diff --git a/GitSpace/Sources/Models/Chat.swift b/GitSpace/Sources/Models/Chat.swift
index 3d220c4b..70248318 100644
--- a/GitSpace/Sources/Models/Chat.swift
+++ b/GitSpace/Sources/Models/Chat.swift
@@ -16,7 +16,7 @@ struct Chat: Identifiable, Codable {
     let joinedMemberIDs: [String] // 채팅방에 참여한 유저 ID 리스트
     var lastContent: String // 마지막 메세지 내용
     var lastContentDate: Date // 마지막 메세지 날짜
-    let knockContent: String // 노크 메세지 내용
+    var knockContent: String // 노크 메세지 내용
     let knockContentDate: Date // 노크 메세지 날짜
     var unreadMessageCount: [String : Int] // 읽지 않은 메시지 갯수 (userID : 읽지 않은 메시지 갯수)
     
@@ -75,4 +75,18 @@ struct Chat: Identifiable, Codable {
             unreadMessageCount: [:]
         )
     }
+    
+    static func encodedChat(with chat: Chat) -> Chat {
+        var encodedChat: Chat = chat
+        encodedChat.knockContent = chat.knockContent.asBase64 ?? ""
+        encodedChat.lastContent = chat.lastContent.asBase64 ?? ""
+        return encodedChat
+    }
+    
+    static func decodedChat(with chat: Chat) -> Chat {
+        var decodedChat: Chat = chat
+        decodedChat.knockContent = chat.knockContent.decodedBase64String ?? ""
+        decodedChat.lastContent = chat.lastContent.decodedBase64String ?? ""
+        return decodedChat
+    }
 }
diff --git a/GitSpace/Sources/Models/Message.swift b/GitSpace/Sources/Models/Message.swift
index b4c1e3ff..dbb261fd 100644
--- a/GitSpace/Sources/Models/Message.swift
+++ b/GitSpace/Sources/Models/Message.swift
@@ -1,5 +1,5 @@
 //
-//  ChatCellModel.swift
+//  MessageCellModel.swift
 //  GitSpace
 //
 //  Created by 원태영 on 2023/01/27.
@@ -11,7 +11,7 @@ import Foundation
 struct Message : Identifiable, Codable {
     let id: String // 메세지 ID
     let senderID: String // 메세지 작성자 유저 ID
-    let textContent: String // 메세지 내용
+    var textContent: String // 메세지 내용
     let imageContent: String? // 메세지에 첨부한 이미지
     let sentDate: Date // 메세지 작성 날짜
     let isRead: Bool // 수신 유저의 메세지 확인 여부
@@ -24,4 +24,16 @@ struct Message : Identifiable, Codable {
         
         return dateFormatter.string(from: sentDate)
     }
+    
+    static func encodedMessage(with message: Message) -> Message {
+        var encodedMessage: Message = message
+        encodedMessage.textContent = message.textContent.asBase64 ?? ""
+        return encodedMessage
+    }
+    
+    static func decodedMessage(with message: Message) -> Message {
+        var decodedMessage: Message = message
+        decodedMessage.textContent = message.textContent.decodedBase64String ?? ""
+        return decodedMessage
+    }
 }
diff --git a/GitSpace/Sources/ViewModels/ChatViewModel.swift b/GitSpace/Sources/ViewModels/ChatViewModel.swift
index 2a3932f2..ca4119de 100644
--- a/GitSpace/Sources/ViewModels/ChatViewModel.swift
+++ b/GitSpace/Sources/ViewModels/ChatViewModel.swift
@@ -75,7 +75,8 @@ extension ChatStore {
     private func decodeNewChat(change: QueryDocumentSnapshot) -> Chat? {
         do {
             let newChat = try change.data(as: Chat.self)
-            return newChat
+            let decodedNewChat: Chat = .decodedChat(with: newChat)
+            return decodedNewChat
         } catch {
             print("Error-\(#file)-\(#function) : \(error.localizedDescription)")
         }
@@ -122,7 +123,8 @@ extension ChatStore {
     func addListener() {
         listener = db
             .collection(const.COLLECTION_CHAT)
-            .whereField(const.FIELD_JOINED_MEMBER_IDS, arrayContains: Utility.loginUserID)
+            .whereField(const.FIELD_JOINED_MEMBER_IDS,
+                        arrayContains: Utility.loginUserID)
             .addSnapshotListener { snapshot, error in
                 
