短語詞組短語deniable encryption 可拒加密;可否定加密Deniable Ring Signature 可否認(rèn)環(huán)簽名concurrent deniable authentication 并行可否認(rèn)認(rèn)證deniable authentication protocol 可否認(rèn)認(rèn)證方案 返回 deniable