diff --git a/applications/lfrfid/helpers/decoder_ioprox.cpp b/applications/lfrfid/helpers/decoder_ioprox.cpp
new file mode 100644
index 000000000..7b44d3cea
--- /dev/null
+++ b/applications/lfrfid/helpers/decoder_ioprox.cpp
@@ -0,0 +1,107 @@
+#include "decoder_ioprox.h"
+#include <furi_hal.h>
+#include <cli/cli.h>
+#include <utility>
+
+constexpr uint32_t clocks_in_us = 64;
+
+constexpr uint32_t jitter_time_us = 20;
+constexpr uint32_t min_time_us = 64;
+constexpr uint32_t max_time_us = 80;
+constexpr uint32_t baud_time_us = 500;
+
+constexpr uint32_t min_time = (min_time_us - jitter_time_us) * clocks_in_us;
+constexpr uint32_t mid_time = ((max_time_us - min_time_us) / 2 + min_time_us) * clocks_in_us;
+constexpr uint32_t max_time = (max_time_us + jitter_time_us) * clocks_in_us;
+constexpr uint32_t baud_time = baud_time_us * clocks_in_us;
+
+bool DecoderIoProx::read(uint8_t* data, uint8_t data_size) {
+    bool result = false;
+    furi_assert(data_size >= 4);
+
+    if(ready) {
+        result = true;
+        ioprox.decode(raw_data, sizeof(raw_data), data, data_size);
+        ready = false;
+    }
+
+    return result;
+}
+
+void DecoderIoProx::process_front(bool is_rising_edge, uint32_t time) {
+    if(ready) {
+        return;
+    }
+
+    // Always track the time that's gone by.
+    current_period_duration += time;
+    demodulation_sample_duration += time;
+
+    // If a baud time has elapsed, we're at a sample point.
+    if(demodulation_sample_duration >= baud_time) {
+        // Start a new baud period...
+        demodulation_sample_duration = 0;
+        demodulated_value_invalid = false;
+
+        // ... and if we didn't have any baud errors, capture a sample.
+        if(!demodulated_value_invalid) {
+            store_data(current_demodulated_value);
+        }
+    }
+
+    //
+    // FSK demodulator.
+    //
+
+    // If this isn't a rising edge, this isn't a pulse of interest.
+    // We're done.
+    if(!is_rising_edge) {
+        return;
+    }
+
+    bool is_valid_low = (current_period_duration > min_time) &&
+                        (current_period_duration <= mid_time);
+    bool is_valid_high = (current_period_duration > mid_time) &&
+                         (current_period_duration < max_time);
+
+    // If this is between the minimum and our threshold, this is a logical 0.
+    if(is_valid_low) {
+        current_demodulated_value = false;
+    }
+    // Otherwise, if between our threshold and the max time, it's a logical 1.
+    else if(is_valid_high) {
+        current_demodulated_value = true;
+    }
+    // Otherwise, invalidate this sample.
+    else {
+        demodulated_value_invalid = true;
+    }
+
+    // We're starting a new period; track that.
+    current_period_duration = 0;
+}
+
+DecoderIoProx::DecoderIoProx() {
+    reset_state();
+}
+
+void DecoderIoProx::store_data(bool data) {
+    for(int i = 0; i < 7; ++i) {
+        raw_data[i] = (raw_data[i] << 1) | ((raw_data[i + 1] >> 7) & 1);
+    }
+    raw_data[7] = (raw_data[7] << 1) | data;
+
+    if(ioprox.can_be_decoded(raw_data, sizeof(raw_data))) {
+        ready = true;
+    }
+}
+
+void DecoderIoProx::reset_state() {
+    current_demodulated_value = false;
+    demodulated_value_invalid = false;
+
+    current_period_duration = 0;
+    demodulation_sample_duration = 0;
+
+    ready = false;
+}
diff --git a/applications/lfrfid/helpers/decoder_ioprox.h b/applications/lfrfid/helpers/decoder_ioprox.h
new file mode 100644
index 000000000..aff4a4778
--- /dev/null
+++ b/applications/lfrfid/helpers/decoder_ioprox.h
@@ -0,0 +1,26 @@
+#pragma once
+#include <stdint.h>
+#include <atomic>
+#include "protocols/protocol_ioprox.h"
+
+class DecoderIoProx {
+public:
+    bool read(uint8_t* data, uint8_t data_size);
+    void process_front(bool polarity, uint32_t time);
+    DecoderIoProx();
+
+private:
+    uint32_t current_period_duration = 0;
+    uint32_t demodulation_sample_duration = 0;
+
+    bool current_demodulated_value = false;
+    bool demodulated_value_invalid = false;
+
+    uint8_t raw_data[8] = {0};
+    void store_data(bool data);
+
+    std::atomic<bool> ready;
+
+    void reset_state();
+    ProtocolIoProx ioprox;
+};
diff --git a/applications/lfrfid/helpers/encoder_ioprox.cpp b/applications/lfrfid/helpers/encoder_ioprox.cpp
new file mode 100644
index 000000000..417799186
--- /dev/null
+++ b/applications/lfrfid/helpers/encoder_ioprox.cpp
@@ -0,0 +1,32 @@
+#include "encoder_ioprox.h"
+#include "protocols/protocol_ioprox.h"
+#include <furi.h>
+
+void EncoderIoProx::init(const uint8_t* data, const uint8_t data_size) {
+    ProtocolIoProx ioprox;
+    ioprox.encode(data, data_size, card_data, sizeof(card_data));
+    card_data_index = 0;
+}
+
+void EncoderIoProx::get_next(bool* polarity, uint16_t* period, uint16_t* pulse) {
+    uint8_t bit = (card_data[card_data_index / 8] >> (7 - (card_data_index % 8))) & 1;
+
+    bool advance = fsk->next(bit, period);
+    if(advance) {
+        card_data_index++;
+        if(card_data_index >= (8 * card_data_max)) {
+            card_data_index = 0;
+        }
+    }
+
+    *polarity = true;
+    *pulse = *period / 2;
+}
+
+EncoderIoProx::EncoderIoProx() {
+    fsk = new OscFSK(8, 10, 64);
+}
+
+EncoderIoProx::~EncoderIoProx() {
+    delete fsk;
+}
diff --git a/applications/lfrfid/helpers/encoder_ioprox.h b/applications/lfrfid/helpers/encoder_ioprox.h
new file mode 100644
index 000000000..568b40671
--- /dev/null
+++ b/applications/lfrfid/helpers/encoder_ioprox.h
@@ -0,0 +1,25 @@
+#pragma once
+#include "encoder_generic.h"
+#include "osc_fsk.h"
+
+class EncoderIoProx : public EncoderGeneric {
+public:
+    /**
+     * @brief init data to emulate
+     * 
+     * @param data 1 byte FC, 1 byte Version, 2 bytes code
+     * @param data_size must be 4
+     */
+    void init(const uint8_t* data, const uint8_t data_size) final;
+    void get_next(bool* polarity, uint16_t* period, uint16_t* pulse) final;
+    EncoderIoProx();
+    ~EncoderIoProx();
+
+private:
+    static const uint8_t card_data_max = 8;
+
+    uint8_t card_data[card_data_max];
+    uint8_t card_data_index;
+
+    OscFSK* fsk;
+};
diff --git a/applications/lfrfid/helpers/key_info.cpp b/applications/lfrfid/helpers/key_info.cpp
index ed2b20a90..4803cd6dc 100644
--- a/applications/lfrfid/helpers/key_info.cpp
+++ b/applications/lfrfid/helpers/key_info.cpp
@@ -12,6 +12,9 @@ const char* lfrfid_key_get_type_string(LfrfidKeyType type) {
     case LfrfidKeyType::KeyI40134:
         return "I40134";
         break;
+    case LfrfidKeyType::KeyIoProxXSF:
+        return "IoProxXSF";
+        break;
     }
 