                 guard let snapshot else { return }
@@ -194,7 +196,8 @@ extension ChatStore {
                 do {
                     let chat: Chat = try document.data(as: Chat.self)
                     if let targetUserInfo = await UserStore.requestAndReturnUser(userID: chat.targetUserID) {
-                        newChats.append(chat)
+                        let decodedChat: Chat = .decodedChat(with: chat)
+                        newChats.append(decodedChat)
                         targetUserInfoDict[chat.id] = targetUserInfo
                     }
                 } catch {
@@ -212,10 +215,11 @@ extension ChatStore {
 		do {
 			let pushedChat = try await doc.getDocument(as: Chat.self)
             // FIXME: Chat의 targetUserName을 사용하지 않기 위해 UserStore의 UserInfo 요청 메서드 구현. 해당 메서드로 로직 대체 By. 태영
-
+            let decodedPushedChat: Chat = .decodedChat(with: pushedChat)
+            
             if let targetUserInfo = await UserStore.requestAndReturnUser(userID: pushedChat.targetUserID) {
                 targetUserInfoDict[pushedChat.id] = targetUserInfo
-                return pushedChat
+                return decodedPushedChat
             }
             return nil
 		} catch {
@@ -226,22 +230,24 @@ extension ChatStore {
     
     // MARK: -Chat CRUD
     func addChat(_ chat: Chat) async {
+        let encodedChat: Chat = .encodedChat(with: chat)
         do {
             try db.collection(const.COLLECTION_CHAT)
                 .document(chat.id)
-                .setData(from: chat.self)
+                .setData(from: encodedChat.self)
         } catch {
             print("Error-\(#file)-\(#function) : \(error.localizedDescription)")
         }
     }
     
     func updateChat(_ chat: Chat) async {
+        let encodedChat: Chat = .encodedChat(with: chat)
         do {
             try await db.collection(const.COLLECTION_CHAT)
                 .document(chat.id)
-                .updateData([const.FIELD_LAST_CONTENT_DATE : chat.lastContentDate,
-                             const.FIELD_LAST_CONTENT : chat.lastContent,
-                             const.FIELD_UNREAD_MESSAGE_COUNT : chat.unreadMessageCount])
+                .updateData([const.FIELD_LAST_CONTENT_DATE : encodedChat.lastContentDate,
+                             const.FIELD_LAST_CONTENT : encodedChat.lastContent,
+                             const.FIELD_UNREAD_MESSAGE_COUNT : encodedChat.unreadMessageCount])
         } catch {
             print("Error-\(#file)-\(#function) : \(error.localizedDescription)")
         }
diff --git a/GitSpace/Sources/ViewModels/KnockHistory/KnockViewManager.swift b/GitSpace/Sources/ViewModels/KnockHistory/KnockViewManager.swift
index e1cee18c..f330d9ef 100644
--- a/GitSpace/Sources/ViewModels/KnockHistory/KnockViewManager.swift
+++ b/GitSpace/Sources/ViewModels/KnockHistory/KnockViewManager.swift
@@ -192,11 +192,21 @@ extension KnockViewManager {
 		searchText: String,
 		userSelectedTab: String
 	) -> Bool {
-		if isSearching, userSelectedTab == Constant.KNOCK_RECEIVED { // 검색중 + 내 수신함
-																	 // 현재 내가 선택한 필터 옵션과 같아야 하고, 내 수신함에는 보낸 사람의 정보를 가져야 한다.
-			return knock.knockStatus == equalsToKnockStatus && knock.sentUserName.contains(searchText, isCaseInsensitive: true)
+		if isSearching,
+           userSelectedTab == Constant.KNOCK_RECEIVED {
+            // 검색중 + 내 수신함
+            // 현재 내가 선택한 필터 옵션과 같아야 하고, 내 수신함에는 보낸 사람의 정보를 가져야 한다.
+			return knock.knockStatus == equalsToKnockStatus &&
+            knock.sentUserName.contains(
+                searchText,
+                isCaseInsensitive: true
+            )
 		} else if isSearching, userSelectedTab == Constant.KNOCK_SENT { // 검색중 + 내 발신함
-			return knock.knockStatus == equalsToKnockStatus && knock.receivedUserName.contains(searchText, isCaseInsensitive: true)
+			return knock.knockStatus == equalsToKnockStatus &&
+            knock.receivedUserName.contains(
+                searchText,
+                isCaseInsensitive: true
+            )
 		} else if userSelectedTab == Constant.KNOCK_RECEIVED {
 			return knock.knockStatus == equalsToKnockStatus
 		} else if userSelectedTab == Constant.KNOCK_SENT {
@@ -205,7 +215,10 @@ extension KnockViewManager {
 		return false
 	}
     
