1 /**

     2 @page Security_signatures Digital signatures

     3 

     4 A digital signature is used to verify that a message (or data) actually came from the sender (the one who signed the 

     5 message) and that it has not been tampered with.

     6 

     7 A signature is formed by producing a fixed-length digest (@ref hash) of the message using a hash algorithm, which is then 

     8 encrypted using the sender's private key. This signature and the message are then sent to the recipient.

     9 

    10 The receiver can then verify the signature as follows: a @ref hash is produced of the sender's message (using the hashing 

    11 algorithm sent with the signature); also, using the sender's public key, their signature is decrypted into a @ref hash. 

    12 These two hashes are compared: if they are the same, it is more or less certain that the public key used for the 

    13 @ref decryption corresponds to the private key used to create the signature, thus data integrity is validated.

    14 

    15 

    16 */