APPARATUS AND METHODS TO HIDE POWER SIGNATURE IN CRYPTOGRAPHIC CIRCUITS
摘要
<p>A cryptographic device (200) reduces risk of external analysis of power consumed by an encryption circuit (206) by maintaining a substantially current draw on an external power input node (Nl) during operation. An active shunt current regulator (208) draws current to ground when not drawn by the encryption circuit (206). A low-pass filter (202) and a linear voltage regulator (204) smoothes power spikes and keeps power supply voltage constant at an input to the encryption circuit (206).</p>
申请公布号
WO2013110055(A1)
申请公布日期
2013.07.25
申请号
WO2013US22501
申请日期
2013.01.22
申请人
TEXAS INSTRUMENTS INCORPORATED;TEXAS INSTRUMENT JAPAN LIMITED