---
title: "pbTLS Security Dimension On Embedded Devices"
url: "https://maker.wiznet.io/WIZnet/projects/pbtls-security-dimension-on-embedded-devices/"
markdown_url: "https://maker.wiznet.io/WIZnet/projects/pbtls-security-dimension-on-embedded-devices/md"
type: "UCC: User Created Content"
author: "WIZnet"
original_url: "https://www.pointblank.de/en/it-security-solutions"
published: "2023-02-08"
language: "en"
likes: 3
views: 239
comments: 0
source: "WIZnet Makers (https://maker.wiznet.io/)"
---

# pbTLS Security Dimension On Embedded Devices

> .

Original source: https://www.pointblank.de/en/it-security-solutions

## Article

Already performed some early benchmarks:

The test environment is a device-to-device scenario consisting of two ARM Cortex M4 @168 MHz and 20kByte RAM in combination with a WIZnet W5500 TCP/IP Ethernet controller.

As a real life comparison we also captured performance data on a Windows or Linux based PC with Core i5 @1.7 GHz with 12GB RAM.

Test application in all benchmarks is a normal (https) webserver demo.

Baseline values for the PC: 50 ms for complete RSA key exchange and RSA key calculation at a total of ~200 ms for the complete transaction.

The following devices are in our benchmark pipeline: ARM Cortex M3 @20 MHz to 50 MHz and ARM Cortex M7 @216 MHz/300 MHz

## **Connection Time**

- 2.6 ms for TCP socket initialization

- 1.4 ms for client hello

- 1.4 ms for server hello

- 161.6 ms for TLS negotiation

- 195 ms for RSA Key exchange

- 346 ms for RSA decrypt

- 60 ms for web page delivery

- A total of 768 ms for the complete transaction

## **Memory Usage**Flash:

- 50 kByte pbTLS library

- 50 kByte demo application

RAM:

- 500 Byte to 5 kByte dynamically
  (depends on application, max ~16 kByte)

## **Power Consumption**

- 170 mA @ 3.3 V (~560 mW) maximum

Source : <http://www.pointblank-security.net/pbtls/benchmarks/>

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Source: https://maker.wiznet.io/WIZnet/projects/pbtls-security-dimension-on-embedded-devices/