In computer security related terminology a seed is one of the factors used to create (a series of) seemingly random numbers or strings. Consider for example Domain Generating Algorithms or encryption keys that are created on the fly. In the combination of factors, the seed is the constant that is the same for one set of random items. For example, the seed for the file encryption used on one victim, can be unique for that victim and for all his files. The seed for one series of generated domains is generally the same until the author switches to a new variant of the malware using the domains.