diff --git a/Sources/WebAuthn/Ceremonies/Authentication/AuthenticationCredential.swift b/Sources/WebAuthn/Ceremonies/Authentication/AuthenticationCredential.swift
index 88dc884..166099d 100644
--- a/Sources/WebAuthn/Ceremonies/Authentication/AuthenticationCredential.swift
+++ b/Sources/WebAuthn/Ceremonies/Authentication/AuthenticationCredential.swift
@@ -34,7 +34,7 @@ public struct AuthenticationCredential: Sendable {
     public let type: CredentialType
 }
 
-extension AuthenticationCredential: Decodable {
+extension AuthenticationCredential: Codable {
     public init(from decoder: Decoder) throws {
         let container = try decoder.container(keyedBy: CodingKeys.self)
 
@@ -44,6 +44,17 @@ extension AuthenticationCredential: Decodable {
         authenticatorAttachment = try container.decodeIfPresent(AuthenticatorAttachment.self, forKey: .authenticatorAttachment)
         type = try container.decode(CredentialType.self, forKey: .type)
     }
+    
+    public func encode(to encoder: Encoder) throws {
+         var container = encoder.container(keyedBy: CodingKeys.self)
+     
+         try container.encode(id, forKey: .id)
+         try container.encode(rawID.base64URLEncodedString(), forKey: .rawID)
+         try container.encode(response, forKey: .response)
+         try container.encodeIfPresent(authenticatorAttachment, forKey: .authenticatorAttachment)
+         try container.encode(type, forKey: .type)
+      }
+
 
     private enum CodingKeys: String, CodingKey {
         case id
diff --git a/Sources/WebAuthn/Ceremonies/Authentication/AuthenticatorAssertionResponse.swift b/Sources/WebAuthn/Ceremonies/Authentication/AuthenticatorAssertionResponse.swift
index 979ba08..932b154 100644
--- a/Sources/WebAuthn/Ceremonies/Authentication/AuthenticatorAssertionResponse.swift
+++ b/Sources/WebAuthn/Ceremonies/Authentication/AuthenticatorAssertionResponse.swift
@@ -48,7 +48,7 @@ public struct AuthenticatorAssertionResponse: Sendable {
     public let attestationObject: [UInt8]?
 }
 
-extension AuthenticatorAssertionResponse: Decodable {
+extension AuthenticatorAssertionResponse: Codable {
     public init(from decoder: Decoder) throws {
         let container = try decoder.container(keyedBy: CodingKeys.self)
 
@@ -58,6 +58,17 @@ extension AuthenticatorAssertionResponse: Decodable {
         userHandle = try container.decodeBytesFromURLEncodedBase64IfPresent(forKey: .userHandle)
         attestationObject = try container.decodeBytesFromURLEncodedBase64IfPresent(forKey: .attestationObject)
     }
+    
+    public func encode(to encoder: Encoder) throws {
+         var container = encoder.container(keyedBy: CodingKeys.self)
+     
+        try container.encode(clientDataJSON.base64URLEncodedString(), forKey: .clientDataJSON)
+        try container.encode(authenticatorData.base64URLEncodedString(), forKey: .authenticatorData)
+        try container.encode(signature.base64URLEncodedString(), forKey: .signature)
+        try container.encodeIfPresent(userHandle?.base64URLEncodedString(),forKey: .userHandle)
+        try container.encodeIfPresent(attestationObject?.base64URLEncodedString(),forKey: .attestationObject)
+      }
+
 
     private enum CodingKeys: String, CodingKey {
         case clientDataJSON
diff --git a/Sources/WebAuthn/Ceremonies/Authentication/PublicKeyCredentialRequestOptions.swift b/Sources/WebAuthn/Ceremonies/Authentication/PublicKeyCredentialRequestOptions.swift
index e142aa3..96610c7 100644
--- a/Sources/WebAuthn/Ceremonies/Authentication/PublicKeyCredentialRequestOptions.swift
+++ b/Sources/WebAuthn/Ceremonies/Authentication/PublicKeyCredentialRequestOptions.swift
@@ -18,30 +18,30 @@ import Foundation
 /// When encoding using `Encodable`, the byte arrays are encoded as base64url.
 ///
 /// - SeeAlso: https://www.w3.org/TR/webauthn-2/#dictionary-assertion-options
-public struct PublicKeyCredentialRequestOptions: Encodable, Sendable {
+public struct PublicKeyCredentialRequestOptions: Codable, Sendable {
     /// A challenge that the authenticator signs, along with other data, when producing an authentication assertion
     ///
     /// When encoding using `Encodable` this is encoded as base64url.
-    public let challenge: [UInt8]
+    public var challenge: [UInt8]
 
     /// A time, in seconds, that the caller is willing to wait for the call to complete. This is treated as a
     /// hint, and may be overridden by the client.
     ///
     /// - Note: When encoded, this value is represented in milleseconds as a ``UInt32``.
     /// See https://www.w3.org/TR/webauthn-2/#dictionary-assertion-options
-    public let timeout: Duration?
+    public var timeout: Duration?
 
