diff --git a/.github/workflows/android.yml b/.github/workflows/android.yml
index e0fece0d..ddf8aafe 100644
--- a/.github/workflows/android.yml
+++ b/.github/workflows/android.yml
@@ -5,6 +5,7 @@ on:
     branches: [ main ]
   pull_request:
     branches: [ main ]
+  workflow_dispatch: # allow manually-triggered runs
 
 jobs:
   build:
diff --git a/.github/workflows/linux.yml b/.github/workflows/linux.yml
index 260044f1..458afb5a 100644
--- a/.github/workflows/linux.yml
+++ b/.github/workflows/linux.yml
@@ -5,6 +5,7 @@ on:
     branches: [ main ]
   pull_request:
     branches: [ main ]
+  workflow_dispatch: # allow manually-triggered runs
 
 jobs:
   build:
diff --git a/.github/workflows/macos.yml b/.github/workflows/macos.yml
index d2a57116..f3efa334 100644
--- a/.github/workflows/macos.yml
+++ b/.github/workflows/macos.yml
@@ -5,6 +5,7 @@ on:
     branches: [ main ]
   pull_request:
     branches: [ main ]
+  workflow_dispatch: # allow manually-triggered runs
 
 jobs:
   build:
diff --git a/Package.swift b/Package.swift
index 06d9ed47..86aec4e4 100644
--- a/Package.swift
+++ b/Package.swift
@@ -14,7 +14,9 @@ let package = Package(
     )
   ],
   targets: [
-    .target(name: "CryptoSwift", resources: [.copy("PrivacyInfo.xcprivacy")]),
+    .target(name: "CryptoSwiftResources", resources: [ Resource.copy("PrivacyInfo.xcprivacy") ]),
+    .target(name: "CryptoSwift",
+            dependencies: [ .target(name: "CryptoSwiftResources", condition: .when(platforms: [ .iOS, .macOS, .tvOS, .watchOS, .macCatalyst, .visionOS ])) ]),
     .testTarget(name: "CryptoSwiftTests", dependencies: ["CryptoSwift"])
   ],
   swiftLanguageVersions: [.v5]
diff --git a/Sources/CryptoSwift/AEAD/AEADXChaCha20Poly1305.swift b/Sources/CryptoSwift/AEAD/AEADXChaCha20Poly1305.swift
index 7204baf7..1d9b23f9 100644
--- a/Sources/CryptoSwift/AEAD/AEADXChaCha20Poly1305.swift
+++ b/Sources/CryptoSwift/AEAD/AEADXChaCha20Poly1305.swift
@@ -13,7 +13,11 @@
 //  - This notice may not be removed or altered from any source or binary distribution.
 //
 
+#if canImport(FoundationEssentials)
+import FoundationEssentials
+#else
 import Foundation
+#endif
 
 /// This class implements the XChaCha20-Poly1305 Authenticated Encryption with
 /// Associated Data (AEAD_XCHACHA20_POLY1305) construction, providing both encryption and authentication.
diff --git a/Sources/CryptoSwift/ASN1/ASN1.swift b/Sources/CryptoSwift/ASN1/ASN1.swift
index a865ddd7..fd6c61dc 100644
--- a/Sources/CryptoSwift/ASN1/ASN1.swift
+++ b/Sources/CryptoSwift/ASN1/ASN1.swift
@@ -14,7 +14,11 @@
 //
 //  ASN1 Code inspired by Asn1Parser.swift from SwiftyRSA
 
+#if canImport(FoundationEssentials)
+import FoundationEssentials
+#else
 import Foundation
+#endif
 
 /// A Partial ASN.1 (Abstract Syntax Notation 1) Encoder & Decoder Implementation.
 ///
diff --git a/Sources/CryptoSwift/ASN1/ASN1Decoder.swift b/Sources/CryptoSwift/ASN1/ASN1Decoder.swift
index dfcb2258..b48658db 100644
--- a/Sources/CryptoSwift/ASN1/ASN1Decoder.swift
+++ b/Sources/CryptoSwift/ASN1/ASN1Decoder.swift
@@ -14,7 +14,11 @@
 //
 //  ASN1 Code inspired by Asn1Parser.swift from SwiftyRSA
 
