The long-word and very long-word addition required in cryptography applications generally requires custom hardware support provided by ASICs or application-specific instructions in ASIPs. As an alternative to these expensive solutions, FPGAs have been used. To reduce the overhead of commercial FPGAs in implementing cryptography, CryptoRA, a cryptographically-oriented reconfigurable array, has recently been proposed. This paper presents a circuitlevel implementation of the CryptoRA array which provides