It facilitates and accelerates operation even to command line friends. All data needed for menu and security definition are contained in the simple text file which is encrypted for runtime usage. The original text file is no longer needed and it can be stored in a safe place. Hard disk encryption All the mentioned protections are effective against normal users. However, SUP includes also a protection against booting the operating system from a diskette, and especially encryption of logical disks.
Encryption is performed in two steps.
The contents of logical disks is always entirely ciphered so that the data cannot be decrypted without knowledge of the right password. This password or encryption key are never stored on the disk. Stored there are only checksums generated by one way function. Initial encryption User can select one from four encryption algorithms. One of them is the block algorithm optimized to use 32-bit instructions on processors above 386 and some special features of 486 and Pentium processors.