Have you ever worked with a digital signature (ECP)? How does the ECP mechanism work?

Electronic digital signature (EDS) is a cryptographic mechanism that confirms the authenticity and integrity of an electronic document.

The principle of EDS operation is based on asymmetric cryptography:

1. A hash (fingerprint) of the document is created using a hash function.
2. The hash is encrypted with the sender's private key — resulting in a digital signature.
3. The recipient, having the sender's public key, decrypts the signature and obtains the hash.
4. The recipient independently computes the hash of the received document and compares it with the decrypted hash.

If the hashes match, it means the document has not been altered and is indeed signed by the owner of the private key.

Experience with EDS usually includes integration with libraries for creating and verifying signatures, setting up key infrastructure, and ensuring the security of private key storage.