sidechannel noun2 •A small branch from the main flow of a river, hydraulic system, or electronic circuit.Juvenile growth and survivorship is likely to be reduced by cumulative losses of pool volume and sedimentation of shallow rearing areas such as stream margins and sidechannels. — 2001 •An indirect source of information about what a system is doing, such as execution time, version number, etc.VLSI circuits are open to sidechannel attacks which disclose information about its internal state to an adversary. — 2005 formssidechannels
