# Digest A type that represents the output of a hash. ``` @preconcurrency protocol Digest : ContiguousBytes, CustomStringConvertible, Hashable, Sendable, Sequence where Self.Element == UInt8 ``` ## Topics ### Getting the digest length [`static var byteCount: Int`](/documentation/CryptoKit/Digest/byteCount) The number of bytes in the digest. ### Comparing digests [`static func == (Self, D) -> Bool`](/documentation/CryptoKit/Digest/==(_:_:)-7yz3z) Determines whether a digest is equivalent to a collection of contiguous bytes. [`static func == (Self, Self) -> Bool`](/documentation/CryptoKit/Digest/==(_:_:)-6m59k) Determines whether two digests are equal. ### Default Implementations [CustomStringConvertible Implementations](/documentation/CryptoKit/Digest/CustomStringConvertible-Implementations) ## Relationships ### Conforming Types [`MD5Digest`](/documentation/CryptoKit/Insecure/MD5Digest) [`SHA384Digest`](/documentation/CryptoKit/SHA384Digest) [`SHA256Digest`](/documentation/CryptoKit/SHA256Digest) [`SHA512Digest`](/documentation/CryptoKit/SHA512Digest) [`SHA3_512Digest`](/documentation/CryptoKit/SHA3_512Digest) [`SHA1Digest`](/documentation/CryptoKit/Insecure/SHA1Digest) [`SHA3_384Digest`](/documentation/CryptoKit/SHA3_384Digest) [`SHA3_256Digest`](/documentation/CryptoKit/SHA3_256Digest) ### Inherits From [`ContiguousBytes`](/documentation/Foundation/ContiguousBytes) [`Sendable`](/documentation/Swift/Sendable) [`CustomStringConvertible`](/documentation/Swift/CustomStringConvertible) [`Equatable`](/documentation/Swift/Equatable) [`SendableMetatype`](/documentation/Swift/SendableMetatype) [`Sequence`](/documentation/Swift/Sequence) [`Hashable`](/documentation/Swift/Hashable) --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)