+#if canImport(FoundationEssentials)
+import FoundationEssentials
+#else
 import Foundation
+#endif
 
 extension ASN1 {
   /// A simple ASN1 parser that will recursively iterate over a root node and return a Node tree.
diff --git a/Sources/CryptoSwift/ASN1/ASN1Encoder.swift b/Sources/CryptoSwift/ASN1/ASN1Encoder.swift
index 8c2475e6..e5e038e5 100644
--- a/Sources/CryptoSwift/ASN1/ASN1Encoder.swift
+++ b/Sources/CryptoSwift/ASN1/ASN1Encoder.swift
@@ -14,7 +14,11 @@
 //
 //  ASN1 Code inspired by Asn1Parser.swift from SwiftyRSA
 
+#if canImport(FoundationEssentials)
+import FoundationEssentials
+#else
 import Foundation
+#endif
 
 extension ASN1 {
   enum Encoder {
diff --git a/Sources/CryptoSwift/ASN1/ASN1Scanner.swift b/Sources/CryptoSwift/ASN1/ASN1Scanner.swift
index 886354a4..095b975a 100644
--- a/Sources/CryptoSwift/ASN1/ASN1Scanner.swift
+++ b/Sources/CryptoSwift/ASN1/ASN1Scanner.swift
@@ -14,7 +14,11 @@
 //
 //  ASN1 Scanner code is from Asn1Parser.swift from SwiftyRSA
 
+#if canImport(FoundationEssentials)
+import FoundationEssentials
+#else
 import Foundation
+#endif
 
 extension ASN1 {
   /// Simple data scanner that consumes bytes from a raw data and keeps an updated position.
diff --git a/Sources/CryptoSwift/CS_BigInt/Comparable.swift b/Sources/CryptoSwift/CS_BigInt/Comparable.swift
index 86b79ea4..2d901948 100644
--- a/Sources/CryptoSwift/CS_BigInt/Comparable.swift
+++ b/Sources/CryptoSwift/CS_BigInt/Comparable.swift
@@ -6,7 +6,11 @@
 //  Copyright © 2016-2017 Károly Lőrentey.
 //
 
+#if canImport(FoundationEssentials)
+import FoundationEssentials
+#else
 import Foundation
+#endif
 
 extension CS.BigUInt: Comparable {
     //MARK: Comparison
diff --git a/Sources/CryptoSwift/CS_BigInt/DataConversion.swift b/Sources/CryptoSwift/CS_BigInt/DataConversion.swift
index c1d8d958..ec706c70 100644
--- a/Sources/CryptoSwift/CS_BigInt/DataConversion.swift
+++ b/Sources/CryptoSwift/CS_BigInt/DataConversion.swift
@@ -6,7 +6,11 @@
 //  Copyright © 2016-2017 Károly Lőrentey.
 //
 
+#if canImport(FoundationEssentials)
+import FoundationEssentials
+#else
 import Foundation
+#endif
 
 extension CS.BigUInt {
     //MARK: NSData Conversion
diff --git a/Sources/CryptoSwift/Foundation/AES+Foundation.swift b/Sources/CryptoSwift/Foundation/AES+Foundation.swift
index 6654fdee..d2d73714 100644
--- a/Sources/CryptoSwift/Foundation/AES+Foundation.swift
+++ b/Sources/CryptoSwift/Foundation/AES+Foundation.swift
@@ -13,7 +13,11 @@
 //  - This notice may not be removed or altered from any source or binary distribution.
 //
 
