CODEWITHSUNDEEP
javaencryptioncryptographyinitialization-vector
sYl3r
sYl3r

Reputation: 393

Initialization Vector on Cryptography


I have a question regarding how initialization vector works on cryptography.

I have bit of knowledge about creating a IV and my question would be this,
I know about SecureRandom class so once I create a IV through this it will perfectly encrypt the data, what I don't understand is how can you get the same IV for the decryption process? (Please explain I need to know about this to create an algorithm for a assignment)

Upvotes: 2

Views: 1344

Answers (1)

Daniel Roethlisberger
Daniel Roethlisberger

Reputation: 7058

Usually, the IV is sent along with the ciphertext in network protocols, or stored somewhere along with the ciphertext, e.g. at the beginning of the file in a file encryption scheme. For block ciphers in CBC mode, it is very common to simply send or store the IV as first ciphertext block. The IV is not a secret, but depending on your cryptosystem, it should not be reused or be predictable.

Upvotes: 4

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