-    public func sortedByDateValue(lhs: Knock, rhs: Knock) -> Bool {
+    public func sortedByDateValue(
+        lhs: Knock,
+        rhs: Knock
+    ) -> Bool {
         lhs.knockedDate.dateValue() > rhs.knockedDate.dateValue()
     }
 }
@@ -225,16 +238,34 @@ extension KnockViewManager {
                 snapshot.documentChanges.forEach { docDiff in
                     switch docDiff.type {
                     case .added:
-                        if let newKnock = self.decodeKnockElementForListener(with: docDiff, currentUser: currentUser) {
-                            self.appendKnockElementInTempList(newKnock: newKnock, currentUser: currentUser)
+                        if let newKnock = self.decodeKnockElementForListener(
+                            with: docDiff,
+                            currentUser: currentUser
+                        ) {
+                            self.appendKnockElementInTempList(
+                                newKnock: newKnock,
+                                currentUser: currentUser
+                            )
                         }
                     case .modified:
-                        if let diffKnock = self.decodeKnockElementForListener(with: docDiff, currentUser: currentUser) {
-                            self.updateTempKnockList(diffKnock: diffKnock, currentUser: currentUser)
+                        if let diffKnock = self.decodeKnockElementForListener(
+                            with: docDiff,
+                            currentUser: currentUser
+                        ) {
+                            self.updateTempKnockList(
+                                diffKnock: diffKnock,
+                                currentUser: currentUser
+                            )
                         }
                     case .removed:
-                        if let removedKnock = self.decodeKnockElementForListener(with: docDiff, currentUser: currentUser) {
-                            self.removeKnocksInTempKnockList(removedKnock: removedKnock, currentUser: currentUser)
+                        if let removedKnock = self.decodeKnockElementForListener(
+                            with: docDiff,
+                            currentUser: currentUser
+                        ) {
+                            self.removeKnocksInTempKnockList(
+                                removedKnock: removedKnock,
+                                currentUser: currentUser
+                            )
                         }
                     }
                 }
@@ -268,6 +299,7 @@ extension KnockViewManager {
 	