+#if canImport(FoundationEssentials)
+import FoundationEssentials
+#else
 import Foundation
+#endif
 
 extension AES {
   /// Initialize with CBC block mode.
diff --git a/Sources/CryptoSwift/Foundation/Array+Foundation.swift b/Sources/CryptoSwift/Foundation/Array+Foundation.swift
index c979dfa6..c4a4221a 100644
--- a/Sources/CryptoSwift/Foundation/Array+Foundation.swift
+++ b/Sources/CryptoSwift/Foundation/Array+Foundation.swift
@@ -13,7 +13,11 @@
 //  - This notice may not be removed or altered from any source or binary distribution.
 //
 
+#if canImport(FoundationEssentials)
+import FoundationEssentials
+#else
 import Foundation
+#endif
 
 public extension Array where Element == UInt8 {
   func toBase64(options: Data.Base64EncodingOptions = []) -> String {
diff --git a/Sources/CryptoSwift/Foundation/Blowfish+Foundation.swift b/Sources/CryptoSwift/Foundation/Blowfish+Foundation.swift
index c15f414c..531568bc 100644
--- a/Sources/CryptoSwift/Foundation/Blowfish+Foundation.swift
+++ b/Sources/CryptoSwift/Foundation/Blowfish+Foundation.swift
@@ -13,7 +13,11 @@
 //  - This notice may not be removed or altered from any source or binary distribution.
 //
 
+#if canImport(FoundationEssentials)
+import FoundationEssentials
+#else
 import Foundation
+#endif
 
 extension Blowfish {
   /// Initialize with CBC block mode.
diff --git a/Sources/CryptoSwift/Foundation/ChaCha20+Foundation.swift b/Sources/CryptoSwift/Foundation/ChaCha20+Foundation.swift
index 973477d6..006c9e02 100644
--- a/Sources/CryptoSwift/Foundation/ChaCha20+Foundation.swift
+++ b/Sources/CryptoSwift/Foundation/ChaCha20+Foundation.swift
@@ -13,7 +13,11 @@
 //  - This notice may not be removed or altered from any source or binary distribution.
 //
 
+#if canImport(FoundationEssentials)
+import FoundationEssentials
+#else
 import Foundation
+#endif
 
 extension ChaCha20 {
   public convenience init(key: String, iv: String) throws {
diff --git a/Sources/CryptoSwift/Foundation/Data+Extension.swift b/Sources/CryptoSwift/Foundation/Data+Extension.swift
index a9677dd4..98fa34a6 100644
--- a/Sources/CryptoSwift/Foundation/Data+Extension.swift
+++ b/Sources/CryptoSwift/Foundation/Data+Extension.swift
@@ -13,7 +13,11 @@
 //  - This notice may not be removed or altered from any source or binary distribution.
 //
 
+#if canImport(FoundationEssentials)
+import FoundationEssentials
+#else
 import Foundation
+#endif
 
 extension Data {
   /// Two octet checksum as defined in RFC-4880. Sum of all octets, mod 65536
diff --git a/Sources/CryptoSwift/Foundation/HMAC+Foundation.swift b/Sources/CryptoSwift/Foundation/HMAC+Foundation.swift
index a41ba1bb..5dc7a57a 100644
--- a/Sources/CryptoSwift/Foundation/HMAC+Foundation.swift
+++ b/Sources/CryptoSwift/Foundation/HMAC+Foundation.swift
@@ -13,7 +13,11 @@
 //  - This notice may not be removed or altered from any source or binary distribution.
 //
 
+#if canImport(FoundationEssentials)
+import FoundationEssentials
+#else
 import Foundation
+#endif
 
 extension HMAC {
   public convenience init(key: String, variant: HMAC.Variant = .md5) throws {
diff --git a/Sources/CryptoSwift/Foundation/Rabbit+Foundation.swift b/Sources/CryptoSwift/Foundation/Rabbit+Foundation.swift
index ce066fda..9cd691f2 100644
--- a/Sources/CryptoSwift/Foundation/Rabbit+Foundation.swift
+++ b/Sources/CryptoSwift/Foundation/Rabbit+Foundation.swift
@@ -13,7 +13,11 @@
 //  - This notice may not be removed or altered from any source or binary distribution.
 //
 
