| ARM926EJ-S
MMU | Memory
Management Unit | Memory
Management Unit | – |
| PIO | I/O Control/ Peripheral
Access | When a
peripheral is not selected (PIO-controlled),
I/O lines have no access to the
peripheral. | – |
| AES | Cryptography
Standards | Hardware-accelerated AES up
to 256 bits | FIPS-compliant |
| SHA | SHA up to 512
and HMAC-SHA |
| TDES | Hardware-accelerated Triple DES |
| TRNG | True Random Number
Generator |
| AES, TDES | Cryptography Tamper | Immediate clear of keys in case of
external tamper event detection (if enabled) | |
| AES, TDES, SHA | Cryptography
Integrity Checks | AES/TDES/SHA embed
integrity checks on configuration registers and algorithm circuitries and a
specific flag in status register. If this specific flag is set, an integrity
error has been detected. This can occur only on abnormal operating conditions
(electromagnetic attacks, VDD glitches, etc.) | – |
| OTPC, AES, TDES, TRNG | Cryptography
Private Key Bus | Capability to
transfer a key to AES/TDES in a totally invisible manner from software | – |
| Secure Boot | Secure Boot | Code encrypted/decrypted, Trusted Code
Authentication | Hardware SHA (HMAC) + Software RSA or AES
Hardware (CMAC) |
| Memories | Scrambling | On-the-fly
scrambling/unscrambling for memories | All external
memories such as QSPI, DDR, and all memories on SMC |
| RTC | IO Tamper Pin | Eight tamper
detection pins | VDDCORE WKUP1 to WKUP8 pins can be selected as a source of
tamper, performing an immediate clear of AES/TDES keys (if enabled), immediate
clear of scrambling keys in SDR/DDR/QSPI/SMC, and immediate clear of General
Purposes Backup Registers (if enabled) |
| Timestamping | Timestamping of
tamper events | All events are logged in the
RTC. Timestamping gives the source of the reset/erase
memory/interruption |
| Configuration | Protection against bad
configuration (invalid entry for date and time are impossible) | – |
| Glitch Robustness | Glitch on 32 KHz does not corrupt
the downstream counters | Glitch on 32 KHz can only create a
phase shift of the downstream counters |
| Integrity Check | If RTC Status flag TDERR is set,
counters integrity have been corrupted | – |
| Secure OTP | JTAG Access Control | Disable JTAG access by OTP bit | – |
| PIT64B, TC | Integrity Checks | PIT64B/TC embed
integrity checks on configuration registers and algorithm circuitries and a
specific flag in status register. If this specific flag is set, an integrity
error has been detected. This can occur only on abnormal operating conditions
(electromagnetic attacks, VDD glitches, etc.) | – |
| GPBR | Access
Protection | GPBR can be
write-protected and/or read-protected | – |
| Tamper | GBPR can be
immediately cleared on tamper detection (if enabled) | – |
