應用於高級加密標準以環形振盪器為基礎的對抗電路

Abstract

在我們日常生活中，網路與電子產品的使用日益頻繁。這些產品可能會傳送 個人或重要的資訊，而這些資訊需要被保護。高級加密標準被選擇用來確保資料 更加的安全。不過沒有保護的高級加密標準容易被差分能量分析攻擊法所攻擊。 攻擊者可以藉由分析加密設備的能量消耗來竊取加密設備的金鑰。因為高級加密 標準有這樣的弱點，有很多的方法被提出來改善以抵抗差分能量分析攻擊法，但 是這些方法往往會造成很大的硬體代價。低硬體代價的對策電路非常適合使用在 低成本的應用上。例如：智慧卡、無線射頻識別系統或者移動醫療保健。在這篇 論文中，他結合了環形振盪器與亂數產生器以減少面積的代價，藉由控制需要被 保護的時間來減少能量的消耗。

The internet and electronic devices are used more frequently in our daily life. These applications transport some information which may contain personal or important information that is required to be secret. In order to make the information safer, the AES is chosen to ensure the security. However, an unprotected AES is vulnerable to the side-channel attack such as differential power analysis attack. The attacker can reveal the secret key by analyzing the power consumption of the cryptographic device. There are many methods to resist the DPA attack but these methods require large hardware cost. The countermeasure with low hardware cost is very suitable for low cost application such as smart card, RFID or mobile healthcare. In this thesis, it combines the random source and the ring oscillator together to reduce the area overhead and control the protect time to reduce the power consumption.