Hello, kochetkov.vladimir, you wrote: KV> Hello, fin_81, you wrote: _>> we Change trust to themselves, trust "good password manager". KV> That the trust to itself was justified, it is necessary to understand, as well as on the basis of what firmness protection is added. It is obvious that considering the 25-symbolical password the adequate decision, it not quite understand. And limits of human storage are that, what even the ten passwords with comprehensible entropy there to contain extremely heavily. And consequently, passwords will be at once on several sites. That is "faugh-faugh-faugh", even irrespectively to their firmness to search. _>> a hyperbola: billions flies are more predicted, than is unique correct "good password manager". KV> About "it is unique correct" speech in article does not go - their tens. With usage the manager the automatic machine solves problems of low entropy (for the account of automatic generation of casual passwords) and reusages of passwords (what difference to store in the manager of 10 passwords or 100?) . The master Password elementarily amplifies with the help 2FA which the overwhelming majority of modern managers is able. To use 100 different passwords on 100 different sites the manager who puts the password and a site in correspondence is necessary. That is a bottleneck here the manager. It is possible to break a method of storage of passwords the person, or it is possible to break this manager of passwords. I am not assured that the manager of passwords who stores passwords in predicted files, encodes and decodes on predicted processors in predicted areas of storage, on predicted and easily lost devices, is more reliable, than a yet not probed human body. Entropy as firmness is a spherical vacuum in a game. How to tell a scientific method, show on experiments that the new trust relationships policy somehow influences percent passwords. Complicating the protocol, correctness of application of the protocol becomes complicated. And in practice a policy when every month the new password in which should be a minimum of 11 characters of the Russian rouble, leads to appearance of the manager of passwords in the form of stickers on the monitor. And yes, tens managers it is infinite less amounts of flies. Firmness of the manager is a firmness of the manager, cracked the manager, cracked 100 sites. Firmness of 10 passwords on 100 sites is a firmness of 10 passwords on 100 sites.