     return "Unknown";
@@ -28,6 +31,8 @@ const char* lfrfid_key_get_manufacturer_string(LfrfidKeyType type) {
     case LfrfidKeyType::KeyI40134:
         return "Indala";
         break;
+    case LfrfidKeyType::KeyIoProxXSF:
+        return "Kantech";
     }
 
     return "Unknown";
@@ -42,6 +47,8 @@ bool lfrfid_key_get_string_type(const char* string, LfrfidKeyType* type) {
         *type = LfrfidKeyType::KeyH10301;
     } else if(strcmp("I40134", string) == 0) {
         *type = LfrfidKeyType::KeyI40134;
+    } else if(strcmp("IoProxXSF", string) == 0) {
+        *type = LfrfidKeyType::KeyIoProxXSF;
     } else {
         result = false;
     }
@@ -60,6 +67,9 @@ uint8_t lfrfid_key_get_type_data_count(LfrfidKeyType type) {
     case LfrfidKeyType::KeyI40134:
         return 3;
         break;
+    case LfrfidKeyType::KeyIoProxXSF:
+        return 4;
+        break;
     }
 
     return 0;
diff --git a/applications/lfrfid/helpers/key_info.h b/applications/lfrfid/helpers/key_info.h
index e465011d0..75a0a9406 100644
--- a/applications/lfrfid/helpers/key_info.h
+++ b/applications/lfrfid/helpers/key_info.h
@@ -8,6 +8,7 @@ enum class LfrfidKeyType : uint8_t {
     KeyEM4100,
     KeyH10301,
     KeyI40134,
+    KeyIoProxXSF,
 };
 
