IDEA (International Data Encryption Algorithm )
- IDEA is a block-oriented conventional encryption algorithm (symmetric)
- Proposed by Lai and James Massey in 1991
- inputs : 64 bits for each block
- Confusion :The relation among plaintext , ciphertext and key should be
complicated such that it can't be inferred from the statistics of ciphertext
- Diffusion : Each plaintext bit and key bit should influence every