This is a draft cheat sheet. It is a work in progress and is not finished yet.
GSM (Global System for Mobile communication)
GSM encryption ciphers |
A5/0: No encryption |
A5/1: Based on LFFRs (Linear Forward Shift Register), developed first, stronger and used in Europe and US, broken with known-plaintext attack |
A5/2: Weakened A5/1, broken with real-time ciphertext-only attack |
A5/3: KASUMI, new for 3G. A block cipher vulnerable to impossible differential attack and man-in-the-middle protocol attacks. |
Deliberately weak cipher designs due to cost and politics.
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Using the right primitives
Using the wrong crypto or homebrew crypto is bad (e.g. RC4 in WEP and TLS) |
Sometimes people use the right ones wrong (e.g. seeing the penguin, AES-ECB) |
Right crypto stop being right (e.g. MD5 and SHA1 broken) |
Quantum computer poses a huge threat |
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