 const char* lfrfid_key_get_type_string(LfrfidKeyType type);
diff --git a/applications/lfrfid/helpers/protocols/protocol_ioprox.cpp b/applications/lfrfid/helpers/protocols/protocol_ioprox.cpp
new file mode 100644
index 000000000..b3b6a0e59
--- /dev/null
+++ b/applications/lfrfid/helpers/protocols/protocol_ioprox.cpp
@@ -0,0 +1,193 @@
+#include "protocol_ioprox.h"
+#include <furi.h>
+#include <cli/cli.h>
+
+/**
+ * Writes a bit into the output buffer.
+ */
+static void write_bit(bool bit, uint8_t position, uint8_t* data) {
+    if(bit) {
+        data[position / 8] |= 1UL << (7 - (position % 8));
+    } else {
+        data[position / 8] &= ~(1UL << (7 - (position % 8)));
+    }
+}
+
+/**
+ * Writes up to eight contiguous bits into the output buffer.
+ */
+static void write_bits(uint8_t byte, uint8_t position, uint8_t* data, uint8_t length) {
+    furi_check(length <= 8);
+    furi_check(length > 0);
+
+    for(uint8_t i = 0; i < length; ++i) {
+        uint8_t shift = 7 - i;
+        write_bit((byte >> shift) & 1, position + i, data);
+    }
+}
+
+uint8_t ProtocolIoProx::get_encoded_data_size() {
+    return 8;
+}
+
+uint8_t ProtocolIoProx::get_decoded_data_size() {
+    return 4;
+}
+
+void ProtocolIoProx::encode(
+    const uint8_t* decoded_data,
+    const uint8_t decoded_data_size,
+    uint8_t* encoded_data,
+    const uint8_t encoded_data_size) {
+    furi_check(decoded_data_size >= get_decoded_data_size());
+    furi_check(encoded_data_size >= get_encoded_data_size());
+
+    // Packet to transmit:
+    //
+    // 0           10          20          30          40          50          60
+    // v           v           v           v           v           v           v
+    // 01234567 8 90123456 7 89012345 6 78901234 5 67890123 4 56789012 3 45678901 23
+    // -----------------------------------------------------------------------------
+    // 00000000 0 11110000 1 facility 1 version_ 1 code-one 1 code-two 1 checksum 11
+
+    // Preamble.
+    write_bits(0b00000000, 0, encoded_data, 8);
+    write_bit(0, 8, encoded_data);
+
+    write_bits(0b11110000, 9, encoded_data, 8);
+    write_bit(1, 17, encoded_data);
+
+    // Facility code.
+    write_bits(decoded_data[0], 18, encoded_data, 8);
+    write_bit(1, 26, encoded_data);
+
+    // Version
+    write_bits(decoded_data[1], 27, encoded_data, 8);
+    write_bit(1, 35, encoded_data);
+
+    // Code one
+    write_bits(decoded_data[2], 36, encoded_data, 8);
+    write_bit(1, 44, encoded_data);
+
+    // Code two
+    write_bits(decoded_data[3], 45, encoded_data, 8);
+    write_bit(1, 53, encoded_data);
+
+    // Checksum
+    write_bits(compute_checksum(encoded_data, 8), 54, encoded_data, 8);
+    write_bit(1, 62, encoded_data);
+    write_bit(1, 63, encoded_data);
+}
+
+void ProtocolIoProx::decode(
+    const uint8_t* encoded_data,
+    const uint8_t encoded_data_size,
+    uint8_t* decoded_data,
+    const uint8_t decoded_data_size) {
+    furi_check(decoded_data_size >= get_decoded_data_size());
+    furi_check(encoded_data_size >= get_encoded_data_size());
+
+    // Packet structure:
+    // (Note: the second word seems fixed; but this may not be a guarantee;
+    //  it currently has no meaning.)
+    //
+    //0        1        2        3        4        5        6        7
+    //v        v        v        v        v        v        v        v
+    //01234567 89ABCDEF 01234567 89ABCDEF 01234567 89ABCDEF 01234567 89ABCDEF
+    //-----------------------------------------------------------------------
+    //00000000 01111000 01FFFFFF FF1VVVVV VVV1CCCC CCCC1CCC CCCCC1XX XXXXXX11
+    //
+    // F = facility code
+    // V = version
+    // C = code
+    // X = checksum
+
+    // Facility code
+    decoded_data[0] = (encoded_data[2] << 2) | (encoded_data[3] >> 6);
+
+    // Version code.
+    decoded_data[1] = (encoded_data[3] << 3) | (encoded_data[4] >> 5);
+
+    // Code bytes.
+    decoded_data[2] = (encoded_data[4] << 4) | (encoded_data[5] >> 4);
+    decoded_data[3] = (encoded_data[5] << 5) | (encoded_data[6] >> 3);
+}
+
+bool ProtocolIoProx::can_be_decoded(const uint8_t* encoded_data, const uint8_t encoded_data_size) {
+    furi_check(encoded_data_size >= get_encoded_data_size());
+
+    // Packet framing
+    //
+    //0        1        2        3        4        5        6        7
