WASHINGTON -- After delaying a domestic satellite-surveillance program for more than two months, Homeland Security Secretary Michael Chertoff expects to finalize a new charter for it this week, a move that attempts to quell civil-liberties concerns and get the program back on track.

Mr. Chertoff also plans soon to unveil a cyber-security strategy, part of an estimated $15 billion, multiyear program designed to protect the nation's Internet infrastructure. The program has been shrouded in secrecy for months and has also prompted privacy concerns on Capitol Hill because it involves government protection of domestic computer networks.

Both areas put Homeland Security in the middle of a public debate over domestic spy powers, kicked off by the revelation two years ago that the National Security Agency had been eavesdropping on some conversations in the U.S. without a warrant. In the fall, the department put the satellite program on hold after an outcry on Capitol Hill. Lawmakers have also asked Mr. Chertoff to delay the introduction of the cyber-security initiative. "One lesson I've learned is it's not enough to say we know what we're doing is going to be OK," Mr. Chertoff said in an interview. "We've got to really make it clear to the public that we're doing this, but we're not doing that."

The satellite program, which would be run by a new department branch called the National Applications Office, would expand the domestic use of satellite imagery by federal and local authorities.

Congress lashed out at the department when The Wall Street Journal reported plans for the program in August. Mr. Chertoff suspended the program until legislators received more information. The satellite-spy technology was originally developed to monitor activities and people outside the U.S.