Section 5. System Overview
74
5.1.10.3.2 PakBus Instructions
The following CRBasic PakBus instructions have provisions for password
protection:
• ModemCallBack()
• SendVariable()
• SendGetVariables()
• SendFile()
• GetVariables()
• GetFile()
• GetDataRecord()
5.1.10.3.3 IS Instructions
The following CRBasic instructions that service CR800 IP capabilities have
provisions for password protection:
• EMailRecv()
• EMailSend()
• FTPClient()
5.1.10.3.4 Settings
Several CR800 settings accessible with DevConfig enable the entry of various
passwords. See Settings
(p. 96).
• PPP Password
• PakBus/TCP Password
• FTP Password
• TLS Password (Transport Layer Security (TLS) Enabled)
• TLS Private Key Password
• AES-128 encrypted PakBus communications encryption key (see
Communications Encryption
(p. 75) )
5.1.10.4 File Encryption
Encryption is available for CRBasic program files and provides a means of
securing proprietary code or making a program tamper resistant. .CR<X> files, or
files specified by the Include() instruction, can be encrypted. The CR800
decrypts program files on the fly. While other file types can be encrypted, no tool
is provided for decryption. The CRBasic Editor encryption facility (Menus | File
| Save and Encrypt) creates an encrypted "copy" of the original file in PC
memory. The encrypted file is named after the original, but the name is appended
with "_enc". The original file remains intact. The FileEncrypt() instruction
encrypts files already in CR800 memory. The encrypted file overwrites and takes
the name of the original. The Encryption() instructions encrypts and decrypts the
contents of a file.
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