+#if canImport(FoundationEssentials)
+import FoundationEssentials
+#else
 import Foundation
+#endif
 
 extension Rabbit {
   public convenience init(key: String) throws {
diff --git a/Sources/CryptoSwift/Foundation/String+FoundationExtension.swift b/Sources/CryptoSwift/Foundation/String+FoundationExtension.swift
index 89371f58..d53d30a8 100644
--- a/Sources/CryptoSwift/Foundation/String+FoundationExtension.swift
+++ b/Sources/CryptoSwift/Foundation/String+FoundationExtension.swift
@@ -13,7 +13,11 @@
 //  - This notice may not be removed or altered from any source or binary distribution.
 //
 
+#if canImport(FoundationEssentials)
+import FoundationEssentials
+#else
 import Foundation
+#endif
 
 extension String {
   /// Return Base64 back to String
diff --git a/Sources/CryptoSwift/Foundation/Utils+Foundation.swift b/Sources/CryptoSwift/Foundation/Utils+Foundation.swift
index 8ed7b841..618934e9 100644
--- a/Sources/CryptoSwift/Foundation/Utils+Foundation.swift
+++ b/Sources/CryptoSwift/Foundation/Utils+Foundation.swift
@@ -13,7 +13,11 @@
 //  - This notice may not be removed or altered from any source or binary distribution.
 //
 
+#if canImport(FoundationEssentials)
+import FoundationEssentials
+#else
 import Foundation
+#endif
 
 func perf(_ text: String, closure: () -> Void) {
   let measurementStart = Date()
diff --git a/Sources/CryptoSwift/Foundation/XChaCha20+Foundation.swift b/Sources/CryptoSwift/Foundation/XChaCha20+Foundation.swift
index b9f052e9..b297c8e4 100644
--- a/Sources/CryptoSwift/Foundation/XChaCha20+Foundation.swift
+++ b/Sources/CryptoSwift/Foundation/XChaCha20+Foundation.swift
@@ -13,7 +13,11 @@
 //  - This notice may not be removed or altered from any source or binary distribution.
 //
 
+#if canImport(FoundationEssentials)
+import FoundationEssentials
+#else
 import Foundation
+#endif
 
 extension XChaCha20 {
   /// Convenience initializer that creates an XChaCha20 instance with the given key and IV
diff --git a/Sources/CryptoSwift/ISO10126Padding.swift b/Sources/CryptoSwift/ISO10126Padding.swift
index 8aebd114..3187a501 100644
--- a/Sources/CryptoSwift/ISO10126Padding.swift
+++ b/Sources/CryptoSwift/ISO10126Padding.swift
@@ -13,7 +13,11 @@
 //  - This notice may not be removed or altered from any source or binary distribution.
 //
 
+#if canImport(FoundationEssentials)
+import FoundationEssentials
+#else
 import Foundation
+#endif
 
 /// Padding with random bytes, ending with the number of added bytes.
 /// Read the [Wikipedia](https://en.wikipedia.org/wiki/Padding_(cryptography)#ISO_10126)
diff --git a/Sources/CryptoSwift/ISO78164Padding.swift b/Sources/CryptoSwift/ISO78164Padding.swift
index e929f726..c01b4749 100644
--- a/Sources/CryptoSwift/ISO78164Padding.swift
+++ b/Sources/CryptoSwift/ISO78164Padding.swift
@@ -13,7 +13,11 @@
 //  - This notice may not be removed or altered from any source or binary distribution.
 //
 
+#if canImport(FoundationEssentials)
+import FoundationEssentials
+#else
 import Foundation
+#endif
 
 // First byte is 0x80, rest is zero padding
 // http://www.crypto-it.net/eng/theory/padding.html
diff --git a/Sources/CryptoSwift/PEM/DER.swift b/Sources/CryptoSwift/PEM/DER.swift
index 54545a35..1316f329 100644
--- a/Sources/CryptoSwift/PEM/DER.swift
+++ b/Sources/CryptoSwift/PEM/DER.swift
@@ -13,7 +13,11 @@
 //  - This notice may not be removed or altered from any source or binary distribution.
 //
 