+    //v        v        v        v        v        v        v        v
+    //01234567 89ABCDEF 01234567 89ABCDEF 01234567 89ABCDEF 01234567 89ABCDEF
+    //-----------------------------------------------------------------------
+    //00000000 01______ _1______ __1_____ ___1____ ____1___ _____1XX XXXXXX11
+    //
+    // _ = variable data
+    // 0 = preamble 0
+    // 1 = framing 1
+    // X = checksum
+
+    // Validate the packet preamble is there...
+    if(encoded_data[0] != 0b00000000) {
+        return false;
+    }
+    if((encoded_data[1] >> 6) != 0b01) {
+        return false;
+    }
+
+    // ... check for known ones...
+    if((encoded_data[2] & 0b01000000) == 0) {
+        return false;
+    }
+    if((encoded_data[3] & 0b00100000) == 0) {
+        return false;
+    }
+    if((encoded_data[4] & 0b00010000) == 0) {
+        return false;
+    }
+    if((encoded_data[5] & 0b00001000) == 0) {
+        return false;
+    }
+    if((encoded_data[6] & 0b00000100) == 0) {
+        return false;
+    }
+    if((encoded_data[7] & 0b00000011) == 0) {
+        return false;
+    }
+
+    // ... and validate our checksums.
+    uint8_t checksum = compute_checksum(encoded_data, 8);
+    uint8_t checkval = (encoded_data[6] << 6) | (encoded_data[7] >> 2);
+
+    if(checksum != checkval) {
+        return false;
+    }
+
+    return true;
+}
+
+uint8_t ProtocolIoProx::compute_checksum(const uint8_t* data, const uint8_t data_size) {
+    furi_check(data_size == get_encoded_data_size());
+
+    // Packet structure:
+    //
+    //0        1        2         3         4         5         6         7
+    //v        v        v         v         v         v         v         v
+    //01234567 8 9ABCDEF0 1 23456789 A BCDEF012 3 456789AB C DEF01234 5 6789ABCD EF
+    //00000000 0 VVVVVVVV 1 WWWWWWWW 1 XXXXXXXX 1 YYYYYYYY 1 ZZZZZZZZ 1 CHECKSUM 11
+    //
+    // algorithm as observed by the proxmark3 folks
+    // CHECKSUM == 0xFF - (V + W + X + Y + Z)
+
+    uint8_t checksum = 0;
+
+    checksum += (data[1] << 1) | (data[2] >> 7); // VVVVVVVVV
+    checksum += (data[2] << 2) | (data[3] >> 6); // WWWWWWWWW
+    checksum += (data[3] << 3) | (data[4] >> 5); // XXXXXXXXX
+    checksum += (data[4] << 4) | (data[5] >> 4); // YYYYYYYYY
+    checksum += (data[5] << 5) | (data[6] >> 3); // ZZZZZZZZZ
+
+    return 0xFF - checksum;
+}
diff --git a/applications/lfrfid/helpers/protocols/protocol_ioprox.h b/applications/lfrfid/helpers/protocols/protocol_ioprox.h
new file mode 100644
index 000000000..2fff53b17
--- /dev/null
+++ b/applications/lfrfid/helpers/protocols/protocol_ioprox.h
@@ -0,0 +1,26 @@
+#pragma once
+#include "protocol_generic.h"
+
+class ProtocolIoProx : public ProtocolGeneric {
+public:
+    uint8_t get_encoded_data_size() final;
+    uint8_t get_decoded_data_size() final;
+
+    void encode(
+        const uint8_t* decoded_data,
+        const uint8_t decoded_data_size,
+        uint8_t* encoded_data,
+        const uint8_t encoded_data_size) final;
+
+    void decode(
+        const uint8_t* encoded_data,
+        const uint8_t encoded_data_size,
+        uint8_t* decoded_data,
+        const uint8_t decoded_data_size) final;
+
+    bool can_be_decoded(const uint8_t* encoded_data, const uint8_t encoded_data_size) final;
+
+private:
+    /**  Computes the IoProx checksum of the provided (decoded) data. */
+    uint8_t compute_checksum(const uint8_t* data, const uint8_t data_size);
+};
diff --git a/applications/lfrfid/helpers/rfid_reader.cpp b/applications/lfrfid/helpers/rfid_reader.cpp
index 1a6ed5f70..fb837cb7a 100644
--- a/applications/lfrfid/helpers/rfid_reader.cpp
+++ b/applications/lfrfid/helpers/rfid_reader.cpp
@@ -25,10 +25,12 @@ void RfidReader::decode(bool polarity) {
     case Type::Normal:
         decoder_em.process_front(polarity, period);
         decoder_hid26.process_front(polarity, period);
+        decoder_ioprox.process_front(polarity, period);
         break;
     case Type::Indala:
         decoder_em.process_front(polarity, period);
         decoder_hid26.process_front(polarity, period);
+        decoder_ioprox.process_front(polarity, period);
         decoder_indala.process_front(polarity, period);
         break;
     }
@@ -110,6 +112,11 @@ bool RfidReader::read(LfrfidKeyType* _type, uint8_t* data, uint8_t data_size, bo
         something_read = true;
     }
 
