A semiconductor and IP products firm has purchased mobile payments specialist Bell ID. Terms were not disclosed. The buyer is Rambus Inc., a company formed 25 years ago to create technology that managed the bandwidth between processor and memory chips. Rambus subsequently moved into related businesses, including purchasing Cryptography Research, a security management firm, in 2011. The acquisition of Bell ID signals its continued effort at diversification. Bell ID will be part of Rambus’s Cryptography Research division, which offers a variety of security-related products and services incl...