RT1020 Bus Encryption Engine

[rshipman]

Hi,

Does the Bus Encryption Engine encrypt as well as decrypt?

For example, if I was running an Encrypted XIP application (from serial nor flash), and I wanted it to write something to a different area of flash, what happens? Is it encrypted when writing, and decrypted when reading? Or are all read/writes to flash in plaintext, and only reads of the bootable image decrypted on the fly?

Many thanks.

[victorjimenez]

Hello, 

Does the Bus Encryption Engine encrypt as well as decrypt?

No, the BEE is implemented as an on-the-fly decryption engine only. 

Have a great day,
Victor

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[BYD_LV]

What should I do if I have access to flash and write data to flash at the same time?