diff --git a/scripts/broadcast-ataoe-discover.nse b/scripts/broadcast-ataoe-discover.nse
index 5a4644826..d3a62851f 100644
--- a/scripts/broadcast-ataoe-discover.nse
+++ b/scripts/broadcast-ataoe-discover.nse
@@ -1,8 +1,8 @@
-local bin = require "bin"
 local math = require "math"
 local nmap = require "nmap"
 local packet = require "packet"
 local stdnse = require "stdnse"
+local string = require "string"
 local table = require "table"
 
 description = [[
@@ -63,9 +63,9 @@ ATAoE = {
       local header = ATAoE.Header:new()
       local pos, verflags
 
-      pos, verflags, header.error,
+      verflags, header.error,
         header.major, header.minor,
-        header.cmd, header.tag = bin.unpack(">CCSCCI", data)
+        header.cmd, header.tag, pos = string.unpack(">BBI2BBI4", data)
       header.version = verflags >> 4
       header.flags = verflags & 0x0F
       return header
@@ -75,7 +75,7 @@ ATAoE = {
     __tostring = function(self)
       assert(self.tag, "No tag was specified in Config Info Request")
       local verflags = self.version << 4
-      return bin.pack(">CCSCCI", verflags, self.error, self.major, self.minor, self.cmd, self.tag)
+      return string.pack(">BBI2BBI4", verflags, self.error, self.major, self.minor, self.cmd, self.tag)
     end,
   },
 
@@ -106,7 +106,7 @@ local function sendConfigInfoRequest(iface)
   local p = packet.Frame:new()
   p.mac_src = iface.mac
   p.mac_dst = packet.mactobin(ETHER_BROADCAST)
-  p.ether_type = bin.pack(">S", P_ATAOE)
+  p.ether_type = string.pack(">I2", P_ATAOE)
   p.buf = tostring(req)
   p:build_ether_frame()
 
diff --git a/scripts/broadcast-ping.nse b/scripts/broadcast-ping.nse
index 5604f5033..4c8f89462 100644
--- a/scripts/broadcast-ping.nse
+++ b/scripts/broadcast-ping.nse
@@ -1,10 +1,10 @@
-local bin = require "bin"
 local coroutine = require "coroutine"
 local ipOps = require "ipOps"
 local nmap = require "nmap"
 local packet = require "packet"
 local stdnse = require "stdnse"
 local tab = require "tab"
+local string = require "string"
 local table = require "table"
 local target = require "target"
 
@@ -102,22 +102,24 @@ local icmp_packet = function(srcIP, dstIP, ttl, data_length, mtu, seqNo, icmp_id
   end
 
   -- Type=08; Code=00; Chksum=0000; ID=icmp_id; SeqNo=icmp_seqNo; Payload=icmp_payload(hex string);
-  local icmp_msg = bin.pack(">CCSASA", 8, 0, 0, icmp_id, seqNo, icmp_payload)
+  local icmp_msg = string.pack(">BBI2", 8, 0, 0) .. icmp_id .. string.pack("I2", seqNo) .. icmp_payload
 
   local icmp_checksum = packet.in_cksum(icmp_msg)
 
-  icmp_msg = bin.pack(">CCSASA", 8, 0, icmp_checksum, icmp_id, seqNo, icmp_payload)
+  icmp_msg = string.pack(">BBI2", 8, 0, icmp_checksum) .. icmp_id .. string.pack("I2", seqNo) .. icmp_payload
 
 
   --IP header
-  local ip_bin = bin.pack(">ASSACCx10", -- x10 = checksum & addresses
-    "\x45\x00", -- IPv4, no options, no DSCN, no ECN
+  local ip_bin = "\x45\x00", -- IPv4, no options, no DSCN, no ECN
+    string.pack(">I2I2",
     20 + #icmp_msg, -- total length
-    0, -- IP ID
-    "\x40\x00", -- DF
+    0) -- IP ID
+    .. "\x40\x00" -- DF
+    .. string.pack("CC",
     ttl,
     1 -- ICMP
     )
+    .. ("\0"):rep(10) -- checksum & addresses
 
