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Protection of Programs on PLC

Created by: e.memarian at: 12/16/2011 5:58 PM (11 Replies)

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12/16/2011 5:58 PM	Rate (0)
e.memarian Posts: 5 Rating: (0)	Hi, These days I'm doing a unique project in a substation. And I don't want to let anyone to get my Programs and configurations. Please show me ways of protecting my programs on PLC.
e.memarian Posts: 5 Rating: (0)
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12/16/2011 6:18 PM	Rate (0)
Marcjan Diamond Member Joined: 4/22/2010 Last visit: 3/31/2025 Posts: 5697 Rating: (716)	Hello, That's hard to tell if we don't know what PLC you have there, S7 200, 1200, 300, 400 ? They all have Password protection in levels variating from read and write, only read, up to no read and write. So let us know what PLC you use and we help. Regards, Marcjan
	Problem solved? Please let us know! Please no technical questions by PM, use the forum sections for your questions.
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12/16/2011 7:02 PM	Rate (0)
e.memarian Posts: 5 Rating: (0)	Excuse me Marcjan, I'm working on a s7-300 set. My CPU is 315-2DP.
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12/16/2011 7:35 PM

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hdhosseini

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e.memarian
Excuse me Marcjan,
I'm working on a s7-300 set. My CPU is 315-2DP.

Dear e.memarian ,

Check this:

How can you activate the protection level with a password in the HW Config for an S7 CPU?

Description
The table below shows the three different ways of protecting your S7 program against unauthorized access.

Type of access protection

Configuring access protection

Online protection against access to the CPU

The protection level and the input of a password for online access protection is entered in the CPU's object properties in the HW Config.

Encrypted block protection
(STEP 7 V5.5 onwards)

You must install the "S7 Block Privacy" program from the STEP 7 V5.5 DVD before you can configure encrypted block protection. Then you can configure block protection in the SIMATIC Manager by way of "Tools > Block protection...". More information is available in Entry ID: 45632073.
Note
Assigning a password.
The block protection can only be removed again by entering a password.

KNOW_HOW_PROTECT
(STEP 7 V4.0.2 onwards)

A source is generated for the block to be protected. In this source block the keyword "KNOW_HOW_PROTECT" is entered in the declaration part. The block is protected after compiling the source. More information is available in Entry ID: 10025431
Note
Issuing a password is not supported.
The Know-How protection cannot be deactivated without the STL source.

The password protection for the STEP 7 online functions is a protection against access to the CPU.
Using the password protection you can
Protect the user program and data in the CPU against unauthorized changes (write protection).
Protect the know-how contained in your user program (read protection).
Prohibit online functions that would damage the process.

Best regards,

Hamid Hosseini

Last edited by: hdhosseini at: 12/16/2011 7:42 PM

//typo

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e.memarian

12/16/2011 7:45 PM	Rate (1)
Marcjan Diamond Member Joined: 4/22/2010 Last visit: 3/31/2025 Posts: 5697 Rating: (716)	Hello, O.k. a 300, in your hardware config, goto properties of the CPU, tab protection. See attached picture. For more information about the level off protection, press F1, keyword: Password Regards, Marcjan Attachment protection.JPG (972 Downloads)
	Last edited by: Marcjan at: 12/16/2011 7:45 PM Problem solved? Please let us know! Please no technical questions by PM, use the forum sections for your questions.
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12/16/2011 7:57 PM	Rate (0)
e.memarian Posts: 5 Rating: (0)	your guidence was helpfull alot. I mean both of u, marjcam and hdhoseini. thanks alot.
e.memarian Posts: 5 Rating: (0)	Last edited by: e.memarian at: 12/16/2011 7:59 PM
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12/28/2011 4:23 PM	Rate (0)
protivogas Posts: 9 Rating: (0)	e.memarian your guidence was helpfull alot. I mean both of u, marjcam and hdhoseini. thanks alot. Be accurate... For today rescues only Step 5.5 with Block Privacyand CPU with FW V3.0or hight. Other kinds of protection: the password and KHP also can be cracked.
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12/28/2011 4:38 PM	Rate (0)
Marcjan Diamond Member Joined: 4/22/2010 Last visit: 3/31/2025 Posts: 5697 Rating: (716)	Hello, It's know that for every protection, some people find a way to unprotect. For common use the protection Siemens provide is enough. If you want more than that ,build your PLC in a safe and even then you are not sure noone is gonna steal your program. Personaly i only use protection to be sure that people with to little knowledge mess up my systems. Regards, Marcjan
	Problem solved? Please let us know! Please no technical questions by PM, use the forum sections for your questions.
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12/29/2011 8:48 AM	Rate (0)
Jazz_M Posts: 1121 Rating: (86)	Hi Well i thought the improved Block privacy setting in Step7 V5.5 is only for S7400 system Right, and not for S7300. See this link Have fun...
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12/29/2011 9:17 AM	Rate (0)
umencho Grandmaster Joined: 3/21/2006 Last visit: 10/16/2025 Posts: 10239 Rating: (1183)	No, I don't think so. Only for new CPU from v3.2 The problem is that you can't to transfer encrypted FC/FB in old CPUs. best regards, Hristo Mihalev
	Last edited by: UMENCHO at: 12/29/2011 9:20 AM
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Protection of Programs on PLC

Created by: e.memarian at: 12/16/2011 5:58 PM (11 Replies)

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Created by: e.memarian at: 12/16/2011 5:58 PM (11 Replies)

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