diff --git a/app/components/Call/Call.tsx b/app/components/Call/Call.tsx
index aa63880..7538217 100644
--- a/app/components/Call/Call.tsx
+++ b/app/components/Call/Call.tsx
@@ -3,8 +3,9 @@ import { useAvatars } from "@/app/providers/AvatarProvider/useAvatars";
 import { CallContextValue, CallState } from "@/app/providers/CallProvider/CallProvider";
 import { translateDurationToTime } from "@/app/providers/CallProvider/translateDurationTime";
 import { useUserInformation } from "@/app/providers/InformationProvider/useUserInformation";
-import { Avatar, Box, Flex, Text } from "@mantine/core";
+import { Avatar, Box, Flex, Popover, Text, useMantineTheme } from "@mantine/core";
 import { IconChevronLeft, IconMicrophone, IconMicrophoneOff, IconPhone, IconPhoneX, IconQrcode, IconVolume, IconVolumeOff, IconX } from "@tabler/icons-react";
+import { KeyImage } from "../KeyImage/KeyImage";
 
 export interface CallProps {
     context: CallContextValue;
@@ -20,10 +21,14 @@ export function Call(props: CallProps) {
         setSound,
         setMuted, 
         setShowCallView,
-        muted} = props.context;
+        muted,
+        getKeyCast,
+        accept
+    } = props.context;
     const [userInfo] = useUserInformation(activeCall);
     const avatars = useAvatars(activeCall);
     const colors = useRosettaColors();
+    const theme = useMantineTheme();
 
     return (
         <Box pos={'absolute'} top={0} left={0} w={'100%'} h={'100vh'} style={{
@@ -39,7 +44,25 @@ export function Call(props: CallProps) {
                         <Text fw={500}>Back</Text>
                     </Flex>
                     <Flex>
-                        <IconQrcode size={24}></IconQrcode>
+                        <Popover width={300} withArrow>
+                            <Popover.Target>
+                                <IconQrcode size={24}></IconQrcode>
+                            </Popover.Target>
+                            <Popover.Dropdown p={'xs'}>
+                                <Flex direction={'row'} align={'center'} gap={'xs'}>
+                                    <Text maw={300} c={'dimmed'} fz={'xs'}>
+                                        This call is secured by 256 bit end-to-end encryption. Only you and the recipient can read or listen to the content of this call.
+                                    </Text>
+                                    <KeyImage radius={0} colors={[
+                                        theme.colors.blue[1],
+                                        theme.colors.blue[2],
+                                        theme.colors.blue[3],
+                                        theme.colors.blue[4],
+                                        theme.colors.blue[5]
+                                    ]} size={80} keyRender={getKeyCast()}></KeyImage>   
+                                </Flex>
+                            </Popover.Dropdown>
+                        </Popover>
                     </Flex>
                 </Flex>
                 <Flex direction={'column'} mt={'xl'} style={{
@@ -50,8 +73,9 @@ export function Call(props: CallProps) {
                     {callState == CallState.ACTIVE && (<Text fz={14} c={'#FFF'}>{translateDurationToTime(duration)}</Text>)}
                     {callState == CallState.CONNECTING && (<Text fz={14} c={'#FFF'}>Connecting...</Text>)}
                     {callState == CallState.INCOMING && (<Text fz={14} c={'#FFF'}>Incoming call...</Text>)}
+                    {callState == CallState.KEY_EXCHANGE && (<Text fz={14} c={'#FFF'}>Exchanging encryption keys...</Text>)}
                     <Flex gap={'xl'} align={'center'} justify={'center'} mt={'xl'}>
-                        {callState == CallState.ACTIVE || callState == CallState.CONNECTING && (
+                        {callState == CallState.ACTIVE || callState == CallState.CONNECTING || callState == CallState.KEY_EXCHANGE && (
                             <>
                                 <Box w={50} onClick={() => setSound(!sound)} style={{
                                     borderRadius: 25,
@@ -93,7 +117,7 @@ export function Call(props: CallProps) {
                                         </Flex>
                                     </Box>
                                 )}
-                                <Box w={userInfo.title != "Rosetta" ? 50 : 100} onClick={close} style={{
+                                <Box w={userInfo.title != "Rosetta" ? 50 : 100} onClick={accept} style={{
                                     borderRadius: '50%',
                                     cursor: 'pointer'
                                 }} h={userInfo.title != "Rosetta" ? 50 : 100} bg={colors.success}>
diff --git a/app/dev.html b/app/dev.html
index 969a459..dd03527 100644
--- a/app/dev.html
+++ b/app/dev.html
@@ -6,6 +6,9 @@
   </head>
   <body>
     <div id="app"></div>
+    <script>
+      window.global = window;
+    </script>
     <script type="module" src="/renderer.tsx"></script>
   </body>
 </html>
diff --git a/app/providers/CallProvider/CallProvider.tsx b/app/providers/CallProvider/CallProvider.tsx
index e532c14..57e3743 100644
--- a/app/providers/CallProvider/CallProvider.tsx
+++ b/app/providers/CallProvider/CallProvider.tsx
@@ -1,5 +1,11 @@
 import { Call } from "@/app/components/Call/Call";
-import { createContext, useState } from "react";
+import { useConsoleLogger } from "@/app/hooks/useConsoleLogger";
+import { createContext, useEffect, useRef, useState } from "react";
+import nacl from 'tweetnacl';
+import { useSender } from "../ProtocolProvider/useSender";
+import { PacketSignal, SignalType } from "../ProtocolProvider/protocol/packets/packet.signal";
+import { usePacket } from "../ProtocolProvider/usePacket";
+import { usePublicKey } from "../AccountProvider/usePublicKey";
 
