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Random initialization Vector (IV) with Cipher Block Chaining (CBC) Mode algorithm #3

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GokhanArik opened this issue Sep 24, 2015 · 1 comment

GokhanArik commented Sep 24, 2015

byte[] iv = new byte[writer.getBlockSize()];

I was told that we should use random number for iv size. Do you confirm that? What should be limits of the random size?

Owner

sveinungkb commented Sep 24, 2015

The IV is hashed with SHA-256, so regardless of what you pass in it will be 256 bits which is the entropy size for the IV for this AES configuration.

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