     /// The ID of the Relying Party making the request.
     ///
     /// This is configured on ``WebAuthnManager`` before its ``WebAuthnManager/beginAuthentication(timeout:allowCredentials:userVerification:)`` method is called.
     /// - Note: When encoded, this field appears as `rpId` to match the expectations of `navigator.credentials.get()`.
-    public let relyingPartyID: String
+    public var relyingPartyID: String
 
     /// Optionally used by the client to find authenticators eligible for this authentication ceremony.
-    public let allowCredentials: [PublicKeyCredentialDescriptor]?
+    public var allowCredentials: [PublicKeyCredentialDescriptor]?
 
     /// Specifies whether the user should be verified during the authentication ceremony.
-    public let userVerification: UserVerificationRequirement?
+    public var userVerification: UserVerificationRequirement?
 
     // let extensions: [String: Any]
 
@@ -50,15 +50,41 @@ public struct PublicKeyCredentialRequestOptions: Encodable, Sendable {
 
         try container.encode(challenge.base64URLEncodedString(), forKey: .challenge)
         try container.encodeIfPresent(timeout?.milliseconds, forKey: .timeout)
-        try container.encode(relyingPartyID, forKey: .rpID)
+        try container.encode(relyingPartyID, forKey: .relyingPartyID)
         try container.encodeIfPresent(allowCredentials, forKey: .allowCredentials)
         try container.encodeIfPresent(userVerification, forKey: .userVerification)
     }
+    
+    public init(
+        challenge: [UInt8],
+        timeout: Duration?,
+        relyingPartyID: String,
+        allowCredentials: [PublicKeyCredentialDescriptor]?,
+        userVerification: UserVerificationRequirement?) {
+        self.challenge = challenge
+        self.timeout = timeout
+        self.relyingPartyID = relyingPartyID
+        self.allowCredentials = allowCredentials
+        self.userVerification = userVerification
+    }
+
+    public init(from decoder: any Decoder) throws {
+        let values = try decoder.container(keyedBy: CodingKeys.self)
+
+        self.challenge = try values.decodeBytesFromURLEncodedBase64(forKey: .challenge)
+
+        if let timeout = try values.decodeIfPresent(UInt32.self, forKey:.timeout) {
+            self.timeout=Duration.milliseconds(timeout)
+        }
+        self.relyingPartyID=try values.decode(String.self, forKey:.relyingPartyID)
+        self.allowCredentials=try values.decodeIfPresent([PublicKeyCredentialDescriptor].self,forKey: .allowCredentials)
+        self.userVerification=try values.decodeIfPresent(UserVerificationRequirement.self,forKey: .userVerification)
+    }
 
     private enum CodingKeys: String, CodingKey {
         case challenge
         case timeout
-        case rpID = "rpId"
+        case relyingPartyID = "rpId"
         case allowCredentials
         case userVerification
     }
@@ -67,10 +93,10 @@ public struct PublicKeyCredentialRequestOptions: Encodable, Sendable {
 /// Information about a generated credential.
 ///
 /// When encoding using `Encodable`, `id` is encoded as base64url.
-public struct PublicKeyCredentialDescriptor: Equatable, Encodable, Sendable {
+public struct PublicKeyCredentialDescriptor: Equatable, Codable, Sendable {
     /// Defines hints as to how clients might communicate with a particular authenticator in order to obtain an
     /// assertion for a specific credential
-    public enum AuthenticatorTransport: String, Equatable, Encodable, Sendable {
+    public enum AuthenticatorTransport: String, Equatable, Codable, Sendable {
         /// Indicates the respective authenticator can be contacted over removable USB.
         case usb
         /// Indicates the respective authenticator can be contacted over Near Field Communication (NFC).
@@ -114,6 +140,14 @@ public struct PublicKeyCredentialDescriptor: Equatable, Encodable, Sendable {
         try container.encode(id.base64URLEncodedString(), forKey: .id)
         try container.encodeIfPresent(transports, forKey: .transports)
     }
+    
+    public init(from decoder: any Decoder) throws {
+        let container = try decoder.container(keyedBy: CodingKeys.self)
+        let type = try container.decode(CredentialType.self,forKey: .type)
+        let id = try container.decodeBytesFromURLEncodedBase64( forKey: .id)
+        let transports = try container.decodeIfPresent([AuthenticatorTransport].self,forKey:.transports) ?? []
+        self.init(type: type, id:id, transports: transports)
+    }
 
     private enum CodingKeys: String, CodingKey {
         case type
@@ -124,7 +158,7 @@ public struct PublicKeyCredentialDescriptor: Equatable, Encodable, Sendable {
 
