1. In what ways do national security and individual privacy sometimes conflict?

National security and individual privacy can conflict when questions are raised of an individual’s first amendment rights. For example: if someone has incriminating information on their phone/computer that might have been involved in a criminal case where national security is at risk, but the authorities can’t go on that phone due to individual privacy.

2. What does it mean to say that the government would like to have a back door to the encrypted data on a mobile phone?

To say that the government would like to have a back door to the encrypted data on a mobile phone, means that the government would like to have access to this information without infringing upon any privacy issues.

3. How do you know that an encrypted web transaction is taking place when you visit a website?

You do not know that an encrypted web transaction is taking place when you visit a website.

4. What is the Bitcoin payment system and how does it work? Be sure to include how it uses cryptography.

Bitcoin is a cryptocurrency and worldwide payment system. Bitcoin is the first known decentralized digital currency, as it works without a central repository or single administrator (anonymous).