Cryptography & Data Integrity

AUTOSAR SecOC Engine

secoc is an AUTOSAR SecOC (Secure Onboard Communication) MAC engine,

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ASIL-B

target

92.75%

SPFM

90.00%

LFM

PASS

FMEDA

18.6K

gates

1.0.0

version

The deliverable

What you’re licensing

secoc is an AUTOSAR SecOC (Secure Onboard Communication) MAC engine, It is delivered as a licensable soft-IP block engineered as an ASIL-B Safety Element out of Context — not just RTL, but the complete functional-safety work package needed to carry it into an ISO 26262 program:

Synthesizable RTL

Portable, vendor-neutral SystemVerilog that drops onto your existing SoC fabric — no foundry or EDA-tool lock-in.

Per-IP FMEDA report

SPFM / LFM / PMHF computed against the ASIL target per ISO 26262-5 — the quantitative analysis your assessor asks for.

Safety manual

Assumptions of use, the safety mechanisms and their diagnostic coverage — written to drop straight into your safety case.

IP-XACT + integration docs

A machine-readable descriptor plus register and integration documentation for fast, low-risk bring-up.

Self-checking testbench

A self-checking (crypto: bit-exact) testbench and a one-command build, so you can reproduce every claim on day one.

What it is

secoc is an AUTOSAR SecOC (Secure Onboard Communication) MAC engine, delivered as synthesizable SystemVerilog soft-IP with an APB4-lite control interface and built-in ISO 26262 (ASIL-B) safety instrumentation.

Key Features

AES-128 CMAC generate/verify (RFC 4493 vectors)
Truncated MAC + freshness anti-replay window
MAC-verify fail / replay (\rightarrow) err_code 3
Verify timeout (err_code 4) + CMAC-FSM DMR (err_code 9)
Config-register parity over key/data-id (err_code 1)
Above CAN / automotive Ethernet

Standards & Compliance

AUTOSAR SecOC, NIST SP 800-38B (CMAC), RFC 4493

Functional Safety

ASIL-B (SEooC) · SPFM 92.75% · LFM 90.00% · PASS

ISO 26262:2018 · FMEDA available · Safety Manual included

Register Map

Offset	Register	Description
`0x00`	CTRL	[0]=START (kick the CMAC engine) [1]=VERIFY (1=RX/verify, 0=TX/generate) [2]=LAST_K2 (final block was zero-padded ->…
`0x04`	STATUS	RO [0]=BUSY [1]=DONE [2]=MAC_OK (last verify matched) [3]=FRESH_OK [4]=MAC_FAIL (last verify mismatch) [5]=REPLAY_FAI…
`0x08..0x14`	KEY0..3	128-bit CMAC key (KEY0=MSW)
`0x18`	DATA_ID	16-bit SecOC data identifier (low half-word used)
`0x1C`	MACLEN	truncated MAC length in bits (24 / 28 / 32 supported; clamped 1..32)

…7 more registers — see datasheet for the full table.

Getting Started

// Minimal instantiation
secoc #(
  .ADDR_W(6)
) u_secoc (
  .clk       (clk),
  .rst_n     (rst_n),
  // APB4
  .p_paddr   (paddr),
  .p_psel    (psel),
  .p_penable (penable),
  .p_pwrite  (pwrite),
  .p_pwdata  (pwdata),
  .p_prdata  (prdata),
  .p_pready  (pready),
  // Safety
  .err_clear (1'b0),
  .err_valid (err_valid),
  .err_code  (err_code)
);

Configure via the CTRL register after reset to enable the IP and set operating parameters. Monitor err_valid / err_code for any safety faults reported by the built-in safety monitor.

Applications

Where it fits

Typically deployed in secure boot, firmware authentication, key storage, and confidential on-board communication.

The case

Why license it, not build it

Skip 12–18 months

The FMEDA and the safety case are already generated. You integrate a finished safety element — you don’t stand up a safety-IP program to originate one.

One vendor, one safety story

Every block in the catalog shares the same safety architecture, fault-reaction model, and FMEDA methodology — so subsystems roll up cleanly.

Verified, not vapor

The RTL builds and passes today; the safety metrics come from analysis and fault injection against real RTL, not a datasheet promise.

Interested in AUTOSAR SecOC Engine?

Pricing, the per-IP FMEDA, safety manual, and RTL data room are shared under a mutual NDA.

Talk to us →See related IP

Figures are pre-silicon engineering-grade estimates for a Safety Element out of Context (SEooC); final ASIL sign-off is the integrator’s, supported under NDA. FMEDA and Safety Manual available under NDA.

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