 	/**
      1. 만들어진 노크를 DB에 등록합니다.
+     - Important: User Created Contents는 모두 Base String으로 콘솔에 저장됩니다.
      */
 	public func createKnockOnFirestore(knock: Knock) async -> Void {
 		let document = firebaseDatabase.document("\(knock.id)")
@@ -276,10 +308,10 @@ extension KnockViewManager {
 			try await document.setData([
 				"id": knock.id,
 				"knockedDate": knock.knockedDate,
-				"declineMessage": knock.declineMessage ?? "",
+                "declineMessage": knock.declineMessage?.asBase64 ?? "",
 				"knockCategory": knock.knockCategory,
 				"knockStatus": Constant.KNOCK_WAITING,
-				"knockMessage": knock.knockMessage,
+                "knockMessage": knock.knockMessage.asBase64 ?? "암호화",
 				"receivedUserName": knock.receivedUserName,
 				"sentUserName": knock.sentUserName,
 				"sentUserID": knock.sentUserID,
@@ -312,7 +344,8 @@ extension KnockViewManager {
                 let isKnockMessageEdited,
                 isKnockMessageEdited {
                 try await document.updateData([
-                    "knockMessage": knock.knockMessage
+                    // !!!: base String으로 콘솔 저장
+                    "knockMessage": knock.knockMessage.asBase64 ?? ""
                 ])
             }
             
@@ -326,7 +359,8 @@ extension KnockViewManager {
             case Constant.KNOCK_DECLINED:
                 try await document.setData([
                     "declinedDate": Timestamp(date: .now),
-                    "declineMessage": declineMessage ?? "\(knock.receivedUserName) decided not to give you a decline message."
+                    // !!!: base String으로 콘솔 저장
+                    "declineMessage": declineMessage?.asBase64 ?? "\(knock.receivedUserName) decided not to give you a decline message."
                 ], merge: true)
                 
             default:
diff --git a/GitSpace/Sources/ViewModels/MessageViewModel.swift b/GitSpace/Sources/ViewModels/MessageViewModel.swift
index 3b6b376f..4f35bc35 100644
--- a/GitSpace/Sources/ViewModels/MessageViewModel.swift
+++ b/GitSpace/Sources/ViewModels/MessageViewModel.swift
@@ -84,7 +84,8 @@ extension MessageStore {
             for document in snapshot.documents {
                 do {
                     let message: Message = try document.data(as: Message.self)
-                    newMessages.append(message)
+                    let decodedMessage: Message = .decodedMessage(with: message)
+                    newMessages.append(decodedMessage)
                 } catch {
                     print("Error-\(#file)-\(#function) : \(error.localizedDescription)")
                 }
@@ -95,19 +96,21 @@ extension MessageStore {
     
     // MARK: - Message CRUD
     func addMessage(_ message: Message, chatID: String) {
+        let encodedMessage: Message = .encodedMessage(with: message)
         do {
             try db
                 .collection(const.COLLECTION_CHAT)
                 .document(chatID)
                 .collection(const.COLLECTION_MESSAGE)
                 .document(message.id)
-                .setData(from: message.self)
+                .setData(from: encodedMessage.self)
         } catch {
             print("Error-\(#file)-\(#function) : \(error.localizedDescription)")
         }
     }
     