   -- IP+ICMP; Addresses and checksum need to be filled
   local icmp_bin = ip_bin .. icmp_msg
diff --git a/scripts/krb5-enum-users.nse b/scripts/krb5-enum-users.nse
index 084c6b8c6..05668eb7e 100644
--- a/scripts/krb5-enum-users.nse
+++ b/scripts/krb5-enum-users.nse
@@ -1,5 +1,4 @@
 local asn1 = require "asn1"
-local bin = require "bin"
 local coroutine = require "coroutine"
 local nmap = require "nmap"
 local os = require "os"
@@ -140,9 +139,9 @@ KRB5 = {
       local len = asn1.ASN1Encoder.encodeLength(#val[1])
 
       if ( val._type and types[val._type] ) then
-        return bin.pack("CAA", types[val._type], len, val[1])
+        return string.pack("B", types[val._type]) .. len .. val[1]
       elseif ( val._type and 'number' == type(val._type) ) then
-        return bin.pack("CAA", val._type, len, val[1])
+        return string.pack("B", val._type) .. len .. val[1]
       end
 
     end,
@@ -227,7 +226,7 @@ KRB5 = {
 
     -- forwardable
     local kdc_options = 0x40000000
-    data = bin.pack(">I", kdc_options) .. data
+    data = string.pack(">I4", kdc_options) .. data
 
     -- add padding
     data = '\0' .. data
@@ -245,7 +244,7 @@ KRB5 = {
     data = self:encodeSequence(encoder, 0x6a, data)
 
     if ( protocol == "tcp" ) then
-      data = bin.pack(">I", #data) .. data
+      data = string.pack(">s4", data)
     end
 
     return data
diff --git a/scripts/metasploit-msgrpc-brute.nse b/scripts/metasploit-msgrpc-brute.nse
index ff780dba9..555d439a4 100644
--- a/scripts/metasploit-msgrpc-brute.nse
+++ b/scripts/metasploit-msgrpc-brute.nse
@@ -3,7 +3,6 @@ local shortport = require "shortport"
 local stdnse = require "stdnse"
 local string = require "string"
 local http = require "http"
-local bin = require "bin"
 local creds = require "creds"
 
 description = [[
@@ -38,25 +37,19 @@ categories = {"intrusive", "brute"}
 portrule = shortport.port_or_service(55553,"metasploit-msgrpc")
 
 
+-- returns a "prefix" that msgpack uses for strings
+local get_prefix = function(data)
+  if #data <= 31 then
+    return string.pack("B", 0xa0 + #data)
+  else
+    return "\xda"  .. string.pack(">I2", #data)
+  end
+end
+
 -- simple function that implements basic msgpack encoding we need for this script
 -- see http://wiki.msgpack.org/display/MSGPACK/Format+specification for more
 local encode = function(username, password)
-  local method = "auth.login"
-  local username_prefix
-  local password_prefix
-
-  if string.len(username) <= 31 then -- http://wiki.msgpack.org/display/MSGPACK/Format+specification#Formatspecification-fixraw
-    username_prefix = bin.pack("C",0xa0 + string.len(username))
-  else -- http://wiki.msgpack.org/display/MSGPACK/Format+specification#Formatspecification-raw16
-    username_prefix = "\xda"  .. bin.pack(">s",string.len(username))
-  end
-  if string.len(password) <= 31 then
-    password_prefix = bin.pack("C",0xa0 + string.len(password))
-  else
-    password_prefix = "\xda"  .. bin.pack(">s",string.len(password))
-  end
-
-  return "\x93\xaa" .. method .. username_prefix .. username .. password_prefix .. password
+  return "\x93\xaaauth.login" .. get_prefix(username) .. username .. get_prefix(password) .. password
 end
 
 Driver = {
diff --git a/scripts/mikrotik-routeros-brute.nse b/scripts/mikrotik-routeros-brute.nse
index a87f7d939..6a13f4f84 100644
--- a/scripts/mikrotik-routeros-brute.nse
+++ b/scripts/mikrotik-routeros-brute.nse
@@ -27,7 +27,6 @@ license = "Same as Nmap--See https://nmap.org/book/man-legal.html"
 categories = {"intrusive", "brute"}
 
 local shortport = require "shortport"
-local bin = require "bin"
 local brute = require "brute"
 local creds = require "creds"
 local nmap = require "nmap"
@@ -55,7 +54,7 @@ Driver =
 
   login = function( self, username, password )
    local status, data, try
-    data = bin.pack("cAx", 0x6,"/login")
+    data = string.pack("s1x", "/login")
 
