Contents
Should initialization vector be encrypted?
An initialization vector (IV) is an arbitrary number that can be used along with a secret key for data encryption. The use of an IV prevents repetition in data encryption, making it more difficult for a hacker using a dictionary attack to find patterns and break a cipher.
How do you store a vector initialization?
Like a Salt value, an Initialization Vector can be stored in the public storage, along with encrypted data. And one of the possible ways to store it, is to add IV data to the encryption result : And parse it before decryption, from encrypted data: Full source code is available here.
Do you need salt to decrypt?
1 Answer. If you are not storing the master password then there is no need to salt it. If you are reusing the master password to generate a lot of single-use passwords then it will need to be stored encrypted and decrypted as required.
Is an initialization vector A SALT?
A salt and an initialization vector are mostly the same thing in the following sense: they are public data, which should be generated anew for each instance (each hashed password, each encrypted message).
When do you use the term salt in cryptography?
The answer above is correct when “salt” is discussed in the context of passwords. However, the term “salt” is also used for other uses of random but non-secret values. For a very rigorous treatment of salt, pertaining to randomness extractors, read Cryptographic Extraction and Key Derivation: The HKDF Scheme.
How to store an AES key ( IV )?
You will store IV along with ciphertext, it is not a secret. But please bear in mind, there are various modes for AES (or any other blok cipher). Please see this question and also this for GCM.
Is the salt the same as the initialization?
A “salt” is a kind of IV which: 1 is involved in some processing of a password; 2 should be distinct for each processing instance (it cannot be a fixed conventional value); 3 only needs uniqueness (“it is not repeated”), not uniform selection among the space of possible salts (although uniform… More
Do you use the same key for symmetric encryption?
You describe very little about why you are using symmetric encryption, but in general, you use the same key but a different IV for each encryption operation, provided encryption and decryption takes place on the same device. The IV is not a secret value but it should be randomly generated using a CSPRNG.