She also said the police's stop-and-search powers would be curbed and the effort to deport foreign nationals involved in terrorist activity would be increased.
Delegates applauded when she said "stop forms" - used when people are stopped in the street - would be scrapped and the stop-and-search procedures simplified.
The figures also show that the use by the Metropolitan Police of stop-and-search powers where there is a suspicion of terrorist-related activity has fallen by just under half.
The gangs taskforce in Lambeth said using stop-and-search tactics they would track down the offender in about three or four cases in 10 - although the phone was not always recovered.
In February, Met Police Commissioner Sir Ian Blair vowed to review the use of terror stop-and-search powers after a Metropolitan Police Authority report said it was causing "untold damage" to certain communities.
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The powers allow officers to stop and search people in certain areas, even when there is no direct suspicion of involvement in terrorism-related activity.