# Gavin Andresen
# 2012-12-31 19:38:16
# https://bitcointalk.org/index.php?topic=134032.msg1428096#msg1428096

How will you know if people tend to pick the same types of events, and, therefore, create big non-random clusters of choices that might be easily brute-forced? @p{par}

Taking an idea from @s{(link)}... @p{par}

.... you could store a small number of bitcoin at private key = SHA256(memory_key), store the bulk of bitcoin at scrypt(Name+PIN+memory_key), and tell users to choose a new memory key if the SHA256(memory_key) coins are either ever spent or if that key ever gets funds from somebody else. @p{par}

Because that means somebody else chose the same memory key. @p{par}

 @p{brk}