Delta Plc The Password Function Is Ineffective Site

[Your Name/Institution]

| Security Requirement | Delta PLC Implementation | Verdict | |----------------------|--------------------------|---------| | (Are you who you claim to be?) | Passes credential over wire in cleartext or weak obfuscation | Failed | | Authorization (Can you perform this action?) | No role separation; password unlocks full read/write | Failed | | Accounting (What did you do?) | No logging of failed/successful attempts | Failed | delta plc the password function is ineffective

The password protection function in Delta PLCs is ineffective as a security mechanism. It fails to provide confidentiality, integrity, or non-repudiation. Its design—rooted in an era of air-gapped machinery—offers only a superficial barrier that can be trivially bypassed by passive sniffing, direct memory reads, or dictionary attacks. In the context of modern industrial cybersecurity threats, such a function does more harm than good by instilling a false sense of security. Until Delta adopts standards-based authentication, the "password" should be considered a configuration lock, not a security control. [Your Name/Institution] | Security Requirement | Delta PLC

Furthermore, the function violates Kerckhoffs’s principle: the security depends on the secrecy of the protocol implementation, not on a strong cryptographic key. Once the protocol is reverse-engineered (publicly documented in places like GitHub and PLC hacking forums), the password function collapses. In the context of modern industrial cybersecurity threats,

The password function fails against three core security requirements:

[1] Delta Electronics, DVP-PLC User Manual (Programming) , 2019. [2] K. Stouffer, et al., Guide to Industrial Control Systems (ICS) Security , NIST SP 800-82 Rev. 2. [3] J. M. Moura, “Reverse Engineering Delta PLC Communication Protocol,” DEFCON 27 ICS Village , 2019. [4] IEC 62443-4-2: Security for IACS components.