The Obama administration is moving toward reviving the military commission system for prosecuting Guantánamo detainees, which was a target of critics during the Bush administration, including Mr. Obama himself.

Officials said the first public moves could come as soon as next week, perhaps in filings to military judges at the United States naval base at Guantánamo Bay, Cuba, outlining an administration plan to amend the Bush administration’s system to provide more legal protections for terrorism suspects.

Continuing the military commissions in any form would probably prompt sharp criticism from human rights groups as well as some of Mr. Obama’s political allies because the troubled system became an emblem of the effort to use Guantánamo to avoid the American legal system.

Officials who work on the Guantánamo issue say administration lawyers have become concerned that they would face significant obstacles to trying some terrorism suspects in federal courts. Judges might make it difficult to prosecute detainees who were subjected to brutal treatment or for prosecutors to use hearsay evidence gathered by intelligence agencies.