     func updateMessage(_ message: Message, chatID: String) async {
+        let encodedMessage: Message = .encodedMessage(with: message)
         do {
             try await db
                 .collection(const.COLLECTION_CHAT)
@@ -115,8 +118,8 @@ extension MessageStore {
                 .collection(const.COLLECTION_MESSAGE)
                 .document(message.id)
                 .updateData(
-                    [const.FIELD_TEXT_CONTENT : message.textContent,
-                     const.FIELD_SENT_DATE : message.sentDate])
+                    [const.FIELD_TEXT_CONTENT : encodedMessage.textContent,
+                     const.FIELD_SENT_DATE : encodedMessage.sentDate])
         } catch {
             print("Error-\(#file)-\(#function) : \(error.localizedDescription)")
         }
@@ -143,7 +146,8 @@ extension MessageStore {
     func fetchNewMessage(change : QueryDocumentSnapshot) -> Message? {
         do {
             let newMessage = try change.data(as: Message.self)
-            return newMessage
+            let decodedNewMessage: Message = .decodedMessage(with: newMessage)
+            return decodedNewMessage
         } catch {
             print("Error-\(#file)-\(#function) : \(error.localizedDescription)")
         }
diff --git a/GitSpace/Sources/ViewModels/TagViewModel.swift b/GitSpace/Sources/ViewModels/TagViewModel.swift
index 57881ca6..404c28d5 100644
--- a/GitSpace/Sources/ViewModels/TagViewModel.swift
+++ b/GitSpace/Sources/ViewModels/TagViewModel.swift
@@ -31,7 +31,12 @@ final class TagViewModel: ObservableObject {
                 let id = document[const.FIELD_ID] as? String ?? ""
                 let tagName = document[const.FIELD_TAGNAME] as? String ?? ""
                 let repositories = document[const.FIELD_REPOSITORIES] as? [String] ?? []
-                self.tags.append( Tag(id: id, tagName: tagName, repositories: repositories) )
+                /// 이미 사용 중인 사용자들의 Tag 데이터는 약식 암호화가 적용되지 않아서 임시로 분기 처리함.
+                if let decodedTagName = tagName.decodedBase64String {
+                    self.tags.append(Tag(id: id, tagName: decodedTagName, repositories: repositories))
+                } else {
+                    self.tags.append(Tag(id: id, tagName: tagName, repositories: repositories))
+                }
             }
         } catch {
             print("Error-\(#file)-\(#function): \(error.localizedDescription)")
@@ -43,14 +48,15 @@ final class TagViewModel: ObservableObject {
     func registerTag(tagName: String) async -> Tag? {
         do {
             let tid = UUID().uuidString
+            guard let encodeTagName = tagName.asBase64 else { return nil }
             try await database.collection(const.COLLECTION_USER_INFO)
                 .document(Auth.auth().currentUser?.uid ?? "")
                 .collection(const.COLLECTION_TAG)
                 .document(tid)
                 .setData([
                     const.FIELD_ID: tid,
-                    const.FIELD_TAGNAME: tagName,
-                    const.FIELD_REPOSITORIES: []
+                    const.FIELD_TAGNAME: encodeTagName,
+                    const.FIELD_REPOSITORIES: Array<String>()
                 ])
             return Tag(id: tid, tagName: tagName, repositories: [])
         } catch {
@@ -73,7 +79,6 @@ final class TagViewModel: ObservableObject {
         }
     }
     
-    // FIXME: 수정 시나리오 완성 후 메서드 구현
     /*
     // MARK: Update Custom Tag
     /// 특정 사용자 태그를 수정합니다.
@@ -96,9 +101,14 @@ final class TagViewModel: ObservableObject {
                 .getDocuments()
             for document in snapshot.documents {
                 let id = document.data()[const.FIELD_ID] as? String ?? ""
-                let name = document.data()[const.FIELD_TAGNAME] as? String ?? ""
+                let tagName = document.data()[const.FIELD_TAGNAME] as? String ?? ""
                 let repositories = document.data()[const.FIELD_REPOSITORIES] as? [String] ?? []
-                tagNameList.append(Tag(id: id, tagName: name, repositories: repositories))
+                /// 이미 사용 중인 사용자들의 Tag 데이터는 약식 암호화가 적용되지 않아서 임시로 분기 처리함.
+                if let decodedTagName = tagName.decodedBase64String {
+                    tagNameList.append(Tag(id: id, tagName: decodedTagName, repositories: repositories))
+                } else {
+                    tagNameList.append(Tag(id: id, tagName: tagName, repositories: repositories))
+                }
             }
             return tagNameList
         } catch {
@@ -125,7 +135,6 @@ final class TagViewModel: ObservableObject {
         }
     }
     
-    // FIXME: 정말 필요한 함수인지 확인하기
     /*
     // MARK: Update Repository Tag
     /// 선택된 레포지토리의 태그를 수정합니다.
diff --git a/GitSpace/Sources/Views/Chat/ChatRoom/ChatRoomKnockSection.swift b/GitSpace/Sources/Views/Chat/ChatRoom/ChatRoomKnockSection.swift
index 067f25d4..f63bb1dc 100644
--- a/GitSpace/Sources/Views/Chat/ChatRoom/ChatRoomKnockSection.swift
+++ b/GitSpace/Sources/Views/Chat/ChatRoom/ChatRoomKnockSection.swift
@@ -14,7 +14,8 @@ struct ChatDetailKnockSection: View {
     
     var body: some View {
         VStack(spacing: 10) {
-            GSText.CustomTextView(style: .sectionTitle, string: chat.knockContentDateAsString)
+            GSText.CustomTextView(style: .sectionTitle,
+                                  string: chat.knockContentDateAsString)
                 .padding(.bottom, 10)
             
