Her committee, she said, addresses "the desire of the families of loved ones abducted to Gaza to know as much as possible".
Since the truce expired, Israeli authorities have declared six civilians and an army colonel dead in captivity.
It has previously said dozens of hostages were killed in Israeli airstrikes, has threatened to execute hostages itself and suggested that some hostages were in the hands of other armed Palestinian factions.
Additional considerations have been hostages' rough handling by captors, the reduced chances of them getting adequate medical care in Gaza and accounts of deaths by former fellow hostages.
The military has recovered the bodies of one captive soldier and two civilian hostages, and freed one soldier in a rescue operation.
Persons:
Janis Laizans, Hagar Mizrahi, Israel's Kan, Mizrahi, Emily Hand, Tom, Shaked, Sigalit, Dan Williams, Howard Goller, Alison Williams
Organizations:
REUTERS, Rights, Health Ministry, Hamas, Thomson
Locations:
Gaza, Tel Aviv, Israel, remarrying