+#if canImport(FoundationEssentials)
+import FoundationEssentials
+#else
 import Foundation
+#endif
 
 /// Conform to this protocol if your type can both be instantiated and expressed as an ASN1 DER representation.
 internal protocol DERCodable: DERDecodable, DEREncodable { }
diff --git a/Sources/CryptoSwift/RSA/RSA+Cipher.swift b/Sources/CryptoSwift/RSA/RSA+Cipher.swift
index e74132f9..1a465653 100644
--- a/Sources/CryptoSwift/RSA/RSA+Cipher.swift
+++ b/Sources/CryptoSwift/RSA/RSA+Cipher.swift
@@ -13,7 +13,11 @@
 //  - This notice may not be removed or altered from any source or binary distribution.
 //
 
+#if canImport(FoundationEssentials)
+import FoundationEssentials
+#else
 import Foundation
+#endif
 
 // MARK: Cipher
 
diff --git a/Sources/CryptoSwift/RSA/RSA+Signature.swift b/Sources/CryptoSwift/RSA/RSA+Signature.swift
index 7c643df8..a9e7739c 100644
--- a/Sources/CryptoSwift/RSA/RSA+Signature.swift
+++ b/Sources/CryptoSwift/RSA/RSA+Signature.swift
@@ -13,7 +13,11 @@
 //  - This notice may not be removed or altered from any source or binary distribution.
 //
 
+#if canImport(FoundationEssentials)
+import FoundationEssentials
+#else
 import Foundation
+#endif
 
 // MARK: Signatures & Verification
 
diff --git a/Sources/CryptoSwift/RSA/RSA.swift b/Sources/CryptoSwift/RSA/RSA.swift
index 749f1d08..8f767e61 100644
--- a/Sources/CryptoSwift/RSA/RSA.swift
+++ b/Sources/CryptoSwift/RSA/RSA.swift
@@ -14,7 +14,11 @@
 //
 
 // Foundation is required for `Data` to be found
+#if canImport(FoundationEssentials)
+import FoundationEssentials
+#else
 import Foundation
+#endif
 
 // Note: The `BigUInt` struct was copied from:
 // https://github.com/attaswift/BigInt
diff --git a/Sources/CryptoSwift/String+Extension.swift b/Sources/CryptoSwift/String+Extension.swift
index 635f04e8..a9770ec5 100644
--- a/Sources/CryptoSwift/String+Extension.swift
+++ b/Sources/CryptoSwift/String+Extension.swift
@@ -13,7 +13,11 @@
 //  - This notice may not be removed or altered from any source or binary distribution.
 //
 
+#if canImport(FoundationEssentials)
+import FoundationEssentials
+#else
 import Foundation
+#endif
 
 /** String extension */
 extension String {
diff --git a/Sources/CryptoSwift/UInt128.swift b/Sources/CryptoSwift/UInt128.swift
index 8bbcbf18..b0277812 100644
--- a/Sources/CryptoSwift/UInt128.swift
+++ b/Sources/CryptoSwift/UInt128.swift
@@ -13,7 +13,11 @@
 //  - This notice may not be removed or altered from any source or binary distribution.
 //
 
+#if canImport(FoundationEssentials)
+import FoundationEssentials
+#else
 import Foundation
+#endif
 
