/**
 * Entropy-based secret detection
 * Uses Shannon entropy to detect high-entropy strings that may be secrets
 */
/**
 * Entropy analysis result
 */
export interface EntropyAnalysis {
    /** Shannon entropy in bits per character */
    entropy: number;
    /** Is this a high-entropy string? */
    isHighEntropy: boolean;
    /** Confidence score (0-100) */
    confidence: number;
    /** Reason for the result */
    reason: string;
}
/**
 * Calculate Shannon entropy of a string
 * @param str - String to analyze
 * @returns Entropy in bits per character
 */
export declare function calculateEntropy(str: string): number;
/**
 * Check if string matches a whitelisted high-entropy pattern
 * @param str - String to check
 * @returns True if whitelisted
 */
export declare function isWhitelistedHighEntropy(str: string): boolean;
/**
 * Analyze entropy of a string to determine if it's likely a secret
 * @param str - String to analyze
 * @returns Entropy analysis result
 */
export declare function analyzeEntropy(str: string): EntropyAnalysis;
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