+    if(decoder_ioprox.read(data, data_size)) {
+        *_type = LfrfidKeyType::KeyIoProxXSF;
+        something_read = true;
+    }
+
     if(decoder_indala.read(data, data_size)) {
         *_type = LfrfidKeyType::KeyI40134;
         something_read = true;
diff --git a/applications/lfrfid/helpers/rfid_reader.h b/applications/lfrfid/helpers/rfid_reader.h
index b3a93b89c..903bbecf9 100644
--- a/applications/lfrfid/helpers/rfid_reader.h
+++ b/applications/lfrfid/helpers/rfid_reader.h
@@ -4,6 +4,7 @@
 #include "decoder_emmarin.h"
 #include "decoder_hid26.h"
 #include "decoder_indala.h"
+#include "decoder_ioprox.h"
 #include "key_info.h"
 
 //#define RFID_GPIO_DEBUG 1
@@ -34,6 +35,7 @@ private:
     DecoderEMMarin decoder_em;
     DecoderHID26 decoder_hid26;
     DecoderIndala decoder_indala;
+    DecoderIoProx decoder_ioprox;
 
     uint32_t last_dwt_value;
 
diff --git a/applications/lfrfid/helpers/rfid_timer_emulator.h b/applications/lfrfid/helpers/rfid_timer_emulator.h
index 874a4c3dd..2129a1c7f 100644
--- a/applications/lfrfid/helpers/rfid_timer_emulator.h
+++ b/applications/lfrfid/helpers/rfid_timer_emulator.h
@@ -5,6 +5,7 @@
 #include "encoder_emmarin.h"
 #include "encoder_hid_h10301.h"
 #include "encoder_indala_40134.h"
+#include "encoder_ioprox.h"
 #include "pulse_joiner.h"
 #include <map>
 
@@ -22,6 +23,7 @@ private:
         {LfrfidKeyType::KeyEM4100, new EncoderEM()},
         {LfrfidKeyType::KeyH10301, new EncoderHID_H10301()},
         {LfrfidKeyType::KeyI40134, new EncoderIndala_40134()},
+        {LfrfidKeyType::KeyIoProxXSF, new EncoderIoProx()},
     };
 