 
 export interface CallContextValue {
@@ -13,15 +19,29 @@ export interface CallContextValue {
     setSound: (sound: boolean) => void;
     duration: number;
     setShowCallView: (show: boolean) => void;
+    getKeyCast: () => string;
+    accept: () => void;
 }
 
 export enum CallState {
     CONNECTING,
+    KEY_EXCHANGE,
     ACTIVE,
     ENDED,
     INCOMING
 }
 
+export enum CallRole {
+    /**
+     * Вызывающая сторона, которая инициирует звонок
+     */
+    CALLER,
+    /**
+     * Принимающая сторона, которая отвечает на звонок и принимает его
+     */
+    CALLEE
+}
+
 export const CallContext = createContext<CallContextValue | null>(null);
 export interface CallProviderProps {
     children: React.ReactNode;
@@ -34,18 +54,142 @@ export function CallProvider(props : CallProviderProps) {
     const [sound, setSound] = useState<boolean>(true);
     const [duration, setDuration] = useState<number>(0);
     const [showCallView, setShowCallView] = useState<boolean>(callState == CallState.INCOMING);
+    const {info} = useConsoleLogger("CallProvider");
+    const [sessionKeys, setSessionKeys] = useState<nacl.BoxKeyPair | null>(null);
+    const send = useSender();
+    const publicKey = usePublicKey();
+
+    const roleRef = useRef<CallRole | null>(null);
+    const [sharedSecret, setSharedSecret] = useState<string>("");
+
+    useEffect(() => {
+        console.info("TRACE -> ", sharedSecret)
+    }, [sharedSecret]);
+
+    usePacket(26, (packet: PacketSignal) => {
+        const signalType = packet.getSignalType();
+        if(activeCall){
+            /**
+             * У нас уже есть активный звонок, игнорируем все сигналы, кроме сигналов от текущего звонка
+             */
+            if(packet.getSrc() != activeCall){
+                info("Received signal for another call, ignoring");
+                return;
+            }
+        }
+        if(signalType == SignalType.CALL){
+            /**
+             * Нам поступает звонок
+             */
+            setActiveCall(packet.getSrc());
+            setCallState(CallState.INCOMING);
+            setShowCallView(true);
+        }
+        if(signalType == SignalType.KEY_EXCHANGE && roleRef.current == CallRole.CALLER){
+            /**
+             * Другая сторона сгенерировала ключи для сессии и отправила нам публичную часть, 
+             * теперь мы можем создать общую секретную сессию для шифрования звонка
+             */
+            const sharedPublic = packet.getSharedPublic();
+            if(!sharedPublic){
+                info("Received key exchange signal without shared public key");
+                return;
+            }
+            const sessionKeys = generateSessionKeys();
+            const computedSharedSecret = nacl.box.before(Buffer.from(sharedPublic, 'hex'), sessionKeys.secretKey);
+            setSharedSecret(Buffer.from(computedSharedSecret).toString('hex'));
+            info("Generated shared secret for call session: " + Buffer.from(computedSharedSecret).toString('hex'));
+            /**
+             * Нам нужно отправить свой публичный ключ другой стороне, чтобы она тоже могла создать общую секретную сессию
+             */
+            const signalPacket = new PacketSignal();
+            signalPacket.setSrc(publicKey);
+            signalPacket.setDst(packet.getDst());
+            signalPacket.setSignalType(SignalType.KEY_EXCHANGE);
+            signalPacket.setSharedPublic(Buffer.from(sessionKeys.publicKey).toString('hex'));
+            send(signalPacket);
+        }
+        if(signalType == SignalType.KEY_EXCHANGE && roleRef.current == CallRole.CALLEE){
+            /**
+             * Мы отправили свою публичную часть ключа другой стороне, 
+             * теперь мы получили ее публичную часть и можем создать общую 
+             * секретную сессию для шифрования звонка
+             */
+            const sharedPublic = packet.getSharedPublic();
+            if(!sharedPublic){
+                info("Received key exchange signal without shared public key");
+                return;
+            }
+            if(!sessionKeys){
+                info("Received key exchange signal but session keys are not generated");
+                return;
+            }
+            const computedSharedSecret = nacl.box.before(Buffer.from(sharedPublic, 'hex'), sessionKeys.secretKey);
+            info("Generated shared secret for call session: " + Buffer.from(computedSharedSecret).toString('hex'));
+            setSharedSecret(Buffer.from(computedSharedSecret).toString('hex'));
+        }
+        if(signalType == SignalType.ACTIVE_CALL) {
+            setCallState(CallState.ACTIVE);
+        }
+    }, []);
+
+    const generateSessionKeys = () => {
+        const sessionKeys = nacl.box.keyPair();
+        info("Generated keys for call session, len: " + sessionKeys.publicKey.length);
+        setSessionKeys(sessionKeys);
+        return sessionKeys;
+    }
 
