Fremont, Calif.-based ActivIdentity on Monday acquired CoreStreet to complement its strong authentication and credential management solution portfolio. Under the $20 million deal, ActivIdentiy will gain Cambridge, Mass.-based CoreStreet's public key infrastructure certification (PKI) technology, distributed identity credential validation system and physical access control products, according to a news release. The two vendors already had been partnering to offer combined solutions for government and enterprise customers. — DK