 struct UInt128: Equatable, ExpressibleByIntegerLiteral {
   let i: (a: UInt64, b: UInt64)
diff --git a/Sources/CryptoSwiftResources/Empty.swift b/Sources/CryptoSwiftResources/Empty.swift
new file mode 100644
index 00000000..8b137891
--- /dev/null
+++ b/Sources/CryptoSwiftResources/Empty.swift
@@ -0,0 +1 @@
+
diff --git a/Sources/CryptoSwift/PrivacyInfo.xcprivacy b/Sources/CryptoSwiftResources/PrivacyInfo.xcprivacy
similarity index 100%
rename from Sources/CryptoSwift/PrivacyInfo.xcprivacy
rename to Sources/CryptoSwiftResources/PrivacyInfo.xcprivacy
diff --git a/Tests/CryptoSwiftTests/AESCCMTests.swift b/Tests/CryptoSwiftTests/AESCCMTests.swift
index 1ee706a4..2fbd274d 100644
--- a/Tests/CryptoSwiftTests/AESCCMTests.swift
+++ b/Tests/CryptoSwiftTests/AESCCMTests.swift
@@ -13,7 +13,12 @@
 //  - This notice may not be removed or altered from any source or binary distribution.
 //
 
+#if canImport(FoundationEssentials)
+import FoundationEssentials
+#else
 import Foundation
+#endif
+
 import XCTest
 @testable import CryptoSwift
 
diff --git a/Tests/CryptoSwiftTests/AESOCBTests.swift b/Tests/CryptoSwiftTests/AESOCBTests.swift
index 30a651cc..4122be76 100644
--- a/Tests/CryptoSwiftTests/AESOCBTests.swift
+++ b/Tests/CryptoSwiftTests/AESOCBTests.swift
@@ -13,7 +13,12 @@
 //  - This notice may not be removed or altered from any source or binary distribution.
 //
 
+#if canImport(FoundationEssentials)
+import FoundationEssentials
+#else
 import Foundation
+#endif
+
 import XCTest
 @testable import CryptoSwift
 
diff --git a/Tests/CryptoSwiftTests/AESTests.swift b/Tests/CryptoSwiftTests/AESTests.swift
index 9f112015..8ae552dc 100644
--- a/Tests/CryptoSwiftTests/AESTests.swift
+++ b/Tests/CryptoSwiftTests/AESTests.swift
@@ -13,7 +13,12 @@
 //  - This notice may not be removed or altered from any source or binary distribution.
 //
 
+#if canImport(FoundationEssentials)
+import FoundationEssentials
+#else
 import Foundation
+#endif
+
 import XCTest
 @testable import CryptoSwift
 
diff --git a/Tests/CryptoSwiftTests/AESTestsPerf.swift b/Tests/CryptoSwiftTests/AESTestsPerf.swift
index 0b782486..b368376c 100644
--- a/Tests/CryptoSwiftTests/AESTestsPerf.swift
+++ b/Tests/CryptoSwiftTests/AESTestsPerf.swift
@@ -13,7 +13,12 @@
 //  - This notice may not be removed or altered from any source or binary distribution.
 //
 
+#if canImport(FoundationEssentials)
+import FoundationEssentials
+#else
 import Foundation
+#endif
+
 import XCTest
 @testable import CryptoSwift
 
diff --git a/Tests/CryptoSwiftTests/Access.swift b/Tests/CryptoSwiftTests/Access.swift
index 4eac75a7..aead8818 100644
--- a/Tests/CryptoSwiftTests/Access.swift
+++ b/Tests/CryptoSwiftTests/Access.swift
@@ -14,8 +14,13 @@
 //
 
 // import without @testable to test public API
-import CryptoSwift
+#if canImport(FoundationEssentials)
+import FoundationEssentials
+#else
 import Foundation
+#endif
+
+import CryptoSwift
 import XCTest
 
 class Access: XCTestCase {
diff --git a/Tests/CryptoSwiftTests/ChaCha20Tests.swift b/Tests/CryptoSwiftTests/ChaCha20Tests.swift
index d3989f72..ca44ab5b 100644
--- a/Tests/CryptoSwiftTests/ChaCha20Tests.swift
+++ b/Tests/CryptoSwiftTests/ChaCha20Tests.swift
@@ -13,7 +13,12 @@
 //  - This notice may not be removed or altered from any source or binary distribution.
 //
 
