General information AN5056
6/49 AN5056 Rev 8
1 General information
Table 1 and Table 2 present the definitions of acronyms and terms that are relevant for a
better understanding of this document.
Table 1. List of acronyms
Acronym Description
AES Advanced encryption standard
DAP Debug access port
ECDSA Elliptic curve digital signature algorithm
GCM AES Galois/counter mode
HAL Hardware abstraction layer
IDE Integrated development environment
FWALL Firewall
MPU Memory protection unit
OTFDEC
On-the-fly decryption
PEM Privacy enhanced mail
PCROP Proprietary code readout protection
RDP Readout device protection
SB Secure Boot
SE Secure Engine
SFU Secure Firmware Update
SBSFU Secure Boot and Secure Firmware Update
UART Universal asynchronous receiver/transmitter
WRP Write protection
Table 2. List of terms
Term Description
Firmware image An executable binary image run by the device as a user application.
Firmware header
Bundle of meta-data describing the firmware image to be installed. It contains
firmware information and cryptographic information.
mbedTLS
mbed implementation of the TLS and SSL protocols and the respective
cryptographic algorithms.
sfb file Binary file packing the firmware header and the firmware image.
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