Metropolitan Police Deputy Assistant Commissioner Stuart Cundy said in a court statement that there would be less support for "anti-police violence" if full details were released.
He said that while the majority of protests following the verdict would be peaceful, there was the chance of disorder being caused by a small number of people hostile to the police.
Mr Kaba's family have stressed that they wish any demonstrations in support of their son to remain peaceful.
The Met will have to deal with three protests due to take place in central London on Saturday, one organised by United Families and Friends Campaign, with supporters of the justice campaign for Chris Kaba encouraged to attend.
One other unrelated demonstration is being held by supporters of Tommy Robinson, who has returned to the UK from Cyprus despite a warrant being issued for his arrest.
And Stop the War campaigners are also set to gather in opposition to Robinson, whose real name is Stephen Yaxley-Lennon.
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