- made by the Germans, WWII brought a need for more secure messages, built on the complexity of the currently available substitution ciper machines. - a way of scrambling data so that only authorized parties can understand the information The purpose of encryption is confidentiality - concealing the content of the message by translating it into a code.

Why can it be inferred that Scythian tribe members vere strong and brave? A They lived in the mountains of Southern Siberia. B They hunted both real and imaginary beasts. They endured pain to get full-body tattoos. They preferred tattoos with complex designs.

What should you do if you are a victim of cyberbullying? A. Respond to the bully B. Keep a record of messages received (print or take screenshots) C. Reach out to parents, teachers, counselors, and school administrators D. Block communication from the bully (if possible) O A only B A, B, C and D B B, C, and D B and C

If \( z_{1}=5+9 i \) and \( z_{2}=8-3 i \), find: 1. (2) \( z_{1} \cdot z_{2} \) a. \( z_{1}+z_{2} \) b. \( z_{1}-z_{2} \)

Cryptography is defined as: The practice of encoding information so only authorized people can read it 1 Sensitive information sent over networks that needs to be secured Verified authority to view information, such as a password or key The act of stealing personal information online

De acordo com sua visão, qual é a importância social dos trabalhos desenvolvidos de forma vo- luntária por ONGs como a Anjos da Noite? Justi- fique sua resposta.