1. Reactive Android Development
CS T & CS T
Summer 2016
Encryption

2. Early Encryption Techniques
Caesar Cipher
Pick an offset and add that to the letters of the text
Say 4
A-> E
B-> F
Z -> D

3. Public Key Encryption KeyPair
One for encoding
One for decoding
Knowing the public key isn't* enough to compute the private key
*assuming that one-way functions exist

4. Where to store you keys
Losing your house keys is bad

5. Where to store you keys Losing your house keys is bad
Losing you private key might actually be worse!

6. Where to store your keys
Keystore
Keeps your keys safe
Even from yourself
Purpose
Encryption
Decription
KeyInfo.IsInsideSecurityHardware()