What is an Advanced Electronic Signature (AES) and when should it be used?

An Advanced Electronic Signature (AES) is a type of electronic signature that meets specific criteria set forth by regulations such as the eIDAS Regulation in the European Union. AES provides a higher level of security and reliability compared to a Basic Electronic Siganture (BES) but not the same level as a Qualified Electronic Signature (QES).

Key characteristics of an Advanced Electronic Signature

Unique to signer
AES is uniquely tied to the individual signer, ensuring the authenticity of the signer's identity. This is typically achieved through the use of cryptographic techniques and secure key management.

Tamper-evident
Advanced electronic signatures provide a level of tamper-evidence, making it apparent if any alterations have been made to the signed document after the signature has been applied. This ensures the integrity of the document throughout its lifecycle.

Secure key infrastructure 
Public Key Infrastructure (PKI) is often a fundamental component of advanced electronic signatures. It involves the use of public and private keys to encrypt and decrypt the signature, adding an extra layer of security. This ensures that only the intended parties can validate and access the signed document.

Non-repudiation
One of the crucial aspects of an advanced electronic signature is its ability to prevent the signer from denying their involvement in the signing process. Non-repudiation ensures that once a signature is applied, the signer cannot disown the document.

Compliance with regulations
Advanced electronic signatures adhere to various legal frameworks and regulations, such as the eIDAS Regulation in the European Union, ensuring that the signatures are legally recognized and enforceable.

When to use an Advanced Electronic Signature

Legally binding documents
Use advanced electronic signatures when dealing with contracts, agreements, or any other legally binding documents. The advanced features provide a higher level of assurance and compliance with legal requirements.

Sensitive transactions
For transactions involving sensitive information, such as financial transactions, healthcare records, or confidential business agreements, advanced electronic signatures offer an added layer of security and protection against fraud.

Cross-border transactions
In cases where parties are located in different jurisdictions, advanced electronic signatures can simplify and streamline the signing process, as they are often recognized across borders, especially within the context of international regulations.

Government and regulatory compliance
Many industries and governmental bodies have specific compliance requirements. Advanced electronic signatures can be essential for meeting these standards, ensuring that your documents are accepted and legally recognized.

When using an Advanced Electronic Signature, individuals and organizations can have confidence in the security, uniqueness, and legal recognition of the electronic signature. It is important to understand and comply with the specific requirements outlined in the relevant regulations or standards governing electronic signatures in the jurisdiction where the signature is being used.