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Spongy Castle is a package-rename (org.bouncycastle.* to org.spongycastle.*) of Bouncy Castle intended for the Android platform. Android unfortunately ships with a stripped-down version of Bouncy Castle, which prevents easy upgrades - Spongy Castle overcomes this and provides a full, up-to-date version of the Bouncy Castle cryptographic libs.

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package org.spongycastle.math.ec;

/**
 * Class holding precomputation data for the WTNAF (Window
 * τ-adic Non-Adjacent Form) algorithm.
 */
public class WTauNafPreCompInfo implements PreCompInfo
{
    /**
     * Array holding the precomputed ECPoint.AbstractF2ms used for the
     * WTNAF multiplication.
     */
    protected ECPoint.AbstractF2m[] preComp = null;

    public ECPoint.AbstractF2m[] getPreComp()
    {
        return preComp;
    }

    public void setPreComp(ECPoint.AbstractF2m[] preComp)
    {
        this.preComp = preComp;
    }
}