公开(公告)号：US20190354727A1

公开(公告)日：2019-11-21

申请号：US16526665

申请日：2019-07-30

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Thomas LUNDGREN ,  Johan UDEN

IPC: G06F21/72 ,  H04L29/06 ,  G06F13/42

Abstract: The application relates to a processing device comprising a buffer coupled to a system bus, a ciphering device coupled to the system bus, and a memory coupled to the ciphering device. The processing device is configured to operate in at least one of a deciphering mode and a ciphering mode. In the deciphering mode, the ciphering device is configured to receive a ciphered data unit directly from the buffer over the system bus, decipher the ciphered data unit so as to obtain a deciphered data unit, and transfer the deciphered data unit to the memory. In the ciphering mode, the ciphering device is configured to receive a data unit from the memory, cipher the data unit so as to obtain a ciphered data unit, and transfer the ciphered data unit directly to the buffer over the system bus.