             HStack {
@@ -36,16 +37,12 @@ struct ChatDetailKnockSection: View {
             
             GSCanvas.CustomCanvasView(style: .primary) {
                 HStack {
-                    Spacer()
-                    GSText.CustomTextView(style: .body1, string: chat.knockContent)
-                    Spacer()
+                    GSText.CustomTextView(style: .body1,
+                                          string: chat.knockContent)
+                    .frame(maxWidth: .infinity)
                 }
             }
             .padding(.horizontal, 20)
-            
-//            Text(chat.knockContent)
-//                .modifier(KnockMessageModifier())
-           
         }
     }
 }
diff --git a/GitSpace/Sources/Views/Home/AddTagSheetView.swift b/GitSpace/Sources/Views/Home/AddTagSheetView.swift
index fcc1c767..a7a7466b 100644
--- a/GitSpace/Sources/Views/Home/AddTagSheetView.swift
+++ b/GitSpace/Sources/Views/Home/AddTagSheetView.swift
@@ -179,7 +179,6 @@ struct AddTagSheetView: View {
                                 items: Array( zip(tagViewModel.tags.indices.reversed(), tagViewModel.tags.reversed())) ) { index, tag in
                                 GSButton.CustomButtonView(
                                     style: .tag(
-//                                        isAppliedInView: selectedTags.contains(tag),
                                         isSelectedInAddTagSheet: selectedTags.contains{ $0.id == tag.id }
                                     )
                                 ) {
diff --git a/GitSpace/Sources/Views/Home/StarredView.swift b/GitSpace/Sources/Views/Home/StarredView.swift
index 8e7c53b3..f29cef86 100644
--- a/GitSpace/Sources/Views/Home/StarredView.swift
+++ b/GitSpace/Sources/Views/Home/StarredView.swift
@@ -79,7 +79,6 @@ struct StarredView: View {
                             GSButton.CustomButtonView(
                                 style: .tag(
                                     isAppliedInView: true
-//                                    isSelectedInAddTagSheet: false
                                 )
                             ) {
                                 withAnimation {
diff --git a/GitSpace/Sources/Views/Knock/MainKnockBox/EachKnockCell.swift b/GitSpace/Sources/Views/Knock/MainKnockBox/EachKnockCell.swift
index 16b8336a..9e8da97a 100644
--- a/GitSpace/Sources/Views/Knock/MainKnockBox/EachKnockCell.swift
+++ b/GitSpace/Sources/Views/Knock/MainKnockBox/EachKnockCell.swift
@@ -90,7 +90,8 @@ struct EachKnockCell: View {
                     .id(eachKnock.id)
                     
                     HStack {
-                        Text(eachKnock.knockMessage)
+                        // !!!: base String을 decode
+                        Text(eachKnock.knockMessage.decodedBase64String ?? "복호화")
                             .lineLimit(1)
                         