     PulseJoiner pulse_joiner;
diff --git a/applications/lfrfid/helpers/rfid_worker.cpp b/applications/lfrfid/helpers/rfid_worker.cpp
index 6e023cfbd..af15a340f 100644
--- a/applications/lfrfid/helpers/rfid_worker.cpp
+++ b/applications/lfrfid/helpers/rfid_worker.cpp
@@ -84,6 +84,11 @@ void RfidWorker::sq_write() {
             writer.write_indala(key.get_data());
             writer.stop();
             break;
+        case LfrfidKeyType::KeyIoProxXSF:
+            writer.start();
+            writer.write_ioprox(key.get_data());
+            writer.stop();
+            break;
         }
     }
 }
@@ -92,6 +97,7 @@ void RfidWorker::sq_write_start_validate() {
     switch(key.get_type()) {
     case LfrfidKeyType::KeyEM4100:
     case LfrfidKeyType::KeyH10301:
+    case LfrfidKeyType::KeyIoProxXSF:
         reader.start_forced(RfidReader::Type::Normal);
         break;
     case LfrfidKeyType::KeyI40134:
diff --git a/applications/lfrfid/helpers/rfid_writer.cpp b/applications/lfrfid/helpers/rfid_writer.cpp
index 996cb36ae..e85ab9361 100644
--- a/applications/lfrfid/helpers/rfid_writer.cpp
+++ b/applications/lfrfid/helpers/rfid_writer.cpp
@@ -1,4 +1,5 @@
 #include "rfid_writer.h"
+#include "protocols/protocol_ioprox.h"
 #include <furi_hal.h>
 #include "protocols/protocol_emmarin.h"
 #include "protocols/protocol_hid_h10301.h"
@@ -143,6 +144,28 @@ void RfidWriter::write_hid(const uint8_t hid_data[3]) {
     FURI_CRITICAL_EXIT();
 }
 
+/** Endian fixup. Translates an ioprox block into a t5577 block */
+static uint32_t ioprox_encode_block(const uint8_t block_data[4]) {
+    uint8_t raw_card_data[] = {block_data[3], block_data[2], block_data[1], block_data[0]};
+    return *reinterpret_cast<uint32_t*>(&raw_card_data);
+}
+
+void RfidWriter::write_ioprox(const uint8_t ioprox_data[4]) {
+    ProtocolIoProx ioprox_card;
+
+    uint8_t encoded_data[8];
+    ioprox_card.encode(ioprox_data, 4, encoded_data, sizeof(encoded_data));
+
+    const uint32_t ioprox_config_block_data = 0b00000000000101000111000001000000;
+
+    FURI_CRITICAL_ENTER();
+    write_block(0, 0, false, ioprox_config_block_data);
+    write_block(0, 1, false, ioprox_encode_block(&encoded_data[0]));
+    write_block(0, 2, false, ioprox_encode_block(&encoded_data[4]));
+    write_reset();
+    FURI_CRITICAL_EXIT();
+}
+
 void RfidWriter::write_indala(const uint8_t indala_data[3]) {
     ProtocolIndala40134 indala_card;
     uint32_t card_data[2];
diff --git a/applications/lfrfid/helpers/rfid_writer.h b/applications/lfrfid/helpers/rfid_writer.h
index 38329877b..98d2bf955 100644
--- a/applications/lfrfid/helpers/rfid_writer.h
+++ b/applications/lfrfid/helpers/rfid_writer.h
@@ -9,6 +9,7 @@ public:
     void stop();
     void write_em(const uint8_t em_data[5]);
     void write_hid(const uint8_t hid_data[3]);
+    void write_ioprox(const uint8_t ioprox_data[4]);
     void write_indala(const uint8_t indala_data[3]);
 
 private:
diff --git a/applications/lfrfid/lfrfid_cli.cpp b/applications/lfrfid/lfrfid_cli.cpp
index dbd37ddc8..451f10cef 100644
--- a/applications/lfrfid/lfrfid_cli.cpp
+++ b/applications/lfrfid/lfrfid_cli.cpp
@@ -28,6 +28,7 @@ void lfrfid_cli_print_usage() {
     printf("\tEM4100, EM-Marin (5 bytes key_data)\r\n");
     printf("\tH10301, HID26 (3 bytes key_data)\r\n");
     printf("\tI40134, Indala (3 bytes key_data)\r\n");
+    printf("\tIoProxXSF, IoProx (4 bytes key_data)\r\n");
     printf("\t<key_data> are hex-formatted\r\n");
 };
 