 /// The Relying Party may require user verification for some of its operations but not for others, and may use this
 /// type to express its needs.
-public enum UserVerificationRequirement: String, Encodable, Sendable {
+public enum UserVerificationRequirement: String, Codable, Sendable {
     /// The Relying Party requires user verification for the operation and will fail the overall ceremony if the
     /// user wasn't verified.
     case required
diff --git a/Sources/WebAuthn/Ceremonies/Registration/AttestationConveyancePreference.swift b/Sources/WebAuthn/Ceremonies/Registration/AttestationConveyancePreference.swift
index 770af12..a720bc8 100644
--- a/Sources/WebAuthn/Ceremonies/Registration/AttestationConveyancePreference.swift
+++ b/Sources/WebAuthn/Ceremonies/Registration/AttestationConveyancePreference.swift
@@ -14,7 +14,7 @@
 /// Options to specify the Relying Party's preference regarding attestation conveyance during credential generation.
 ///
 /// Currently only supports `none`.
-public enum AttestationConveyancePreference: String, Encodable, Sendable {
+public enum AttestationConveyancePreference: String, Codable, Sendable {
     /// Indicates the Relying Party is not interested in authenticator attestation.
     case none
     // case indirect
diff --git a/Sources/WebAuthn/Ceremonies/Registration/AuthenticatorAttestationResponse.swift b/Sources/WebAuthn/Ceremonies/Registration/AuthenticatorAttestationResponse.swift
index 0d45439..b986485 100644
--- a/Sources/WebAuthn/Ceremonies/Registration/AuthenticatorAttestationResponse.swift
+++ b/Sources/WebAuthn/Ceremonies/Registration/AuthenticatorAttestationResponse.swift
@@ -29,13 +29,21 @@ public struct AuthenticatorAttestationResponse: Sendable {
     public let attestationObject: [UInt8]
 }
 
-extension AuthenticatorAttestationResponse: Decodable {
+extension AuthenticatorAttestationResponse: Codable {
     public init(from decoder: Decoder) throws {
         let container = try decoder.container(keyedBy: CodingKeys.self)
 
         clientDataJSON = try container.decodeBytesFromURLEncodedBase64(forKey: .clientDataJSON)
         attestationObject = try container.decodeBytesFromURLEncodedBase64(forKey: .attestationObject)
     }
+    
+    public func encode(to encoder: Encoder) throws {
+        var container = encoder.container(keyedBy: CodingKeys.self)
+    
+        try container.encode(clientDataJSON.base64URLEncodedString(), forKey: .clientDataJSON)
+        try container.encode(attestationObject.base64URLEncodedString(), forKey: .attestationObject)
+     }
+
 
     private enum CodingKeys: String, CodingKey {
         case clientDataJSON
diff --git a/Sources/WebAuthn/Ceremonies/Registration/PublicKeyCredentialCreationOptions.swift b/Sources/WebAuthn/Ceremonies/Registration/PublicKeyCredentialCreationOptions.swift
index a069c4a..80dacfd 100644
--- a/Sources/WebAuthn/Ceremonies/Registration/PublicKeyCredentialCreationOptions.swift
+++ b/Sources/WebAuthn/Ceremonies/Registration/PublicKeyCredentialCreationOptions.swift
@@ -19,7 +19,7 @@ import Foundation
 /// `Encodable` byte arrays are base64url encoded.
 ///
 /// - SeeAlso: https://www.w3.org/TR/webauthn-2/#dictionary-makecredentialoptions
-public struct PublicKeyCredentialCreationOptions: Encodable, Sendable {
+public struct PublicKeyCredentialCreationOptions: Codable, Sendable {
     /// A byte array randomly generated by the Relying Party. Should be at least 16 bytes long to ensure sufficient
     /// entropy.
     ///
@@ -28,24 +28,24 @@ public struct PublicKeyCredentialCreationOptions: Encodable, Sendable {
     public let challenge: [UInt8]
 
     /// Contains names and an identifier for the user account performing the registration
-    public let user: PublicKeyCredentialUserEntity
+    public var user: PublicKeyCredentialUserEntity
 