+#if canImport(FoundationEssentials)
+import FoundationEssentials
+#else
 import Foundation
+#endif
+
 import XCTest
 @testable import CryptoSwift
 
diff --git a/Tests/CryptoSwiftTests/ChaCha20TestsPerf.swift b/Tests/CryptoSwiftTests/ChaCha20TestsPerf.swift
index d25e8c52..c11e41a7 100644
--- a/Tests/CryptoSwiftTests/ChaCha20TestsPerf.swift
+++ b/Tests/CryptoSwiftTests/ChaCha20TestsPerf.swift
@@ -13,7 +13,12 @@
 //  - This notice may not be removed or altered from any source or binary distribution.
 //
 
+#if canImport(FoundationEssentials)
+import FoundationEssentials
+#else
 import Foundation
+#endif
+
 import XCTest
 @testable import CryptoSwift
 
diff --git a/Tests/CryptoSwiftTests/DigestTests.swift b/Tests/CryptoSwiftTests/DigestTests.swift
index c4587d85..932c3dff 100644
--- a/Tests/CryptoSwiftTests/DigestTests.swift
+++ b/Tests/CryptoSwiftTests/DigestTests.swift
@@ -16,7 +16,12 @@
 // http://www.di-mgt.com.au/sha_testvectors.html (http://csrc.nist.gov/groups/ST/toolkit/documents/Examples/SHA_All.pdf)
 //
 
+#if canImport(FoundationEssentials)
+import FoundationEssentials
+#else
 import Foundation
+#endif
+
 import XCTest
 @testable import CryptoSwift
 
diff --git a/Tests/CryptoSwiftTests/DigestTestsPerf.swift b/Tests/CryptoSwiftTests/DigestTestsPerf.swift
index 3d858a26..f28a017b 100644
--- a/Tests/CryptoSwiftTests/DigestTestsPerf.swift
+++ b/Tests/CryptoSwiftTests/DigestTestsPerf.swift
@@ -16,7 +16,12 @@
 // http://www.di-mgt.com.au/sha_testvectors.html (http://csrc.nist.gov/groups/ST/toolkit/documents/Examples/SHA_All.pdf)
 //
 
+#if canImport(FoundationEssentials)
+import FoundationEssentials
+#else
 import Foundation
+#endif
+
 import XCTest
 @testable import CryptoSwift
 
diff --git a/Tests/CryptoSwiftTests/Error+Extension.swift b/Tests/CryptoSwiftTests/Error+Extension.swift
index ac129e8f..56882259 100644
--- a/Tests/CryptoSwiftTests/Error+Extension.swift
+++ b/Tests/CryptoSwiftTests/Error+Extension.swift
@@ -13,7 +13,11 @@
 //  - This notice may not be removed or altered from any source or binary distribution.
 //
 
+#if canImport(FoundationEssentials)
+import FoundationEssentials
+#else
 import Foundation
+#endif
 
 #if !_runtime(_ObjC)
 
diff --git a/Tests/CryptoSwiftTests/ExtensionsTest.swift b/Tests/CryptoSwiftTests/ExtensionsTest.swift
index df712a67..2e37cd7c 100644
--- a/Tests/CryptoSwiftTests/ExtensionsTest.swift
+++ b/Tests/CryptoSwiftTests/ExtensionsTest.swift
@@ -13,7 +13,12 @@
 //  - This notice may not be removed or altered from any source or binary distribution.
 //
 
+#if canImport(FoundationEssentials)
+import FoundationEssentials
+#else
 import Foundation
+#endif
+
 import XCTest
 @testable import CryptoSwift
 
diff --git a/Tests/CryptoSwiftTests/ExtensionsTestPerf.swift b/Tests/CryptoSwiftTests/ExtensionsTestPerf.swift
index 10d24079..6382e732 100644
--- a/Tests/CryptoSwiftTests/ExtensionsTestPerf.swift
+++ b/Tests/CryptoSwiftTests/ExtensionsTestPerf.swift
@@ -13,7 +13,12 @@
 //  - This notice may not be removed or altered from any source or binary distribution.
 //
 
