Seed (phrase) / Secret Recovery Phrase - The seed phrase, mnemonic, or Secret Recovery Phrase is a crucial part of public blockchain technology, they all refer to a set of ordered words which correspond to determined values. These values never change, and therefore the same string of words in the same order will always produce the same number–this is the underlying functionality that allows seed phrases to back up wallets. The Secret Recovery Phrase is exactly what it sounds like: something that is secret, and should be known only to the owner of the account. If the seed phrase is given to someone else, that person has complete control over the account; they can drain it of tokens and funds, execute transactions with it, etc.