In this video, learn how to create a class that can be used for symmetric key cryptography.
- [Instructor] The KeychainFacade class can generate…the private and the public key pair.…These keys are required for asymmetric encryption.…Next, we're going to implement the encryption feature.…I start by declaring the encrypt method.…Let's scroll down.…The method has a single parameter of type string.…This is our input to be encrypted.…The method returns an optional data,…and it might throw an error.…
We need the public key for asymmetric encryption.…We can't proceed if there is no public key,…so I need to make sure it exists.…That's why I use the guard statement,…guard let security key equals publicKey, else,…we need to throw an error.…We'll need a dedicated error for the case…when there is no public key.…I'm going to define a new error case called noPublicKey.…
Let's scroll up to the KeychainFacade error,…and I'll add the new case, case noPublicKey.…Now, let's complete the guard block.…Throw KeychainFacadeError.noPublicKey.…The next step is about choosing an asymmetric algorithm.…I define the constant, let algorithm.…
Author
Released
10/26/2018- Encryption, code signing, and sandboxing
- Preventing pasteboard leakage with and without coding
- Working with the keychain
- File data protection
- Securing apps using biometrics
- Implementing Touch ID and Face ID
- Performing asymmetric encryption and decryption
Skill Level Intermediate
Duration
Views
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Introduction
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Keeping your apps secure1m 13s
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What you should know1m 21s
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1. iOS Security Fundamentals
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Security in iOS1m 2s
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The Secure Boot1m 34s
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Touch ID and Face ID1m 42s
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Code signing1m
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Sandboxing53s
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User privacy41s
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2. User Data Protection
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Purpose strings2m 7s
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The pasteboard spy app2m 24s
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Hacking the UserDefaults4m 40s
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3. The Keychain
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Using the Keychain wrapper4m 31s
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4. File Data Protection
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5. Securing Apps Using Biometrics
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Implementing Touch ID2m 51s
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Implementing Face ID4m 57s
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6. Cryptographic APIs/Interfaces
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Creating the private key5m 49s
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Conclusion
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Next steps50s
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Video: Performing asymmetric encryption