How do I compress and encrypt stored data in Swift?

In Swift, you can compress and encrypt data using various libraries and frameworks. Below is a simple example that demonstrates how to achieve this using the `zlib` library for compression and `CryptoKit` for encryption.

Example of Compressing and Encrypting Data in Swift

import CryptoKit import Foundation // Function to compress data func compressData(_ data: Data) -> Data? { var compressedData = Data(count: data.count) let compressedSize = compressedData.withUnsafeMutableBytes { compressedBytes in return data.withUnsafeBytes { sourceBytes in compress(compressedBytes.baseAddress!.assumingMemoryBound(to: UInt8.self), &compressedSize, sourceBytes.baseAddress!.assumingMemoryBound(to: UInt8.self), data.count) } } guard compressedSize != 0 else { return nil } return compressedData.prefix(compressedSize) } // Function to encrypt data func encryptData(_ data: Data, key: SymmetricKey) -> Data { let sealedBox = try! AES.GCM.seal(data, using: key) return sealedBox.combined! } // Example usage let originalData = "Hello, secure world!".data(using: .utf8)! let key = SymmetricKey(size: .bits256) // Generate a random key if let compressedData = compressData(originalData) { let encryptedData = encryptData(compressedData, key: key) print("Encrypted and compressed data: \(encryptedData.base64EncodedString())") }

compress data encrypt data Swift encryption data security

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