     const call = (dialog: string) => {
         setActiveCall(dialog);
         setCallState(CallState.CONNECTING);
         setShowCallView(true);
+        const signalPacket = new PacketSignal();
+        signalPacket.setDst(dialog);
+        signalPacket.setSignalType(SignalType.CALL);
+        send(signalPacket);
+        roleRef.current = CallRole.CALLER;
     }
 
     const close = () => {
         setActiveCall("");
         setCallState(CallState.ENDED);
         setShowCallView(false);
+        setSessionKeys(null);
         setDuration(0);
+        roleRef.current = null;
+    }
+
+    const accept = () => {
+        if(callState != CallState.INCOMING){
+            /**
+             * Нечего принимать
+             */
+            return;
+        }
+        /**
+         * Звонок принят, генерируем ключи для сессии и отправляем их другой стороне для установления защищенного канала связи
+         */
+        const keys = generateSessionKeys();
+        const signalPacket = new PacketSignal();
+        signalPacket.setDst(activeCall);
+        signalPacket.setSignalType(SignalType.KEY_EXCHANGE);
+        signalPacket.setSharedPublic(Buffer.from(keys.publicKey).toString('hex'));
+        send(signalPacket);
+        setCallState(CallState.KEY_EXCHANGE);
+        roleRef.current = CallRole.CALLEE;
+    }
+
+    /**
+     * Получает слепок ключа для отображения в UI
+     * чтобы не показывать настоящий ключ
+     * @returns 
+     */
+    const getKeyCast = () => {
+        if(!sessionKeys){
+            return "";
+        }
+        return Buffer.from(sessionKeys.secretKey).toString('hex');
     }
 
     const context = { 
@@ -58,7 +202,9 @@ export function CallProvider(props : CallProviderProps) {
         setMuted,
         setSound,
         duration,
-        setShowCallView
+        setShowCallView,
+        getKeyCast,
+        accept
     };
 
