Stream ciphers run on which of the following？（）A、Fixed-length groups of digits called blocksB、Individual blocks，one at a time，with the transformations varying during the encryptionC、Individual digits，one at a time，with the transformations varying during the encryptionD、Fixed-length groups of bits called blocks
Stream ciphers run on which of the following？（）
- A、Fixed-length groups of digits called blocks
- B、Individual blocks，one at a time，with the transformations varying during the encryption
- C、Individual digits，one at a time，with the transformations varying during the encryption
- D、Fixed-length groups of bits called blocks
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