Complex sentence: Like other digital signature algorithms, EdDSA requires a secret value, or nonce, unique to each signature, however EdDSA calculates this nonce deterministically, as the hash of the secret key and the message, rather than rely on a random number generator.
Split into simpler sentences: Like other digital signature algorithms, EdDSA requires a secret value, or nonce, unique to each signature. However EdDSA calculates this nonce deterministically, as the hash of the secret key and the message, rather than rely on a random number generator.