     /// Contains a name and an identifier for the Relying Party responsible for the request
-    public let relyingParty: PublicKeyCredentialRelyingPartyEntity
+    public var relyingParty: PublicKeyCredentialRelyingPartyEntity
 
     /// A list of key types and signature algorithms the Relying Party supports. Ordered from most preferred to least
     /// preferred.
-    public let publicKeyCredentialParameters: [PublicKeyCredentialParameters]
+    public var publicKeyCredentialParameters: [PublicKeyCredentialParameters]
 
     /// A time, in seconds, that the caller is willing to wait for the call to complete. This is treated as a
     /// hint, and may be overridden by the client.
     ///
     /// - Note: When encoded, this value is represented in milleseconds as a ``UInt32``.
-    public let timeout: Duration?
+    public var timeout: Duration?
 
     /// Sets the Relying Party's preference for attestation conveyance. At the time of writing only `none` is
     /// supported.
-    public let attestation: AttestationConveyancePreference
+    public var attestation: AttestationConveyancePreference
 
     public func encode(to encoder: Encoder) throws {
         var container = encoder.container(keyedBy: CodingKeys.self)
@@ -57,6 +57,29 @@ public struct PublicKeyCredentialCreationOptions: Encodable, Sendable {
         try container.encodeIfPresent(timeout?.milliseconds, forKey: .timeout)
         try container.encode(attestation, forKey: .attestation)
     }
+    
+    public init(from decoder: any Decoder) throws {
+        let values = try decoder.container(keyedBy: CodingKeys.self)
+        
+        self.challenge = try values.decodeBytesFromURLEncodedBase64(forKey: .challenge)
+        self.user = try values.decode(PublicKeyCredentialUserEntity.self, forKey: .user)
+        self.relyingParty = try values.decode(PublicKeyCredentialRelyingPartyEntity.self, forKey:.relyingParty)
+        self.publicKeyCredentialParameters =  try values.decode([PublicKeyCredentialParameters].self, forKey:.publicKeyCredentialParameters)
+        if let timeout = try values.decodeIfPresent(UInt32.self,forKey:.timeout) {
+            self.timeout = Duration.milliseconds(timeout)
+        }
+        self.attestation = try values.decode(AttestationConveyancePreference.self, forKey:.attestation)
+    }
+    
+    public init(challenge: [UInt8], user: PublicKeyCredentialUserEntity, relyingParty: PublicKeyCredentialRelyingPartyEntity, publicKeyCredentialParameters: [PublicKeyCredentialParameters],
+                timeout: Duration?, attestation: AttestationConveyancePreference) {
+        self.challenge = challenge
+        self.user = user
+        self.relyingParty = relyingParty
+        self.publicKeyCredentialParameters = publicKeyCredentialParameters
+        self.timeout = timeout
+        self.attestation = attestation
+    }
 
     private enum CodingKeys: String, CodingKey {
         case challenge
@@ -70,7 +93,7 @@ public struct PublicKeyCredentialCreationOptions: Encodable, Sendable {
 
 // MARK: - Credential parameters
 /// From §5.3 (https://w3c.github.io/TR/webauthn/#dictionary-credential-params)
-public struct PublicKeyCredentialParameters: Equatable, Encodable, Sendable {
+public struct PublicKeyCredentialParameters: Equatable, Codable, Sendable {
     /// The type of credential to be created. At the time of writing always ``CredentialType/publicKey``.
     public let type: CredentialType
     /// The cryptographic signature algorithm with which the newly generated credential will be used, and thus also
@@ -87,6 +110,13 @@ public struct PublicKeyCredentialParameters: Equatable, Encodable, Sendable {
         self.type = type
         self.alg = alg
     }
+    
+    public init(from decoder: any Decoder) throws {
+        let container = try decoder.container(keyedBy: CodingKeys.self)
+        let type = try container.decode(CredentialType.self,forKey: .type)
+        let alg = try container.decode(COSEAlgorithmIdentifier.self, forKey: .alg)
+        self.init(type:type,alg:alg)
+    }
 }
 
 extension Array where Element == PublicKeyCredentialParameters {
@@ -103,7 +133,7 @@ extension Array where Element == PublicKeyCredentialParameters {
 /// From §5.4.2 (https://www.w3.org/TR/webauthn/#sctn-rp-credential-params).
 /// The PublicKeyCredentialRelyingPartyEntity dictionary is used to supply additional Relying Party attributes when
 /// creating a new credential.
-public struct PublicKeyCredentialRelyingPartyEntity: Encodable, Sendable {
+public struct PublicKeyCredentialRelyingPartyEntity: Codable, Sendable {
     /// A unique identifier for the Relying Party entity.
     public let id: String
 
