ICounterBased<T>.SetKey Method

void SetKey(
	ReadOnlySpan<T> key
)

Sub SetKey ( 
	key As ReadOnlySpan(Of T)
)

void SetKey(
	ReadOnlySpan<T> key
)

abstract SetKey : 
        key : ReadOnlySpan<'T> -> unit 

Parameters

key  ReadOnlySpan<T>

The new key value. Length must exactly match KeyLength.

Setting the key changes the parameterization of the generator. The same counter value with different keys produces different output blocks.

Consistency Protocol:

After calling SetKey(ReadOnlySpan<T>), the engine enters an inconsistent state where the cached block does not correspond to the current key/counter coordinates. Callers must invoke GenerateBlock() before using any output mapping methods (Output(Int32) or Fill(Int32, Span<T>)). Invoking output methods while inconsistent results in undefined behavior.

Reference