/**
 * Encryption Module for Sensitive Data
 * Uses AES-256-GCM for encrypting configuration files
 */
/**
 * Encrypt data
 */
export declare function encrypt(plaintext: string): string;
/**
 * Decrypt data
 */
export declare function decrypt(ciphertext: string): string;
/**
 * Check if data is encrypted (base64 format)
 */
export declare function isEncrypted(data: string): boolean;
/**
 * Encrypt a JSON object
 */
export declare function encryptJson(obj: any): string;
/**
 * Decrypt to JSON object
 */
export declare function decryptJson(ciphertext: string): any;
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