                         Spacer()
diff --git a/GitSpace/Sources/Views/Knock/MainKnockBox/KnockHistoryView.swift b/GitSpace/Sources/Views/Knock/MainKnockBox/KnockHistoryView.swift
index 249b7bd7..c5c34c18 100644
--- a/GitSpace/Sources/Views/Knock/MainKnockBox/KnockHistoryView.swift
+++ b/GitSpace/Sources/Views/Knock/MainKnockBox/KnockHistoryView.swift
@@ -74,7 +74,6 @@ struct KnockHistoryView: View {
                     TextEditor(text: $editedKnockMessage)
                         .autocorrectionDisabled()
                         .textInputAutocapitalization(.never)
-                        .foregroundColor(.black)
                         .textEditorBackgroundClear()
                         .frame(
                             maxWidth: UIScreen.main.bounds.width / 1.2,
@@ -93,7 +92,7 @@ struct KnockHistoryView: View {
                             withAnimation {
                                 endTextEditing()
                                 isEditingKnockMessage.toggle()
-                                editedKnockMessage = eachKnock.knockMessage
+                                editedKnockMessage = eachKnock.knockMessage.decodedBase64String ?? "복호화"
                             }
                         } label: {
                             Text("Cancel")
@@ -145,7 +144,7 @@ struct KnockHistoryView: View {
             } else {
                 VStack(alignment: .leading) {
                     HStack {
-                        Text("\(eachKnock.knockMessage)")
+                        Text("\(eachKnock.knockMessage.decodedBase64String ?? "복호화")")
                             .font(.callout)
                             .foregroundColor(Color.black)
                     }
@@ -343,7 +342,7 @@ struct KnockHistoryView: View {
     }
     
     private func assignKnockMessageIntoEditState() {
-        editedKnockMessage = eachKnock.knockMessage
+        editedKnockMessage = eachKnock.knockMessage.decodedBase64String ?? "복호화"
     }
     
     private func assignChatWithChatID() async {
diff --git a/GitSpace/Sources/Views/Knock/MainKnockBox/ReceivedKnockDetailView.swift b/GitSpace/Sources/Views/Knock/MainKnockBox/ReceivedKnockDetailView.swift
index 405116aa..69b69b76 100644
--- a/GitSpace/Sources/Views/Knock/MainKnockBox/ReceivedKnockDetailView.swift
+++ b/GitSpace/Sources/Views/Knock/MainKnockBox/ReceivedKnockDetailView.swift
@@ -97,6 +97,7 @@ struct ReceivedKnockDetailView: View {
                     /// 3. 메세지 내용
                     VStack(alignment: .leading) {
                         HStack {
+                            // !!!: base String decode
                             Text("\(knock.knockMessage)")
                                 .font(.callout)
                                 .foregroundColor(Color.black)
@@ -269,7 +270,8 @@ struct ReceivedKnockDetailView: View {
             ],
             lastContent: "",
             lastContentDate: .now,
-            knockContent: knock.knockMessage,
+            // !!!: Decoded
+            knockContent: knock.knockMessage.decodedBase64String ?? "",
             knockContentDate: knock.knockedDate.dateValue(),
             unreadMessageCount: [
                 userStore.currentUser?.id ?? "": 0,
@@ -278,15 +280,18 @@ struct ReceivedKnockDetailView: View {
         )
     }
     
-    private func makeNewChat() -> Chat {
-        return Chat.init(id: UUID().uuidString,
-                         createdDate: .now,
-                         joinedMemberIDs: [knock.sentUserID, knock.receivedUserID],
-                         lastContent: "",
-                         lastContentDate: .now,
-                         knockContent: knock.knockMessage,
-                         knockContentDate: knock.knockedDate.dateValue(),
-                         unreadMessageCount: [knock.sentUserID : 0, knock.receivedUserID : 0])
+    private func makeNewChat() -> Chat  {
+        return Chat.init(
+            id: UUID().uuidString,
+            createdDate: .now,
+            joinedMemberIDs: [knock.sentUserID, knock.receivedUserID],
+            lastContent: "",
+            lastContentDate: .now,
+            // !!!: Decoded
+            knockContent: knock.knockMessage.decodedBase64String ?? "",
+            knockContentDate: knock.knockedDate.dateValue(),
+            unreadMessageCount: [knock.sentUserID : 0, knock.receivedUserID : 0]
+        )
     }
 }
 //
diff --git a/GitSpace/Sources/Views/Knock/SendKnock/AfterSendKnockSection.swift b/GitSpace/Sources/Views/Knock/SendKnock/AfterSendKnockSection.swift
index ac65d7ac..e5fba6f5 100644
--- a/GitSpace/Sources/Views/Knock/SendKnock/AfterSendKnockSection.swift
+++ b/GitSpace/Sources/Views/Knock/SendKnock/AfterSendKnockSection.swift
@@ -44,19 +44,22 @@ struct AfterSendKnockSection: View {
             }
             .padding(.leading, 20)
             