@@ -43,6 +44,9 @@ static bool lfrfid_cli_get_key_type(string_t data, LfrfidKeyType* type) {
     } else if(string_cmp_str(data, "I40134") == 0 || string_cmp_str(data, "Indala") == 0) {
         result = true;
         *type = LfrfidKeyType::KeyI40134;
+    } else if(string_cmp_str(data, "IoProxXSF") == 0 || string_cmp_str(data, "IoProx") == 0) {
+        result = true;
+        *type = LfrfidKeyType::KeyIoProxXSF;
     }
 
     return result;
diff --git a/applications/lfrfid/scene/lfrfid_app_scene_delete_confirm.cpp b/applications/lfrfid/scene/lfrfid_app_scene_delete_confirm.cpp
index 40bd9e360..236ca8c29 100644
--- a/applications/lfrfid/scene/lfrfid_app_scene_delete_confirm.cpp
+++ b/applications/lfrfid/scene/lfrfid_app_scene_delete_confirm.cpp
@@ -50,6 +50,14 @@ void LfRfidAppSceneDeleteConfirm::on_enter(LfRfidApp* app, bool /* need_restore
         string_printf(
             string_decrypted, "FC: %u    ID: %u", data[0], (uint16_t)((data[1] << 8) | (data[2])));
         break;
+    case LfrfidKeyType::KeyIoProxXSF:
+        string_printf(
+            string_decrypted,
+            "FC: %u   VC: %u   ID: %u",
+            data[0],
+            data[1],
+            (uint16_t)((data[2] << 8) | (data[3])));
+        break;
     }
     line_3->set_text(
         string_get_cstr(string_decrypted), 64, 39, 0, AlignCenter, AlignBottom, FontSecondary);
diff --git a/applications/lfrfid/scene/lfrfid_app_scene_read_success.cpp b/applications/lfrfid/scene/lfrfid_app_scene_read_success.cpp
index 2b81a58a0..fd6f46a09 100644
--- a/applications/lfrfid/scene/lfrfid_app_scene_read_success.cpp
+++ b/applications/lfrfid/scene/lfrfid_app_scene_read_success.cpp
@@ -7,6 +7,7 @@ void LfRfidAppSceneReadSuccess::on_enter(LfRfidApp* app, bool /* need_restore */
     string_init(string[0]);
     string_init(string[1]);
     string_init(string[2]);
+    string_init(string[3]);
 
     auto container = app->view_controller.get<ContainerVM>();
 
@@ -25,11 +26,13 @@ void LfRfidAppSceneReadSuccess::on_enter(LfRfidApp* app, bool /* need_restore */
     header->set_text(app->worker.key.get_type_text(), 89, 3, 0, AlignCenter);
 
     auto line_1_text = container->add<StringElement>();
-    auto line_2_text = container->add<StringElement>();
+    auto line_2l_text = container->add<StringElement>();
+    auto line_2r_text = container->add<StringElement>();
     auto line_3_text = container->add<StringElement>();
 
     auto line_1_value = container->add<StringElement>();
-    auto line_2_value = container->add<StringElement>();
+    auto line_2l_value = container->add<StringElement>();
+    auto line_2r_value = container->add<StringElement>();
     auto line_3_value = container->add<StringElement>();
 
     const uint8_t* data = app->worker.key.get_data();
@@ -37,7 +40,7 @@ void LfRfidAppSceneReadSuccess::on_enter(LfRfidApp* app, bool /* need_restore */
     switch(app->worker.key.get_type()) {
     case LfrfidKeyType::KeyEM4100:
         line_1_text->set_text("HEX:", 65, 23, 0, AlignRight, AlignBottom, FontSecondary);
-        line_2_text->set_text("Mod:", 65, 35, 0, AlignRight, AlignBottom, FontSecondary);
+        line_2l_text->set_text("Mod:", 65, 35, 0, AlignRight, AlignBottom, FontSecondary);
         line_3_text->set_text("ID:", 65, 47, 0, AlignRight, AlignBottom, FontSecondary);
 
         for(uint8_t i = 0; i < app->worker.key.get_type_data_count(); i++) {
@@ -49,7 +52,7 @@ void LfRfidAppSceneReadSuccess::on_enter(LfRfidApp* app, bool /* need_restore */
 
         line_1_value->set_text(
             string_get_cstr(string[0]), 68, 23, 0, AlignLeft, AlignBottom, FontSecondary);
-        line_2_value->set_text(
+        line_2l_value->set_text(
             string_get_cstr(string[1]), 68, 35, 0, AlignLeft, AlignBottom, FontSecondary);
         line_3_value->set_text(
             string_get_cstr(string[2]), 68, 47, 0, AlignLeft, AlignBottom, FontSecondary);
@@ -57,7 +60,7 @@ void LfRfidAppSceneReadSuccess::on_enter(LfRfidApp* app, bool /* need_restore */
     case LfrfidKeyType::KeyH10301:
     case LfrfidKeyType::KeyI40134:
         line_1_text->set_text("HEX:", 65, 23, 0, AlignRight, AlignBottom, FontSecondary);
-        line_2_text->set_text("FC:", 65, 35, 0, AlignRight, AlignBottom, FontSecondary);
+        line_2l_text->set_text("FC:", 65, 35, 0, AlignRight, AlignBottom, FontSecondary);
         line_3_text->set_text("Card:", 65, 47, 0, AlignRight, AlignBottom, FontSecondary);
 
