Practical Suitability and Experimental Assessment of Tree ORAMs

Table 1

Notations used for Path ORAM.

N	The total number of buckets and data blocks
L	The height of the tree
Z	The size of each bucket in blocks
Path(x)	The path from leaf node x to the root
Path(x, i)	The bucket at level i on path x
St	The client’s local stash
PMap	The position map stored on the client
x≔PMap[a]	Block a is assigned to leaf node x
RBuck(i)	Read a complete bucket i
WBuck(i, y)	Write bucket i with the contents from y
URand	Uniform Random distribution