted archives that can be used even on computers where WinSesame is not installed. (Pro version)

Sign your documents using WinSesame Certification (Classic or Pro version).

WinSesame Certification: Free application that allows the verification of file signatures without size limit and the signing of documents using your WinSesame Certification Plus account. The WinSesame Certifcation application is included in all versions of WinSesame (version 11.1 or +).

Comparative table of versions:

Features / Version	WinSesame Pro	WinSesame Classic	WinSesame Free	WinSesame Certifcation
Encryption of files or complete folders by password.	YES	YES	Restricted	---
Double encryption of files and folders by password plus signature file.	YES	NO	NO
Export encrypted files and folders to self-extracting archives.	YES	NO	NO	---
Hiding encrypted files or folders behind photos ..	YES	NO	NO	---
Verification of WinSesame signatures Certifications without limit of file sizes.	YES	YES	YES	YES
Free signature storage space on the WinSesame Certification Server.	50	10	NO	NO
Possibility of using a WinSesame Certification Plus account.	YES	YES	YES	YES
Price : (Lifetime license for 1 computer. Multi-station license available.)	USD 67.00 Purchase	USD 49.00 Purchase	Free Install	Free Install
Hosting space WinSesame Plus Certification for 1000 signatures.	1 €/month Subscription	1 €/month Subscription	1 € month Subscription	1 €/month Subscription