         for(uint8_t i = 0; i < app->worker.key.get_type_data_count(); i++) {
@@ -69,11 +72,36 @@ void LfRfidAppSceneReadSuccess::on_enter(LfRfidApp* app, bool /* need_restore */
 
         line_1_value->set_text(
             string_get_cstr(string[0]), 68, 23, 0, AlignLeft, AlignBottom, FontSecondary);
-        line_2_value->set_text(
+        line_2l_value->set_text(
             string_get_cstr(string[1]), 68, 35, 0, AlignLeft, AlignBottom, FontSecondary);
         line_3_value->set_text(
             string_get_cstr(string[2]), 68, 47, 0, AlignLeft, AlignBottom, FontSecondary);
         break;
+
+    case LfrfidKeyType::KeyIoProxXSF:
+        line_1_text->set_text("HEX:", 65, 23, 0, AlignRight, AlignBottom, FontSecondary);
+        line_2l_text->set_text("FC:", 65, 35, 0, AlignRight, AlignBottom, FontSecondary);
+        line_2r_text->set_text("V:", 95, 35, 0, AlignRight, AlignBottom, FontSecondary);
+        line_3_text->set_text("Card:", 65, 47, 0, AlignRight, AlignBottom, FontSecondary);
+
+        for(uint8_t i = 0; i < app->worker.key.get_type_data_count(); i++) {
+            string_cat_printf(string[0], "%02X", data[i]);
+        }
+
+        string_printf(string[1], "%u", data[0]);
+        string_printf(string[2], "%u", (uint16_t)((data[2] << 8) | (data[3])));
+        string_printf(string[3], "%u", data[1]);
+
+        line_1_value->set_text(
+            string_get_cstr(string[0]), 68, 23, 0, AlignLeft, AlignBottom, FontSecondary);
+        line_2l_value->set_text(
+            string_get_cstr(string[1]), 68, 35, 0, AlignLeft, AlignBottom, FontSecondary);
+        line_2r_value->set_text(
+            string_get_cstr(string[3]), 98, 35, 0, AlignLeft, AlignBottom, FontSecondary);
+        line_3_value->set_text(
+            string_get_cstr(string[2]), 68, 47, 0, AlignLeft, AlignBottom, FontSecondary);
+
+        break;
     }
 
     app->view_controller.switch_to<ContainerVM>();
diff --git a/applications/lfrfid/scene/lfrfid_app_scene_save_type.h b/applications/lfrfid/scene/lfrfid_app_scene_save_type.h
index 1f6f6d742..847c0dabb 100644
--- a/applications/lfrfid/scene/lfrfid_app_scene_save_type.h
+++ b/applications/lfrfid/scene/lfrfid_app_scene_save_type.h
@@ -10,6 +10,6 @@ public:
 private:
     static void submenu_callback(void* context, uint32_t index);
     uint32_t submenu_item_selected = 0;
-    static const uint8_t keys_count = static_cast<uint8_t>(LfrfidKeyType::KeyI40134);
+    static const uint8_t keys_count = static_cast<uint8_t>(LfrfidKeyType::KeyIoProxXSF);
     string_t submenu_name[keys_count + 1];
 };
diff --git a/applications/lfrfid/scene/lfrfid_app_scene_saved_info.cpp b/applications/lfrfid/scene/lfrfid_app_scene_saved_info.cpp
index 73c9a403e..dd4a3d4eb 100644
--- a/applications/lfrfid/scene/lfrfid_app_scene_saved_info.cpp
+++ b/applications/lfrfid/scene/lfrfid_app_scene_saved_info.cpp
@@ -43,6 +43,14 @@ void LfRfidAppSceneSavedInfo::on_enter(LfRfidApp* app, bool /* need_restore */)
         string_printf(
             string_decrypted, "FC: %u    ID: %u", data[0], (uint16_t)((data[1] << 8) | (data[2])));
         break;
+    case LfrfidKeyType::KeyIoProxXSF:
+        string_printf(
+            string_decrypted,
+            "FC: %u   VC: %u   ID: %u",
+            data[0],
+            data[1],
+            (uint16_t)((data[2] << 8) | (data[3])));
+        break;
     }
     line_3->set_text(
         string_get_cstr(string_decrypted), 64, 39, 0, AlignCenter, AlignBottom, FontSecondary);