     --Connect to service and obtain the challenge response
     try = nmap.new_try(function() return false end)
@@ -67,10 +66,9 @@ Driver =
     --If we find the challenge value we continue the connection process
     if ret then
         stdnse.debug1("Challenge value found:%s", ret)
-        local md5str = bin.pack("xAA", password, stdnse.fromhex( ret)) --appends pwd and challenge
+        local md5str = "\0" .. password .. stdnse.fromhex(ret) --appends pwd and challenge
         local chksum = stdnse.tohex(openssl.md5(md5str))
-        local user_l = username:len()+6 --we add six because of the string "=name="
-        local login_pkt = bin.pack("cAcAcAx", 0x6, "/login", user_l, "=name="..username, 0x2c, "=response=00"..chksum)
+        local login_pkt = string.pack("s1s1s1x", "/login", "=name="..username, "=response=00"..chksum)
         try(self.s:send(login_pkt))
         data = try(self.s:receive_bytes(50))
         stdnse.debug1("Response #2:%s", data)
diff --git a/scripts/modbus-discover.nse b/scripts/modbus-discover.nse
index 66d5b508f..ef31947b0 100644
--- a/scripts/modbus-discover.nse
+++ b/scripts/modbus-discover.nse
@@ -1,4 +1,3 @@
-local bin = require "bin"
 local comm = require "comm"
 local nmap = require "nmap"
 local shortport = require "shortport"
@@ -60,11 +59,11 @@ local form_rsid = function(sid, functionId, data)
   if  ( #data > 0 ) then
     payload_len = payload_len + #data
   end
-  return "\0\0\0\0\0" .. bin.pack('CCC', payload_len, sid, functionId) .. data
+  return "\0\0\0\0\0" .. string.pack('BBB', payload_len, sid, functionId) .. data
 end
 
 discover_device_id_recursive = function(host, port, sid, start_id, objects_table)
-  local rsid = form_rsid(sid, 0x2B, "\x0E\x01" .. bin.pack('C', start_id))
+  local rsid = form_rsid(sid, 0x2B, "\x0E\x01" .. string.pack('B', start_id))
   local status, result = comm.exchange(host, port, rsid)
   if ( status and (#result >= 8)) then
     local ret_code = string.byte(result, 8)
@@ -100,8 +99,7 @@ end
 local extract_slave_id = function(response)
   local byte_count = string.byte(response, 9)
   if ( byte_count == nil or byte_count == 0) then return nil end
-  local offset, slave_id = bin.unpack("A"..byte_count, response, 10)
-  return slave_id
+  return string.unpack("c"..byte_count, response, 10)
 end
 
 modbus_exception_codes = {
diff --git a/scripts/oracle-sid-brute.nse b/scripts/oracle-sid-brute.nse
index a47a53ab3..d559b5475 100644
--- a/scripts/oracle-sid-brute.nse
+++ b/scripts/oracle-sid-brute.nse
@@ -1,4 +1,3 @@
-local bin = require "bin"
 local io = require "io"
 local nmap = require "nmap"
 local shortport = require "shortport"
@@ -56,7 +55,7 @@ local tns_type = {CONNECT=1, REFUSE=4, REDIRECT=5, RESEND=11}
 --
 local function create_tns_header(packetType, packetLength)
 
-  local request = bin.pack( ">SSCCS",
+  local request = string.pack( ">I2 I2 BB I2",
     packetLength + 34, -- Packet Length
     0, -- Packet Checksum
     tns_type[packetType], -- Packet Type
@@ -82,7 +81,7 @@ local function create_connect_packet( host_ip, port_no, sid )
     "(DESCRIPTION=(CONNECT_DATA=(SID=%s)(CID=(PROGRAM=)(HOST=__jdbc__)(USER=)))\z
     (ADDRESS=(PROTOCOL=tcp)(HOST=%s)(PORT=%d)))", sid, host_ip, port_no)
 
-  local data = bin.pack(">SSSSSSSSSSICCA",
+  local data = string.pack(">I2 I2 I2 I2 I2 I2 I2 I2 I2 I2 I4 BB",
     308, -- Version
     300, -- Version (Compatibility)
     0, -- Service Options
@@ -95,9 +94,9 @@ local function create_connect_packet( host_ip, port_no, sid )
     34, -- Offset to connect data
     0, -- Maximum Receivable Connect Data
     1, -- Connect Flags 0
-    1, -- Connect Flags 1
-    connect_data
+    1 -- Connect Flags 1
     )
+    .. connect_data
 
 
   local header = create_tns_header("CONNECT", connect_data:len() )
@@ -116,8 +115,7 @@ local function process_tns_packet( packet )
   local tnspacket = {}
 
