DS is a digital signal, which means that the independent variable is discrete and the dependent variable is discrete. The independent variable of this signal is represented by an integer, and the dependent variable is represented by one of the finite numbers.

2. Digital signature

DS is a digital signature, which is one of the most important concepts in the development of public key cryptography. It can provide security that other methods can't achieve, and it is similar to the traditional handwritten signature.

3, assembly language terminology

DS means data segment register in assembly language, and the segment register DS points to data segment and ES points to additional segment. When accessing operands, one of them and an offset can be combined to get the physical address of the storage unit.

Function of segment register DS

The segment register DS points to the data segment and ES points to the additional segment. When accessing operands, the physical address of the storage unit can be obtained by combining one of them with the offset. The offset may be one of a specific numerical value, a symbol address, a value of a pointer register, and the like. , the specific situation will be determined by the addressing method of the instruction.

Usually, the default data segment register is DS, but there is one exception, that is, when performing string operations, the segment register of its destination address is designated as ES. Of course, in general instructions, we can also change the segment register of the operand by changing the "segment replacement" field in the prefix.