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@@ -6,7 +6,12 @@
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// This file demonstrates how to implement custom ORAM wide cell types.
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// Such types can be structures of arbitrary numbers of RegAS and RegXS
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-// fields.
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+// fields. The example here imagines a cell of a binary search tree,
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+// where you would want the key to be additively shared (so that you can
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+// easily do comparisons), the pointers field to be XOR shared (so that
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+// you do easily do bit operations to pack two pointers and maybe some
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+// tree balancing information into one field) and the value doesn't
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+// really matter, but XOR shared is usually slightly more efficient.
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struct Cell {
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RegAS key;
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