Secure Software for the Internet of Things

Internet Software for Embedded Devices

Today, the Internet connects billions of users worldwide and is an integral part of how people work, play, and communicate. Research shows that billions of “smart” devices are active members of the networked world busily collecting, securely distributing and acting upon all forms of data. As the premier provider of Internet and Security software for embedded applications, Allegro services OEM manufacturers creating “smart“ and secure devices with easy to use, feature-rich Internet enabling software toolkits.

The Allegro AE Product Suite delivers powerful Internet and device security technology specifically engineered for the rigors of embedded computing to OEM design engineering teams. The Allegro AE suite offers IPv4 and IPv6 operation enabling OEM manufactures to build secure embedded device management architectures that perform seamlessly in IPv4 and IPV6 networking environments alike. The Allegro AE product suite is pre-integrated with the ACE™ (Allegro Cryptography Engine) FIPS 140-2 level 2 validated cryptography module, enabling manufacturers to add standards-based cryptography to resource-sensitive embedded systems quickly, easily, and reliably while decreasing time to market. The family of Allegro AE product toolkits deliver field-proven standards-based protocol components to securely serve Web pages, images or applets, securely retrieve files from resources on the Web, quickly create a secure and robust Command Line Interface (CLI), and exchange XML and SOAP messaging with enterprise or cloud-based computing and storage resources.

Advanced device management architectures

Shipping inside over 200 million products with over 300 design wins worldwide, Allegro is a leading OEM supplier of embedded networking technology. The entire product family is delivered as ANSI-C source and has been ported to all major processor and RTOS platforms. All products utilize a field-proven software abstraction layer to provide an interface to any RTOS, TCP/IP protocol stack and file system environment. Delivered as stand-alone products or as a pre-integrated suite, Allegro’s toolkits offer unprecedented design flexibility and scalable Internet networking solutions for your design needs.

rompager advanced edition product family

RomPager AE

RomPager AE is a full-featured HTTP 1.0/1.1 Web server toolkit that offers IPv4 and IPv6 operation, CGI-style user exit support, an internal security database, optional file support, and PageBuilder HTML offline compiler. The PageBuilder compiler dramatically reduces development time, coding effort, and potential errors by converting HTML into compilable source code. The compiler provides full support for HTML (2.0, 3.2, 4.0 and 5.0), XHTML, JavaScript, object compression, application compression, and international languages with dynamic phrase dictionaries.

RomWebClient AE

The RomWebClient AE toolkit is a full-featured HTTP 1.0/1.1 Web client that retrieves and stores objects from any remote Web server using HTTP over IPv4 or IPv6. Objects can be in any format and are stored in memory or in an optional file system. The toolkit also supports caching, cookies, HTTP pipelining capabilities, and advanced HTTP streaming.


RomSTL is a small, resource sensitive TLS client and server solution specifically engineered for embedded systems. RomSTL is pre-integrated with the full suite of RomPager AE products making it easy to envoke TLS as needed. RomSTL supports the latest RFC standards for TLS 1.0, TLS 1.1, and TLS 1.2 secure server and client sessions. The toolkit is hardware and software platform agnostic and written from the ground up for efficiency. The encryption protocols interoperate with any secure browser or server and include FIPS 140-2 validated RSA, RC4, DES, 3DES, SHA, AES, and Suite B algorithms.


The RomXML AE toolkit is a small eXtensible Markup Language (XML) implementation that enables your embedded device to send (frame) and receive (parse) XML documents. Using XML in your embedded designs provides for free-format interchange of data and is widely accepted in the device management, remote sensing, and enterprise IT communities. Allegro’s RomXML AE has been designed from the ground up for use in embedded devices that often have limited resources. Written in ANSI-C, the toolkit offers built-in capabilities to convert internal data between C language structures and XML documents. The RomXOAP AE toolkit builds upon the capabilities of RomXML AE and offers design engineers a comprehensive solution for creating connectivity between embedded designs and enterprise IT environments utilizing standards-based SOAP technology. Available as stand-alone toolkits or tightly integrated with the other RomPager AE suite of products, RomXML AE and RomXOAP AE provide the foundation for enabling embedded devices with XML, SOAP, XML-RPC, REST, and Web Services capabilities.


The RomCLI AE toolkit is used to build Command Line Interfaces (CLI) similar to Cisco IOS-based products. The RomCLI AE toolkit includes the CliBuilder offline compiler for preparing command definitions along with RomTelnet, a Telnet server, and RomConsole supporting serial communications. A unique variable access structure allows your embedded development team to use the same access functions for RomPager AE, RomCLI AE, and SNMP. Because security is always a concern when connecting embedded devices to a network, RomCLI AE is often used in conjunction with RomSShell AE to provide a Secure Shell interface for device management.

RomSShell AE

RomSShell is an embedded Secure Shell version 2 (SSH) toolkit. SSH provides encrypted communications between hosts over an insecure network. RomSShell offers a range of client authentication options in addition to X.509 public-key certificates. RomSShell can also be used for port forwarding (sometimes called SSH tunneling), allowing you to arbitrarily tunnel secure TCP connections. RomSShell AE also supports the latest RFCs for implementing Suite B with Secure Shell.


