/**
 * Mask a sensitive value
 * Shows first 4 chars and last 4 chars with *** in between
 */
export declare function maskSensitiveValue(value: string): string;
/**
 * Mask sensitive values in an object based on key names
 */
export declare function maskSensitiveData<T extends Record<string, any>>(data: T): Record<string, string>;
/**
 * Check if value should be masked (for display purposes)
 */
export declare function shouldMaskValue(key: string, value: string): boolean;
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