Campbell Scientific CR3000 CR3000 Micrologger - Page 74

Section 5. System Overview 5.1.9.3.2 PakBus Instructions The following CRBasic PakBus instructions have provisions for password protection: • ModemCallBack() • SendVariable() • SendGetVariables() • SendFile() • GetVariables() • GetFile() • GetDataRecord() 5.1.9.3.3 IS Instructions The following CRBasic instructions that service CR3000 IP capabilities have provisions for password protection: • EMailRecv() • EMailSend() • FTPClient() 5.1.9.3.4 Settings Several CR3000 settings accessible with DevConfig enable the entry of various passwords. See Settings (p. 101). • 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) ) 5.1.9.4 File Encryption Encryption is available for CRBasic program files and provides a means of securing proprietary code or making a program tamper resistant. .CR files, or files specified by the Include() instruction, can be encrypted. The CR3000 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 CR3000 memory. The encrypted file overwrites and takes the name of the original. The Encryption() instructions encrypts and decrypts the contents of a file. 74