In
cryptography, zeroisation (also spelled zeroization) is the practice of erasing sensitive parameters (especially
keys) from a cryptographic module to prevent their disclosure if the equipment is captured. When
encryption was performed by
mechanical devices, this would often mean changing all the machine's settings to some fixed, meaningless value, such as
zero. On machines with letter settings rather than
numerals, the letter 'O' was often used instead. Some machines had a button or lever for performing this process in a single step. Zeroisation would typically be performed at the end of an encryption session to prevent accidental disclosure of the keys, or immediately when there was a risk of capture by an adversary.
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AZZERARE. POSIZIONARE A ZERO. ASSEGNARE UN VALORE DI ZERO A
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