   -- just pull out the bare minimum to be able to match
-  local _
-  _, tnspacket.Length, tnspacket.Checksum, tnspacket.Type = bin.unpack(">SSC", packet)
+  tnspacket.Length, tnspacket.Checksum, tnspacket.Type = string.unpack(">I2I2B", packet)
 
   return tnspacket
 
diff --git a/scripts/rdp-enum-encryption.nse b/scripts/rdp-enum-encryption.nse
index 453b6d3ed..158f0e6c7 100644
--- a/scripts/rdp-enum-encryption.nse
+++ b/scripts/rdp-enum-encryption.nse
@@ -29,12 +29,12 @@ author = "Patrik Karlsson"
 license = "Same as Nmap--See https://nmap.org/book/man-legal.html"
 
 
-local bin = require("bin")
 local nmap = require("nmap")
 local table = require("table")
 local shortport = require("shortport")
 local rdp = require("rdp")
 local stdnse = require("stdnse")
+local string = require "string"
 
 categories = {"safe", "discovery"}
 
@@ -71,11 +71,11 @@ local function enum_protocols(host, port)
       return false, response
     end
 
-    local pos, success = bin.unpack("C", response.itut.data)
+    local success = string.unpack("B", response.itut.data)
     if ( success == 2 ) then
       table.insert(res_proto, ("%s: SUCCESS"):format(k))
     elseif ( nmap.debugging() > 0 ) then
-      local pos, err = bin.unpack("C", response.itut.data, 5)
+      local err = string.unpack("B", response.itut.data, 5)
       if ( err > 0 ) then
         table.insert(res_proto, ("%s: FAILED (%s)"):format(k, ERRORS[err] or "Unknown"))
       else
@@ -133,8 +133,8 @@ local function enum_ciphers(host, port)
     local status, response = comm:exch(msc)
     comm:close()
     if ( status ) then
-      local pos, enc_level = bin.unpack("C", response.itut.data, 95 + 8)
-      local pos, enc_cipher= bin.unpack("C", response.itut.data, 95 + 4)
+      local enc_level = string.unpack("B", response.itut.data, 95 + 8)
+      local enc_cipher= string.unpack("B", response.itut.data, 95 + 4)
       if ( enc_cipher == v ) then
         table.insert(res_ciphers, ("%s: SUCCESS"):format(k))
       end
diff --git a/scripts/rdp-vuln-ms12-020.nse b/scripts/rdp-vuln-ms12-020.nse
index c154a79f5..362f9a040 100644
--- a/scripts/rdp-vuln-ms12-020.nse
+++ b/scripts/rdp-vuln-ms12-020.nse
@@ -1,7 +1,7 @@
-local bin = require "bin"
 local nmap = require "nmap"
 local shortport = require "shortport"
 local stdnse = require "stdnse"
+local string = require "string"
 local vulns = require "vulns"
 
 description = [[
@@ -192,13 +192,13 @@ action = function(host, port)
   status, err = socket:send(connectInitial)
   status, err = socket:send(userRequest)  -- send attach user request
   status, response = socket:receive_bytes(0) -- receive attach user confirm
-  pos,user1 = bin.unpack(">S",response:sub(10,11)) -- user_channel-1001 - see http://msdn.microsoft.com/en-us/library/cc240918%28v=prot.10%29.aspx
+  user1, pos = string.unpack(">I2", response, 10) -- user_channel-1001 - see http://msdn.microsoft.com/en-us/library/cc240918%28v=prot.10%29.aspx
 
