diff --git a/DSView/res/DSLogicPlus-pgl12.bin b/DSView/res/DSLogicPlus-pgl12.bin
new file mode 100644
index 00000000..e3393062
Binary files /dev/null and b/DSView/res/DSLogicPlus-pgl12.bin differ
diff --git a/DSView/res/DSLogicU2Basic-pgl12.bin b/DSView/res/DSLogicU2Basic-pgl12.bin
new file mode 100644
index 00000000..e3393062
Binary files /dev/null and b/DSView/res/DSLogicU2Basic-pgl12.bin differ
diff --git a/libsigrok4DSL/hardware/DSL/command.h b/libsigrok4DSL/hardware/DSL/command.h
index 53eef7b6..f2b4b398 100644
--- a/libsigrok4DSL/hardware/DSL/command.h
+++ b/libsigrok4DSL/hardware/DSL/command.h
@@ -48,6 +48,8 @@
 #define bmWR_WORDWIDE      (1 << 0)
 
 #define VTH_ADDR 0x78
+#define SEC_DATA_ADDR 0x75
+#define SEC_CTRL_ADDR 0x73
 #define CTR1_ADDR 0x71
 #define CTR0_ADDR 0x70
 #define COMB_ADDR 0x68
@@ -55,6 +57,14 @@
 #define ADCC_ADDR 0x48
 #define HDL_VERSION_ADDR 0x04
 
+#define bmSECU_READY	(1 << 3)
+#define bmSECU_PASS		(1 << 4)
+#define SECU_STEPS		8
+#define SECU_START		0x0513
+#define SECU_CHECK		0x0219
+#define SECU_EEP_ADDR	0x3C00
+#define SECU_TRY_CNT	8
+
 #define EI2C_CTR_OFF   0x2
 #define EI2C_RXR_OFF   0x3
 #define EI2C_SR_OFF    0x4
diff --git a/libsigrok4DSL/hardware/DSL/dsl.c b/libsigrok4DSL/hardware/DSL/dsl.c
index a07a222b..5fb85f88 100644
--- a/libsigrok4DSL/hardware/DSL/dsl.c
+++ b/libsigrok4DSL/hardware/DSL/dsl.c
@@ -30,6 +30,13 @@
 #undef LOG_PREFIX
 #define LOG_PREFIX "dsl: "
 
+SR_PRIV int dsl_secuReset(const struct sr_dev_inst *sdi);
+SR_PRIV int dsl_secuWrite(const struct sr_dev_inst *sdi, uint16_t cmd, uint16_t din);
+SR_PRIV gboolean dsl_isSecuReady(const struct sr_dev_inst *sdi);
+SR_PRIV gboolean dsl_isSecuPass(const struct sr_dev_inst *sdi);
+SR_PRIV uint16_t dsl_secuRead(const struct sr_dev_inst *sdi);
+SR_PRIV int dsl_secuCheck(const struct sr_dev_inst *sdi, uint16_t* encryption, int steps);
+
 static const int32_t probeOptions[] = {
     SR_CONF_PROBE_COUPLING,
     SR_CONF_PROBE_VDIV,
@@ -1912,6 +1919,17 @@ SR_PRIV int dsl_dev_open(struct sr_dev_driver *di, struct sr_dev_inst *sdi, gboo
         }
     }
 
+     // check security
+    uint16_t encryption[SECU_STEPS];
+    ret = dsl_wr_reg(sdi, CTR0_ADDR, bmNONE); // dessert clear
+    if (dsl_rd_nvm(sdi, (unsigned char *)encryption, SECU_EEP_ADDR, SECU_STEPS*2) != SR_OK) {
+        sr_err("Read EEPROM content failed!");
+        return SR_ERR;
+    }
+    ret = dsl_secuCheck(sdi, encryption, SECU_STEPS);
+    if (ret != SR_OK)
+        sr_err("Security check failed!");
+
 
     return SR_OK;
 }
@@ -2520,3 +2538,104 @@ SR_PRIV int sr_option_value_to_code(int config_id, const char *value, const stru
 
