Password synchronization communications path, or if the user is socially engineered into resetting it to a known value), all the systems that share that password are vulnerable to improper access. In most single signon and password vault solutions, compromise of the primary or master password (in other words, the password used to unlock access to the individual unique passwords used on other systems) also compromises all the associated systems, so the two approaches are similar. Depending on the software used, password synchronization may be triggered by a password change on any one of the synchronized systems (whether initiated by the user or
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