Lecture notes
contents
Security and encryption
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Cipher text →
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Encryption / Decryption →
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Caesar cipher → shift all the letters in the text by some number (key) of characters
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Steganography → Hiding information in plain sight
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Symmetric cryptography
- Encrypts and decrypts the message with the same key
- AES → Standard for cryptography and communication
- Secrecy
- Integrity
- Authenticity
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Breaking encryption
- Brute force
Misconception vs Reality
Passwords
Viruses and malware
Other common attacks
Key takeaways
- a