     return -1;
 }
+
+
+/*
+ * security low level operations
+ */
+SR_PRIV int dsl_secuReset(const struct sr_dev_inst *sdi)
+{
+    if (dsl_wr_reg(sdi, SEC_CTRL_ADDR, 0) != SR_OK) goto Err;
+    if (dsl_wr_reg(sdi, SEC_CTRL_ADDR + 1, 0) != SR_OK) goto Err;
+    g_usleep(10*1000);
+    if (dsl_wr_reg(sdi, SEC_CTRL_ADDR, 1) != SR_OK) goto Err;
+    if (dsl_wr_reg(sdi, SEC_CTRL_ADDR + 1, 0) != SR_OK) goto Err;
+
+    return SR_OK;
+Err:
+    sr_err("Sent dsl_wr_reg(SEC_XXX_ADDR) command failed.");
+    return SR_ERR;
+}
+
+SR_PRIV int dsl_secuWrite(const struct sr_dev_inst *sdi, uint16_t cmd, uint16_t din)
+{
+    if (dsl_wr_reg(sdi, SEC_DATA_ADDR, din) != SR_OK) goto Err;
+    if (dsl_wr_reg(sdi, SEC_DATA_ADDR + 1, (din >> 8)) != SR_OK) goto Err;
+    if (dsl_wr_reg(sdi, SEC_CTRL_ADDR, cmd) != SR_OK) goto Err;
+    if (dsl_wr_reg(sdi, SEC_CTRL_ADDR + 1, (cmd >> 8)) != SR_OK) goto Err;
+
+    return SR_OK;
+Err:
+    sr_err("Sent dsl_wr_reg(SEC_XXX_ADDR) command failed.");
+    return SR_ERR;
+}
+
+SR_PRIV gboolean dsl_isSecuReady(const struct sr_dev_inst *sdi)
+{
+    uint8_t temp;
+    if (dsl_rd_reg(sdi, SEC_CTRL_ADDR, &temp) != SR_OK) goto Err;
+
+    if (temp & bmSECU_READY)
+        return TRUE;
+    else
+        return FALSE;
+Err:
+    sr_err("Sent dsl_rd_reg(SEC_XXX_ADDR) command failed.");
+    return FALSE;
+}
+
+SR_PRIV gboolean dsl_isSecuPass(const struct sr_dev_inst *sdi)
+{
+    uint8_t temp;
+    if (dsl_rd_reg(sdi, SEC_CTRL_ADDR, &temp) != SR_OK) goto Err;
+
+    if (temp & bmSECU_PASS)
+        return TRUE;
+    else
+        return FALSE;
+Err:
+    sr_err("Sent dsl_rd_reg(SEC_XXX_ADDR) command failed.");
+    return FALSE;
+}
+
+SR_PRIV uint16_t dsl_secuRead(const struct sr_dev_inst *sdi)
+{
+    uint16_t sec;
+    if (dsl_rd_reg(sdi, SEC_DATA_ADDR + 1, (uint8_t*)&sec) != SR_OK) goto Err;
+    sec <<= 8;
+    if (dsl_rd_reg(sdi, SEC_DATA_ADDR, (uint8_t*)&sec) != SR_OK) goto Err;
+
+    return sec;
+Err:
+    sr_err("Sent dsl_rd_reg(SEC_XXX_ADDR) command failed.");
+    return 0;
+}
+
+
+/*
+ * security API interface
+ */
+SR_PRIV int dsl_secuCheck(const struct sr_dev_inst *sdi, uint16_t* encryption, int steps)
+{
+    int tryCnt = SECU_TRY_CNT;
+
+    dsl_secuReset(sdi);
+    if (dsl_isSecuPass(sdi))
+        return SR_ERR;
+    dsl_secuWrite(sdi, SECU_START, 0);
+    while(steps--) {
+        if (dsl_isSecuPass(sdi))
+            return SR_ERR;
+        while(!dsl_isSecuReady(sdi)) {
+            if (tryCnt-- == 0) {
+                sr_err("Get security ready failed.");
+                return SR_ERR;
+            }
+        }
+        if (dsl_secuRead(sdi) != 0)
+            return SR_ERR;
+        dsl_secuWrite(sdi, SECU_CHECK, encryption[steps]);
+    }
+
+    return SR_OK;
+}
diff --git a/libsigrok4DSL/hardware/DSL/dsl.h b/libsigrok4DSL/hardware/DSL/dsl.h
index 9d816540..59f73a5f 100644
--- a/libsigrok4DSL/hardware/DSL/dsl.h
+++ b/libsigrok4DSL/hardware/DSL/dsl.h
@@ -73,6 +73,8 @@
 #define CAPS_FEATURE_LA_CH32 (1 << 11)
 // auto tunning vgain
 #define CAPS_FEATURE_AUTO_VGAIN (1 << 12)
+// max 2.5v fpga threshold
+#define CAPS_FEATURE_MAX25_VTH (1 << 13)
 /* end */
 
 
@@ -689,6 +691,60 @@ static const struct DSL_profile supported_DSLogic[] = {
       SR_GHZ(1)}
     },
 
+    {0x2A0E, 0x0030, LIBUSB_SPEED_HIGH, "DreamSourceLab", "DSLogic PLus", NULL,
+     "DSLogicPlus.fw",
+     "DSLogicPlus-pgl12.bin",
+     "DSLogicPlus-pgl12.bin",
+     {CAPS_MODE_LOGIC,
+      CAPS_FEATURE_VTH | CAPS_FEATURE_BUF | CAPS_FEATURE_MAX25_VTH,
+      (1 << DSL_STREAM20x16) | (1 << DSL_STREAM25x12) | (1 << DSL_STREAM50x6) | (1 << DSL_STREAM100x3) |
+      (1 << DSL_BUFFER100x16) | (1 << DSL_BUFFER200x8) | (1 << DSL_BUFFER400x4),
+      16,
+      SR_MB(256),
+      0,
+      DSL_BUFFER100x16,
+      0,
+      samplerates400,
+      0,
+      DSL_STREAM20x16,
+      SR_MHZ(1),
+      SR_Mn(1),
+      0,
+      0,
+      0,
+      0,
+      0,
+      SR_MHZ(200),
+      SR_MHZ(400)}
+    },
+
+    {0x2A0E, 0x0031, LIBUSB_SPEED_HIGH, "DreamSourceLab", "DSLogic U2Basic", NULL,
+     "DSLogicU2Basic.fw",
+     "DSLogicU2Basic-pgl12.bin",
+     "DSLogicU2Basic-pgl12.bin",
+     {CAPS_MODE_LOGIC,
+      CAPS_FEATURE_VTH | CAPS_FEATURE_BUF | CAPS_FEATURE_MAX25_VTH,
+      (1 << DSL_STREAM20x16) | (1 << DSL_STREAM25x12) | (1 << DSL_STREAM50x6) | (1 << DSL_STREAM100x3) |
+      (1 << DSL_BUFFER100x16),
+      16,
+      SR_MB(64),
+      0,
+      DSL_BUFFER100x16,
+      0,
+      samplerates100,
+      0,
+      DSL_STREAM20x16,
+      SR_MHZ(1),
+      SR_Mn(1),
+      0,
+      0,
+      0,
+      0,
+      0,
+      SR_MHZ(200),
+      SR_MHZ(400)}
+    },
+
     { 0, 0, LIBUSB_SPEED_UNKNOWN, 0, 0, 0, 0, 0, 0, {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}
 };