Security in electronic signatures: how does Ugosign protect you?

The electronic signature has become an essential tool for speeding up commercial and legal exchanges. But faced with growing security challenges, such as cyber attacks, identity theft or forged documents generated by AI, how can you be sure that your documents are secure?

At Ugosign, we place the security of your electronic agreements at the heart of our priorities. Find out how we guarantee the authenticity, integrity and legal value of every signature

1. The signature certificate: indisputable proof

Every time a document is signed via Ugosign, we automatically generate a signature certificate attesting to the transaction. Accessible at any time from your account, this document contains key elements

• Complete timestamp: precise date and time of receipt, reading and signature.
• Unique identifier: each signature has a unique fingerprint (envelope ID).
• Signatory identity: information such as email address or telephone number.
• Technical data: IP address, browser used (User-Agent) and operating system.

This certificate constitutes robust proof in the event of a dispute, reinforcing the traceability and reliability of your documents.

2. Authenticity: a forgery-proof digital signature

When your customer signs a document, a PDF file is generated with the contents of the contract and the signatures of the parties involved. But a PDF alone can easily be falsified by the wrong people.

At Ugosign, we add a digital signature that acts as an invisible stamp to :

• Attest to the document's origin (guaranteed provenance).
• Prevent fraudulent modification after signature.

This signature uses advanced cryptographic technologies to certify that the file is authentic, so if it is altered, the document automatically loses its legal value.

✅ See also: Electronic signature levels: simple, advanced, qualified - what you need to know

3. Integrity: a document protected against modification

The integrity of a document means that it has not undergone any modification after it has been signed. At Ugosign, we use cryptographic hashing technologies to guarantee this protection.

How does it work?

1. A unique digital fingerprint is generated as soon as the signed document is created (called a "hash").
2. This hash acts as an immutable photo of the document.
3. At each verification, Ugosign compares this hash with the version of the document to detect any modifications.

⚠️ Even a slight modification will render the fingerprint invalid, protecting your contract from any attempt at fraud.

Why choose Ugosign for your signature security?

At Ugosign, security isn't just about technology. It's also a commitment to simplifying your daily life while providing you with solid legal guarantees:

• Guaranteed authenticity with certificates and digital signatures.
• Full traceability thanks to technical data and time stamping.
• Documents protected against falsification.

With just a few clicks, you can secure your transactions and gain peace of mind.

✅ Read more

• DocuSign or Adobe Sign: how to choose the best solution in 2025?
• What is a signature and why is it important?
• Electronic signature levels: simple, advanced, qualified - what you need to know

Conclusion: Ugosign, your ally for secure electronic signatures

Electronic signatures must not only be practical, they must also be secure. Thanks to robust technologies such as cryptographic hashing and digital signature, Ugosign protects your agreements against any attempt at fraud.

Ready to secure your signatures?

👉 Create a free account today and discover how Ugosign simplifies your transactions while guaranteeing your legal security.

Find out more about cryptography and encryption

To deepen your knowledge, consult theCNIL article on the main principles of cryptology.