Canadian security vendor Certicom is expected to accept Research in Motion's US$106.5 million takeover offer today, ending a bidding war between the BlackBerry maker and security player VeriSign.

The battle prompted RIM last week to top its initial, unsolicited offer, originally made in December -- a hostile takeover that Certicom initially resisted and ultimately won a court injunction to stop.

In the interim, VeriSign emerged as a second potential suitor and succeeded in signing a merger agreement with Certicom for US$73 million. However, in the face of RIM's newest offer, VeriSign (NASDAQ: VRSN) said today that it's dropping out of the running.

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