Secure key computation, encryption, decryption, signature and verification functionalities compliant with the PKCS#1

Overview

The Software RSA library provides standardized key computation, encryption, decryption, signature and verification functionalities for all key sizes up to 8192 bits. It is fully compliant with the RSA cryptosystem as defined in PKCS#1.

The Software RSA library is highly customizable: each high-level functions can be withdrawn so as to minimize the code size; the core modular exponentiation is based on the “sliding window” algorithm so that the best performance-memory tradeoff can be achieved by tuning the window size. This library embeds state-of-the-art countermeasures against side-channel attacks (SPA, DPA & DFA). Furthermore, the library performances can be significantly enhanced through the optional Public Key Cryptographic Coprocessor (PK2C).

Key Features

key generation, encryption, decryption, signature and verification functions
fully compliant with the PKCS#1 standards
all key sizes supported up to 8192 bits
core functions ASM-optimized for the targeted processor
configurable architecture: adjustable trade-off between performance and RAM footprint; dedicated coprocessor available separately (about 10 times faster)
state-of-the-art countermeasures against SPA, DPA and DFA attacks
typical code size on Cortex-M3 smaller than 15 kbytes
less than 100 Mcycles to compute a secure 2048-bit RSA signature

Benefits

PKCS#1 compliant
All key sizes up to 8192 bits
Hardened against SCA
ASM-optimized
Silicon proven

Deliverables

C and Assembly source codes
C test vectors
compilation scripts (makefile)
design specification
documents for certifications (FIPS, CC, EMV…): complete list of countermeasures with references; implementation details

Technical Specifications

Maturity

Silicon proven

Availability

Available

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