   status, err = socket:send(userRequest) -- send another attach user request
   status, response = socket:receive_bytes(0) -- receive another attach user confirm
-  pos,user2 = bin.unpack(">S",response:sub(10,11)) -- second user's channel - 1001
+  user2, pos = string.unpack(">I2", response, 10) -- second user's channel - 1001
   user2 = user2+1001 -- second user's channel
-  local data4 = bin.pack(">SS",user1,user2)
+  local data4 = string.pack(">I2I2", user1, user2)
   local data5 = stdnse.fromhex("0300000c02f08038") -- channel join request TPDU
   local channelJoinRequest = data5 .. data4
   status, err = socket:send(channelJoinRequest) -- bogus channel join request user1 requests channel of user2
@@ -208,7 +208,7 @@ action = function(host, port)
     -- see http://msdn.microsoft.com/en-us/library/cc240911%28v=prot.10%29.aspx
     -- service is vulnerable
     -- send a valid request to prevent the BSoD
-    data4 = bin.pack(">SS",user2-1001,user2)
+    data4 = string.pack(">I2I2", user2 - 1001, user2)
     channelJoinRequest = data5 .. data4 -- valid join request
     status, err = socket:send(channelJoinRequest)
     status, response = socket:receive_bytes(0)
diff --git a/scripts/rpc-grind.nse b/scripts/rpc-grind.nse
index dfe990927..a89067b53 100644
--- a/scripts/rpc-grind.nse
+++ b/scripts/rpc-grind.nse
@@ -1,7 +1,7 @@
 local stdnse = require "stdnse"
+local string = require "string"
 local nmap = require "nmap"
 local rpc = require "rpc"
-local bin = require "bin"
 local math = require "math"
 local io = require "io"
 local coroutine = require "coroutine"
@@ -103,8 +103,7 @@ local isRPC = function(host, port)
       -- If we got response, set port to open
       nmap.set_port_state(host, port, "open")
 
-      _, rxid = bin.unpack(">I", data, 1)
-      _, msgtype = bin.unpack(">I", data, 5)
+      rxid, msgtype = string.unpack(">I4 I4", data)
       -- If response XID does match request XID
       -- and message type equals 1 (REPLY) then
       -- it is a RPC port.
@@ -209,8 +208,7 @@ local rpcGrinder = function(host, port, iterator, result)
       if response.accept_state == rpc.Portmap.AcceptState.PROG_MISMATCH then
         result.program = program
         result.number = number
-        _, result.highver = bin.unpack(">I", data, #data - 3)
-        _, result.lowver = bin.unpack(">I", data, #data - 7)
+        result.lowver, result.highver = string.unpack(">I4 I4", data, #data - 7)
         table.insert(result, true) -- To make #result > 1
 
         -- Otherwise, an Accept state other than Program unavailable is not normal behaviour.
diff --git a/scripts/telnet-encryption.nse b/scripts/telnet-encryption.nse
index d89a7f279..1de91c320 100644
--- a/scripts/telnet-encryption.nse
+++ b/scripts/telnet-encryption.nse
@@ -1,7 +1,7 @@
-local bin = require "bin"
 local nmap = require "nmap"
 local shortport = require "shortport"
 local stdnse = require "stdnse"
+local string = require "string"
 local table = require "table"
 
 description = [[
@@ -50,20 +50,20 @@ local function processOptions(data)
   local result = {}
   while ( pos < #data ) do
     local iac, cmd, option
-    pos, iac, cmd = bin.unpack("CC", data, pos)
+    iac, cmd, pos = string.unpack("BB", data, pos)
     if ( 0xFF ~= iac ) then
       break
     end
     if ( COMMAND.SubCommand == cmd ) then
       repeat
-        pos, iac = bin.unpack("C", data, pos)
+        iac, pos = string.unpack("B", data, pos)
       until( pos == #data or 0xFF == iac )
-      pos, cmd = bin.unpack("C", data, pos)
+      cmd, pos = string.unpack("B", data, pos)
       if ( not(cmd) == 0xF0 ) then
         return false, "Failed to parse options"
       end
     else
-      pos, option = bin.unpack("H", data, pos)
+      pos, option = string.unpack("B", data, pos)
       result[option] = result[option] or {}
       table.insert(result[option], cmd)
     end
@@ -95,9 +95,9 @@ action = function(host, port)
     if ( not(status) ) then
       return fail("Failed to process telnet options")
     end
-  until( result.done or result.cmds['26'] )
+  until( result.done or result.cmds[0x26] )
 
-  for _, cmd in ipairs(result.cmds['26'] or {}) do
+  for _, cmd in ipairs(result.cmds[0x26] or {}) do
     if ( COMMAND.Will == cmd or COMMAND.Do == cmd ) then
       return "\n  Telnet server supports encryption"
     end