@@ -111,6 +141,15 @@ public struct PublicKeyCredentialRelyingPartyEntity: Encodable, Sendable {
     /// "Wonderful Widgets, Inc." or "ОАО Примертех".
     public let name: String
 
+    public init(_ src : PublicKeyCredentialRelyingPartyEntity) {
+        self.id = src.id
+        self.name = src.name
+    }
+    
+    public init(id : String, name : String) {
+        self.id = id
+        self.name = name
+    }
 }
 
  /// From §5.4.3 (https://www.w3.org/TR/webauthn/#dictionary-user-credential-params)
@@ -118,7 +157,7 @@ public struct PublicKeyCredentialRelyingPartyEntity: Encodable, Sendable {
  /// creating a new credential.
  ///
  /// When encoding using `Encodable`, `id` is base64url encoded.
-public struct PublicKeyCredentialUserEntity: Encodable, Sendable {
+public struct PublicKeyCredentialUserEntity: Codable, Sendable {
     /// Generated by the Relying Party, unique to the user account, and must not contain personally identifying
     /// information about the user.
     ///
@@ -149,6 +188,15 @@ public struct PublicKeyCredentialUserEntity: Encodable, Sendable {
         try container.encode(name, forKey: .name)
         try container.encode(displayName, forKey: .displayName)
     }
+    
+    public init(from decoder: any Decoder) throws {
+        let container = try decoder.container(keyedBy: CodingKeys.self)
+        let id = try container.decodeBytesFromURLEncodedBase64(forKey: .id)
+        let name = try container.decode(String.self, forKey: .name)
+        let displayName = try container.decode(String.self, forKey: .displayName)
+        self.init(id: id, name: name, displayName: displayName)
+    }
+
 
     private enum CodingKeys: String, CodingKey {
         case id
diff --git a/Sources/WebAuthn/Ceremonies/Registration/RegistrationCredential.swift b/Sources/WebAuthn/Ceremonies/Registration/RegistrationCredential.swift
index fe8a88f..112be8e 100644
--- a/Sources/WebAuthn/Ceremonies/Registration/RegistrationCredential.swift
+++ b/Sources/WebAuthn/Ceremonies/Registration/RegistrationCredential.swift
@@ -31,7 +31,7 @@ public struct RegistrationCredential: Sendable {
     public let attestationResponse: AuthenticatorAttestationResponse
 }
 
-extension RegistrationCredential: Decodable {
+extension RegistrationCredential: Codable {
     public init(from decoder: Decoder) throws {
         let container = try decoder.container(keyedBy: CodingKeys.self)
 
@@ -47,6 +47,15 @@ extension RegistrationCredential: Decodable {
         self.rawID = rawID
         attestationResponse = try container.decode(AuthenticatorAttestationResponse.self, forKey: .attestationResponse)
     }
+    
+    public func encode(to encoder: Encoder) throws {
+        var container = encoder.container(keyedBy: CodingKeys.self)
+
+        try container.encode(id, forKey: .id)
+        try container.encode(rawID.base64URLEncodedString(), forKey: .rawID)
+        try container.encode(attestationResponse, forKey: .attestationResponse)
+    }
+
 
     private enum CodingKeys: String, CodingKey {
         case id
diff --git a/Sources/WebAuthn/Ceremonies/Shared/COSE/COSEAlgorithmIdentifier.swift b/Sources/WebAuthn/Ceremonies/Shared/COSE/COSEAlgorithmIdentifier.swift
index 50ecee2..0f60325 100644
--- a/Sources/WebAuthn/Ceremonies/Shared/COSE/COSEAlgorithmIdentifier.swift
+++ b/Sources/WebAuthn/Ceremonies/Shared/COSE/COSEAlgorithmIdentifier.swift
@@ -17,7 +17,7 @@ import Crypto
 /// COSEAlgorithmIdentifier From §5.10.5. A number identifying a cryptographic algorithm. The algorithm
 /// identifiers SHOULD be values registered in the IANA COSE Algorithms registry
 /// [https://www.w3.org/TR/webauthn/#biblio-iana-cose-algs-reg], for instance, -7 for "ES256" and -257 for "RS256".
-public enum COSEAlgorithmIdentifier: Int, RawRepresentable, CaseIterable, Encodable, Sendable {
+public enum COSEAlgorithmIdentifier: Int, RawRepresentable, CaseIterable, Codable, Sendable {
     /// AlgES256 ECDSA with SHA-256
 	case algES256 = -7
 	/// AlgES384 ECDSA with SHA-384