RomCert is a platform-independent implementation of the Online Certificate Status Protocol (OCSP) and the Simple Certificate Enrollment Protocol (SCEP) and makes embedding security certificate management into resource sensitive embedded systems and consumer electronics fast, easy, and reliable while decreasing time to market.

ACE – Allegro Cryptography Engine

Allegro’s suite of Embedded Device Security toolkits makes embedding standards-based security protocols into resource sensitive embedded systems and consumer electronics fast, easy and reliable. The ACE (Allegro Cryptography Engine) toolkit is a cryptographic library module specifically engineered to meet the critical needs of embedded computing systems in addition to fulfilling the requirements needed for FIPS 140-2 level 2 validation. The module provides embedded systems developers with a common software interface to enable bulk encryption and decryption, message digests, digital signature creation and validation, and key generation and exchange. Suite B is an advanced standard for cryptography that defines algorithms and strengths for encryption, hashing, calculating digital signatures, and key exchange. ACE includes a platform independent, government validated implementation of the NSA Suite B defined suite of cryptographic algorithms.

Embedded FIPS 140-2 Cryptography

FIPS 140-2 Level 2 Logo

The Allegro Cryptography Engine (ACE) is a platform independent, high performance, resource sensitive, embedded  FIPS 140-2 Validated cryptography engine specifically engineered for the rigors of embedded computing. ACE enables OEM manufacturers to add sophisticated FIPS approved encryption technology to their designs and dramatically speed the development cycle. The ACE cryptography library is designed to meet the requirements needed for FIPS 140-2 validation.


Embedded systems are appearing in virtually all industries with the capability to communicate independently. The rapid adoption and deployment of modern communication technologies have enabled new applications in healthcare, military applications, energy management, consumer devices and many other areas. With these capabilities, comes the need for embedded device security. Any network-enabled device must be considered as a potential target for malicious intent. Encryption of sensitive data while in motion or at rest is a key component to thwarting malicious attacks and reducing risk.

ACE is a cryptographic library module for embedded computing systems that provides validated software implementations of FIPS-approved algorithms for the calculation of message digests, digital signature creation and verification, bulk encryption and decryption, key generation and key exchange. Used stand-alone or pre-integrated with Allegro's Secure IoT Suite, ACE provides CAVP validated implementations of sophisticated FIPS approved encryption algorithms for use in embedded systems. In 2005, the National Security Agency (NSA) defined a set of cryptographic algorithms that when used together, are the preferred method for assuring the security and integrity of information passed over public networks such as the Internet. Today, Suite B is globally recognized as an advanced standard for cryptography that defines algorithms and strengths for encryption, hashing, calculating digital signatures and key exchange. ACE includes a platform independent, CAVP validated implementation of the NSA Suite B defined suite of cryptographic algorithms. ACE is delivered as ANSI C source.

Securing Data In Motion

Many IoT applications often collect and correlate valuable sensitive information at the edge of the Internet and routinely transmit it to servers in the cloud securely. TLS and DTLS are the “defacto” standards for keeping data secure when communicating with servers in the cloud. Allegro’s RomSTL, embedded TLS, and DTLS toolkit, tightly integrates FIPS validated cryptography with a standards-based, embedded implementation of TLS/DTLS to keep your data secure while in motion. RomTLS is additionally integrated to make use of ACE’s support of Suite B algorithms (RFC 6460).

Securing Data At Rest

Allegro’s secure data-at-rest solution is tightly integrated with ACE validated FIPS 140-2 cryptography. Before offloading data to cloud-based applications, any sensitive information stored by IoT devices faces numerous threats and risks of unintentional exposure. Adding data encryption to the transmission process has been the traditional method for reducing this risk. However, simply encrypting data transmissions doesn’t fully address many of the threats aimed at recovering small segments of data or potentially the entire collection. Allegro's Secure IoT Suite provides IoT design engineers the ability to proactively address the threat surface created when storing sensitive data on persistent media. Rather than encrypting data at a volume or drive level where exposing a single set of keys potentially compromises a significant amount of sensitive data, Allegro’s secure data-at-rest solution encrypts information at the file level.

ACE can be used stand-alone or pre-integrated with Allegro’s Secure IoT Suite.

