一种针对密钥的单比特电磁模板攻击方法

旁路信息泄露是安全设备面临的一种严重威胁,通过检测包括电磁在内的任何一种旁路,都可能提取密钥信息。提出一种通过被动的监视和利用数据加密标准(DES)密码芯片的电磁泄漏来获取密钥的单比特电磁模板攻击方法。该方法与传统的模板攻击相比有三点显著的不同:一是直接以密钥为攻击目标而不是密钥的算法置换;二是为单比特建立模板而不是多个比特;三是不需要已知明文或密文。针对DES加密方案的实验结果确认了这种方法在密码分析中的有效性。

Single bit electromagnetic template attack aiming at key

Side channel leakage is a serious threat to secure devices.Cryptographic information extraction is possible after examining any one of the various side channels, including electromagnetic.A single bit electromagnetic template attack method to achieve such a purpose is proposed to extract encryption keys from cipher chips performing data encryption standard(DES)by passively monitoring and exploiting unintentional radio frequency(RF)emissions.It is similar to traditional template attacks with three notable exceptions.First,it directly targets the encryption key instead of algorithmic permutations the encryption key.Second,it creates templates for single bit rather than multiple bits.Third,plaintext or ciphertext are not necessary for this method.The results regarding the DES encryption scheme confirms the effectiveness of the method in cryptanalysis.