 For the NESSIE call for new cryptographic primitives, three new versions called the t-class were developed; SOBER-t8 was virtually identical to SOBER-2 but did not have sufficient design strength for NESSIE submission; SOBER-t16 and SOBER-t32 were submitted.t32 was a further expansion to 32-bit words, while both ciphers had a more efficient method of computing the linear feedback.Subsequent to NESSIE, SOBER-128 was designed to take into account what had been learned.