TM: A Certification Mark of NIST, which does not imply product endorsement by NIST, the U.S. or Canadian Governments



Digital Signature Algorithms

  • RSA (FIPS 186-4) Key lengths: 2048, 3072
    • Padding Modes: ANSI X9.31, PKCS #1v1.5, PSS
  • DSA (FIPS 186-4) Key lengths: 2048, 3072
  • ECDSA (FIPS 186-4) Curves: NIST P-224, P-256, P-384, P-521

Symmetric Keys

  • AES Key lengths: 128, 192, 256
    • Modes: ECB, CBC, CTR, CFB1, CFB8, CFB128, OFB, CCM
  • AES-GCM Key lengths: 128, 192, 256
  • AES-XTS Key lengths: 128, 256
  • TripleDES
    • Modes: ECB, CBC, CFB1, CFB8, CFB64, OFB

Hash Functions

  • SHA-1
  • SHA-224
  • SHA-256
  • SHA-384
  • SHA-512
  • SHA3-224
  • SHA3-256
  • SHA3-384
  • SHA3-512

Message Authentication

  • HMAC-SHA-1
  • HMAC-SHA-224
  • HMAC-SHA-256
  • HMAC-SHA-384
  • HMAC-SHA-512
  • AES-GMAC Keylengths: 128, 192, 256
  • AES-CMAC Keylengths: 128, 192, 256

Key Agreement

  • DH (NIST SP 800-56A)
  • ECDH Curves: NIST P-224, P-256, P-384, P-521

Key Derivation

  • Password-Based Key Derivation Function 2 (PBKDF2)
  • TLS Key Derivation Functions

Random Number Generator

  • DRBG (NIST SP 800-90B)


ACE - Non-FIPS Mode

All of the above in addition to the following:


Digital Signature Algorithms

  • RSA: arbitrary key lengths 1024, 2048, 3072
  • DSA: arbitrary key lengths 1024, 2048, 3072

Symmetric Keys

  • DES
  • RC4

Hash Functions

  • MD2
  • MD4
  • MD5

Message Authentication

  • HMAC-MD5





Small code footprint

More resources available for application features

ANSI C Source Code Distribution

Broad processor architecture support, eases porting and support

Processor, RTOS and TCP/IP stack agnostic

Allegro's products will work with new or existing hardware and software designs

Flexible Security and External Security support

Use software encryption or if available make use of hardware cryptography acceleration

Compilation switches for size, feature and speed trade-offs

Allows the development team to optimize for system resources

Supported RFCs

System Requirements

  • Processor Architecture - Works with any 16-bit, 32-bit or 64-bit processor
  • Operating System(OS) - Works with any OS vendor and will function without an OS if needed
  • Compiler - ANSI C

NIST CVMP Validation Reference

FIPS 140-2 Level 2 Logo

Validated FIPS FIPS 140-2 Cryptographic Modules


Certificate Number Status NIST Link
3432 Active NIST Reference
2966 Active NIST Reference
2048 Historical NIST Reference

CAVP Validation References


AES Validation

Validation Number Date
AES 5574 7/27/2018
AES 5573 7/27/2018
AES 4121 10/14/2016
AES 2671 11/8/2013
AES 2314 1/18/2013
AES 2271 11/15/2012


DSA Validation

Validation Number Date
DSA 1116 10/14/2016
DSA 810 11/8/2013
DSA 728 1/18/2013
DSA 708 11/15/2012


RSA Validation

Validation Number Date
RSA 3000 7/27/2018
RSA 2999 7/27/2018
RSA 2227 10/14/2016
RSA 1374 11/8/2013
RSA 1197 1/8/2013
RSA 1164 11/15/2012


ECDSA Validation

Validation Number Date
ECDSA 1505 7/27/2018
ECDSA 1504 7/27/2018
ECDSA 936 10/14/2016
ECDSA 465 11/8/2013
ECDSA 379 1/18/2013
ECDSA 367 11/15/2012



Validation Number Date
TDES 2251 10/14/2016
TDES 1602 11/8/2013
TDES 1459 1/18/2013
TDES 1418 11/15/2012


SHA Validation

Validation Number Date
SHS 4478 7/27/2018
SHS 4477 7/27/2018
SHS 3390 10/14/2016
SHS 2243 11/8/2013
SHS 1997 1/8/2013
SHS 1952 11/15/2012


ECC Component Validations

Validation Number Date
Component 2005 7/27/2018
Component 2004 7/27/2018
Component 927 10/14/2016
Component 148 11/8/2013
Component 50 1/8/2013
Component 43 11/15/2012


DRBG Validation

Validation Number Date
DRBG 2224 7/27/2018
DRBG 2223 7/27/2018
DRBG 1241 10/14/2016
DRBG 430 11/8/2013
DRBG 286 1/8/2013
DRBG 279 11/15/2012


SHAKE/SHA-3 Validation

Validation Number Date
SHA-3 8 7/27/2018


KDF TLS Validation

Validation Number Date
Component 2062 9/7/2018
Component 2061 9/7/2018
Component 1074 1/27/2017


KAS FFC Validation

Validation Number Date
Component 927 10/14/2016
Component 148 11/8/2013
Component 43 11/15/2012


KAS ECC Validation

Validation Number Date
Component 2005 7/27/2018
Component 2004 7/27/2018
Component 927 10/14/2016
Component 148 11/8/2013
Component 50 1/8/2013
Component 43 11/15/2012


HMAC SHA2 Validation

Validation Number Date
HMAC 3715 7/27/2018
HMAC 3714 7/27/2018
HMAC 2692 10/14/2016
HMAC 1661 11/8/2013
HMAC 1430 1/8/2013
HMAC 1390 11/15/2012


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