     return (
diff --git a/app/providers/ProtocolProvider/protocol/packets/packet.signal.ts b/app/providers/ProtocolProvider/protocol/packets/packet.signal.ts
new file mode 100644
index 0000000..5a6ce5f
--- /dev/null
+++ b/app/providers/ProtocolProvider/protocol/packets/packet.signal.ts
@@ -0,0 +1,83 @@
+import Packet from "../packet";
+import Stream from "../stream";
+
+export enum SignalType {
+    CALL = 1,
+    KEY_EXCHANGE = 2,
+    ACTIVE_CALL = 3,
+    END_CALL = 4
+}
+
+export class PacketSignal extends Packet {
+
+    private src: string = "";
+    /**
+     * Назначение
+     */
+    private dst: string = "";
+    /**
+     * Используется если SignalType == KEY_EXCHANGE, для идентификации сессии обмена ключами
+     */
+    private sharedPublic: string = "";
+
+    private signalType: SignalType = SignalType.CALL;
+
+
+    public getPacketId(): number {
+        return 26;
+    }
+
+    public _receive(stream: Stream): void {
+        this.signalType = stream.readInt8();
+        this.src = stream.readString();
+        this.dst = stream.readString();
+        if(this.signalType == SignalType.KEY_EXCHANGE){
+            this.sharedPublic = stream.readString();
+        }
+    }
+
+    public _send(): Promise<Stream> | Stream {
+        const stream = new Stream();
+        stream.writeInt16(this.getPacketId());
+        stream.writeInt8(this.signalType);
+        stream.writeString(this.src);
+        stream.writeString(this.dst);
+        if(this.signalType == SignalType.KEY_EXCHANGE){
+            stream.writeString(this.sharedPublic);
+        }
+        return stream;
+    }
+
+    public setDst(dst: string) {
+        this.dst = dst;
+    }
+
+    public setSharedPublic(sharedPublic: string) {
+        this.sharedPublic = sharedPublic;
+    }
+
+    public setSignalType(signalType: SignalType) {
+        this.signalType = signalType;
+    }
+
+    public getDst(): string {
+        return this.dst;
+    }
+
+    public getSharedPublic(): string {
+        return this.sharedPublic;
+    }
+
+    public getSignalType(): SignalType {
+        return this.signalType;
+    }
+
+    public getSrc(): string {
+        return this.src;
+    }
+
+    public setSrc(src: string) {
+        this.src = src;
+    }
+    
+}
\ No newline at end of file
diff --git a/app/providers/ProtocolProvider/protocol/protocol.ts b/app/providers/ProtocolProvider/protocol/protocol.ts
index 2189a6a..90d2fe0 100644
--- a/app/providers/ProtocolProvider/protocol/protocol.ts
+++ b/app/providers/ProtocolProvider/protocol/protocol.ts
@@ -25,6 +25,7 @@ import { PacketDeviceNew } from "./packets/packet.device.new";
 import { PacketDeviceList } from "./packets/packet.device.list";
 import { PacketDeviceResolve } from "./packets/packet.device.resolve";
 import { PacketSync } from "./packets/packet.sync";
+import { PacketSignal } from "./packets/packet.signal";
 
 export default class Protocol extends EventEmitter {
     private serverAddress: string;
@@ -125,6 +126,7 @@ export default class Protocol extends EventEmitter {
         this._supportedPackets.set(0x17, new PacketDeviceList());
         this._supportedPackets.set(0x18, new PacketDeviceResolve());
         this._supportedPackets.set(25, new PacketSync());
+        this._supportedPackets.set(26, new PacketSignal());
     }
 
     private _findWaiters(packetId: number): ((packet: Packet) => void)[] {
diff --git a/package.json b/package.json
index 4c591dc..16e87de 100644
--- a/package.json
+++ b/package.json
@@ -81,6 +81,8 @@
     "@noble/ciphers": "^1.2.1",
     "@noble/secp256k1": "^3.0.0",
     "@tabler/icons-react": "^3.31.0",
+    "@types/crypto-js": "^4.2.2",
+    "@types/diffie-hellman": "^5.0.3",
     "@types/elliptic": "^6.4.18",
     "@types/node-forge": "^1.3.11",
     "@types/npm": "^7.19.3",
@@ -90,7 +92,6 @@
     "bip39": "^3.1.0",
     "blurhash": "^2.0.5",
     "buffer": "^6.0.3",
-    "crypto-browserify": "^3.12.1",
     "crypto-js": "^4.2.0",
     "dayjs": "^1.11.13",
     "elliptic": "^6.6.1",
@@ -103,9 +104,11 @@
     "i": "^0.3.7",
     "jsencrypt": "^3.3.2",
     "jszip": "^3.10.1",
+    "libsodium": "^0.8.2",
     "lottie-react": "^2.4.1",
     "node-forge": "^1.3.1",
     "node-machine-id": "^1.1.12",
+    "npm": "^11.11.0",
     "pako": "^2.1.0",
     "react-router-dom": "^7.4.0",
     "react-syntax-highlighter": "^16.1.0",
@@ -115,6 +118,8 @@
     "recharts": "^2.15.1",
     "sql.js": "^1.13.0",
     "sqlite3": "^5.1.7",
+    "tweetnacl": "^1.0.3",
+    "tweetnacl-util": "^0.15.1",
     "wa-sqlite": "^1.0.0",
     "web-bip39": "^0.0.3"
   },