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How Secure are Electronic Signatures

Electronic signatures can help in validating identity of the document creator. They can serve as a replacement of handwritten signatures. The ESIGN Act in the US makes the content of the digitally signed document as binding to the respective parties.   

Out of all the different types of electronic signatures, cryptographic digital signatures are the most secure way to sign the document. In this article, we will take a close look at digital signatures for signing business documents.

Cryptographic Digital Signature: An Introduction

Digital signatures are made using online pdf creator that supports digital signature signing features. The digital signature ensures data integrity and message authentication. It also allows non-repudiation of digital messages.

Reliable online digital signature services create esignatures that are compatible with ESIGN Act. The Electronic Signatures in Global and National Commerce (ESIGN) Act was introduced in 2000 to specify digital signatures that are legally valid and enforceable. Using online digital signature services that complies with ESIGN Act ensures that the business document that is signed using the e-sign is legally binding.

Security of Digital Signatures

A reliable online service that offers digital signature service has encrypted sites that feature 256-bit SSL security. The servers are located at highly secure SAS 70 Type II premises with backup power. In this way there is little to no chance of the servers being hacked by a third party.

Digital signatures are created using a cryptographic code. The code is generated by using a secrete key that identify a user.  The key is highly secure that cannot be replicated.  The online servers make use of complex algorithm to generate digital keys that identify the users. Hackers can’t replicate the keys since the hash value that identifies a user is completely unique for every user.

The digitally signed data will remain valid unless it is modified by a person. When any modification is made in the document, the key that identifies a user will become invalid. The document needs to be signed again to ensure integrity of the data.  

Bottom Line

Digital signatures represent the most secure esignatures that can’t be use for fraudulent purposes. They are unique for each user and cannot be easily replicated. There is little chance of hackers manipulating the signature to carry on shade activities.

The digital signature will not be verified in case someone tries to modify the document. The unique key that represents the digital signature will remain valid as long as no changes are made in the document. The creator of the document can safely deny modifying the document in case the content has been modified by a third party. This prevents disputes that arise later on relating to the signed document.


The hash of the output file must match with the original document. If any modification is done in the file, the document will have to sign again by the same person.  

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