+#if canImport(FoundationEssentials)
+import FoundationEssentials
+#else
 import Foundation
+#endif
+
 import XCTest
 @testable import CryptoSwift
 
diff --git a/Tests/CryptoSwiftTests/Poly1305Tests.swift b/Tests/CryptoSwiftTests/Poly1305Tests.swift
index 2777b15e..5d1c216f 100644
--- a/Tests/CryptoSwiftTests/Poly1305Tests.swift
+++ b/Tests/CryptoSwiftTests/Poly1305Tests.swift
@@ -13,7 +13,12 @@
 //  - This notice may not be removed or altered from any source or binary distribution.
 //
 
+#if canImport(FoundationEssentials)
+import FoundationEssentials
+#else
 import Foundation
+#endif
+
 import XCTest
 @testable import CryptoSwift
 
diff --git a/Tests/CryptoSwiftTests/RSASecKeyTests.swift b/Tests/CryptoSwiftTests/RSASecKeyTests.swift
index 50b6fa7c..551f3a56 100644
--- a/Tests/CryptoSwiftTests/RSASecKeyTests.swift
+++ b/Tests/CryptoSwiftTests/RSASecKeyTests.swift
@@ -493,7 +493,7 @@
     )
     """
 
-    private func initSecKey(rawRepresentation unsafe: Data) throws -> SecKey {
+    private func initSecKey(rawRepresentation `unsafe`: Data) throws -> SecKey {
       let attributes: [String: Any] = [
         kSecAttrKeyType as String: kSecAttrKeyTypeRSA,
         kSecAttrKeyClass as String: kSecAttrKeyClassPrivate,
@@ -502,7 +502,7 @@
       ]
 
       var error: Unmanaged<CFError>?
-      guard let secKey = SecKeyCreateWithData(unsafe as CFData, attributes as CFDictionary, &error) else {
+      guard let secKey = SecKeyCreateWithData(`unsafe` as CFData, attributes as CFDictionary, &error) else {
         throw NSError(domain: "Error constructing SecKey from raw key data: \(error.debugDescription)", code: 0, userInfo: nil)
       }
 
diff --git a/Tests/CryptoSwiftTests/RSATests.swift b/Tests/CryptoSwiftTests/RSATests.swift
index 82477e67..cbfbc363 100644
--- a/Tests/CryptoSwiftTests/RSATests.swift
+++ b/Tests/CryptoSwiftTests/RSATests.swift
@@ -13,7 +13,12 @@
 //  - This notice may not be removed or altered from any source or binary distribution.
 //
 
+#if canImport(FoundationEssentials)
+import FoundationEssentials
+#else
 import Foundation
+#endif
+
 import XCTest
 @testable import CryptoSwift
 
diff --git a/Tests/CryptoSwiftTests/SHATestsPerf.swift b/Tests/CryptoSwiftTests/SHATestsPerf.swift
index c1f52aa2..8715cd66 100644
--- a/Tests/CryptoSwiftTests/SHATestsPerf.swift
+++ b/Tests/CryptoSwiftTests/SHATestsPerf.swift
@@ -13,7 +13,12 @@
 //  - This notice may not be removed or altered from any source or binary distribution.
 //
 
+#if canImport(FoundationEssentials)
+import FoundationEssentials
+#else
 import Foundation
+#endif
+
 import XCTest
 @testable import CryptoSwift
 
diff --git a/Tests/CryptoSwiftTests/SignatureVerificationTests.swift b/Tests/CryptoSwiftTests/SignatureVerificationTests.swift
index 159184aa..1e3232f8 100644
--- a/Tests/CryptoSwiftTests/SignatureVerificationTests.swift
+++ b/Tests/CryptoSwiftTests/SignatureVerificationTests.swift
@@ -12,7 +12,12 @@
 //  - This notice may not be removed or altered from any source or binary distribution.
 //
 
+#if canImport(FoundationEssentials)
+import FoundationEssentials
+#else
 import Foundation
+#endif
+
 import XCTest
 @testable import CryptoSwift