export declare class SystemKeyring {
    private static instance;
    private browserKeyring;
    private constructor();
    static getInstance(): SystemKeyring;
    storeKey(id: string, data: Uint8Array, password: string): Promise<void>;
    retrieveKey(id: string, password: string): Promise<Uint8Array>;
    initialize(): Promise<void>;
    rotateKey(id: string, oldPassword: string, newPassword: string): Promise<void>;
}
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