Security and Communication Networks / 2018 / Article / Tab 2

Research Article

Practical Suitability and Experimental Assessment of Tree ORAMs

Table 2

Notations used for Ring ORAM.

NThe total number of leaves
LThe height of the tree
ZThe number of real blocks in each bucket
SThe number of dummy blocks in each bucket
Path(x)The path from leaf node x to the root
Path(x, i)The bucket at level i on path x
GetPath(x,a)Read the path x looking for block with address a
StThe client’s local stash
PMapThe position map stored on the client
x≔PMap[a]Block a is assigned to leaf node x
EvPath()Evict path
ShuffPath(x)Shuffle the buckets on path x
offs The offset of a block stored in a bucket
block[offs]The block stored in the bucket at offset offs
RBuck(i)Read a complete bucket i
WBuck(i, y)Write bucket i with the contents from y
URandUniform Random distribution
GetBOffs(Path(x,i),a)Gets the block offset of the block with address a on path x on level i.

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