-            GSCanvas.CustomCanvasView.init(
+            GSCanvas.CustomCanvasView(
                 style: .primary,
                 content: {
                     HStack {
                         Spacer()
                         GSText.CustomTextView(
                             style: .captionPrimary1,
-                            string: "\(knockViewManager.newKnock?.knockMessage ?? "")")
+                            string: "\(knockViewManager.newKnock?.knockMessage.decodedBase64String ?? "")")
                         Spacer()
                     }
                 })
             .padding(.horizontal, 20)
             .padding(.vertical, 5)
+            .onAppear {
+                print("DECODED?", knockViewManager.newKnock?.knockMessage.decodedBase64String)
+            }
         }
     }
 }
diff --git a/GitSpace/Sources/Views/Knock/SendKnock/SendKnockTextEditSection.swift b/GitSpace/Sources/Views/Knock/SendKnock/SendKnockTextEditSection.swift
index 8211fcf9..f61d802d 100644
--- a/GitSpace/Sources/Views/Knock/SendKnock/SendKnockTextEditSection.swift
+++ b/GitSpace/Sources/Views/Knock/SendKnock/SendKnockTextEditSection.swift
@@ -78,7 +78,6 @@ struct SendKnockTextEditSection: View {
                             // Assign New Knock On Model
                             knockViewManager.assignNewKnock(newKnock: newKnock)
                             
-                            // TODO: 알람 보내기
                             // 새로운 노크가 생성될 때의 Push Notification 전달
                             await pushNotificationManager.sendNotification(
                                 with: .knock(
diff --git a/GitSpace/Sources/Views/Knock/SendKnock/SendKnockView.swift b/GitSpace/Sources/Views/Knock/SendKnock/SendKnockView.swift
index 75af0263..fc8b28dd 100644
--- a/GitSpace/Sources/Views/Knock/SendKnock/SendKnockView.swift
+++ b/GitSpace/Sources/Views/Knock/SendKnock/SendKnockView.swift
@@ -39,7 +39,7 @@ struct SendKnockView: View {
             if let targetUserInfo {
                 ScrollViewReader { proxy in
                     ScrollView {
-                        HStack {}.id(topID)
+                        HStack { }.id(topID)
                         VStack(alignment: .center, spacing: 10) {
                             TopperProfileView(
                                 targetUserInfo: targetUserInfo
@@ -101,8 +101,7 @@ struct SendKnockView: View {
                             
                         }
                         
-                        HStack {
-                        }
+                        HStack { }
                         .id(bottomID)
                         .frame(height: isKnockSent ? 5 : 280)
                     }
diff --git a/GitSpace/Utilities/Extensions/String+.swift b/GitSpace/Utilities/Extensions/String+.swift
index 940916ae..f92bd2e5 100644
--- a/GitSpace/Utilities/Extensions/String+.swift
+++ b/GitSpace/Utilities/Extensions/String+.swift
@@ -27,7 +27,20 @@ extension String {
         return date
     }
     
+    /// Base64 인코딩
+    public var asBase64: String? {
+        let utf8Data = self.data(using: .utf8)
+        return utf8Data?.base64EncodedString()
+    }
+    
+    /// Base64 디코딩
+    public var decodedBase64String: String? {
+        let data: Data? = Data(base64Encoded: self)
+        guard let data else { return nil }
+        return String(data: data, encoding: .utf8)
+      
     public func isValidPattern(pattern: String) -> Bool {
         return self.range(of: pattern, options: .regularExpression) != nil
+
     }
 }