Can you name popular data encryption methods?

Popular data encryption methods commonly used in iOS and other platforms include:

• AES (Advanced Encryption Standard): symmetric block cipher widely used for data protection.
• RSA: asymmetric encryption algorithm used for key exchange and digital signatures.
• ChaCha20: modern symmetric stream cipher, often used as an alternative to AES.
• SHA (Secure Hash Algorithm): family of hash functions (SHA-1, SHA-256, etc.) used for creating hashes, not encryption, but often used in cryptography.
• PBKDF2, bcrypt, scrypt: algorithms for secure password hashing with salt and iterations.

In iOS, encryption is often implemented using CommonCrypto or CryptoKit, which provide implementations of AES, SHA, and other algorithms.

Example of AES usage with CryptoKit:

import CryptoKit

let key = SymmetricKey(size: .bits256)
let data = "Hello".data(using: .utf8)!

let sealedBox = try! AES.GCM.seal(data, using: key)
let ciphertext = sealedBox.ciphertext