Password strength strong passwords for a smaller number of high-value applications such as for online banking. A single "master" password can be used with software to generate a new password for each application, based on the master password and the application's name. This approach is used by Stanford's PwdHash, Princeton's Password Multiplier, and other stateless password managers. In this approach, protecting the master password is essential, as all passwords are compromised if the master password is revealed, and lost if the master password is forgotten or misplaced. A reasonable compromise for using large numbers of passwords is to record them in a
Most recent common ancestor Most recent common ancestor In biology and genealogy, the most recent common ancestor (MRCA, also last common ancestor (LCA), or concestor) of any set of organisms is the most recent individual from which all the organisms are directly descended. The term is also used in reference to the ancestry of groups of genes (haplotypes) rather than organisms. The MRCA of a set of individuals can sometimes be determined by referring to an established pedigree. However, in general, it is impossible to identify the exact MRCA of a large set of individuals, but an estimate of the time at which the