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Does AES need salt?
AES doesn’t have a concept of a salt. It just takes data, and a key. For the same input, it will always generate the same output. How you combine your message with your salt is up to you.
Does AES require key?
AES uses symmetric key encryption, which involves the use of only one secret key to cipher and decipher information.
What is salt in AES encryption?
In cryptography, a salt is random data that is used as an additional input to a one-way function that hashes data, a password or passphrase. Salts are used to safeguard passwords in storage.
How are passwords and salt used in encryption?
In this scheme, a human-memorizable password is used, in combination with a salt, to generate an AES key. A salt is used so that the same password does not always generate the same key; however, because the recipient must be able to generate the correct key, the salt must be transmitted along with the encrypted data.
When do you use a salt with AES?
AES itself does not directly use a salt (or indeed, an IV). A situation when you might use a salt in combination with AES is when you are using Password Based Encryption (PBE). In this scheme, a human-memorizable password is used, in combination with a salt, to generate an AES key.
Why do we need salt in IV cryptography?
Including a unique salt in this process is important, because it prevents an attacker from gaining a significant advantage by targeting multiple users in parallel. Without a salt, an attacker could just run the slow key-derivation process once for each password, and then quickly test the resulting key against every captured message.
When to use a salt or an IV?
A salt is used so that the same password does not always generate the same key; however, because the recipient must be able to generate the correct key, the salt must be transmitted along with the encrypted data. An IV is required if you are using AES in certain block cipher modes, like CBC.