/**
 * Represents a class that applies AES256GCM to data.
 *
 */
export declare class Aes256Gcm {
    SYMMETRIC_KEY_LENGTH: number;
    static encrypt(plaintext: string | Uint8Array, key: string | Uint8Array, nonce: string | Uint8Array, authenticatedData: string | Uint8Array): Uint8Array;
    static decrypt(plaintext: string | Uint8Array, key: string | Uint8Array, nonce: string | Uint8Array, authenticatedData: string | Uint8Array): Uint8Array;
}
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