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Birthday problem / Birthday paradox

by wabaus
A great description of the concept/math behind the Birthday problem. Basically, if you have 23 people in a room, odds are better than 50-50 that 2 folks will share the same birthday. [With a group of 7, odds are better than 50-50 that two folks have a birthday within a week of each other.] Also the basis for the "Birthday attack" hacking vector. Given a hashing (1-way encryption) algorithm of fixed length output, multiple inputs can result in the same hash. It is very difficult to guess an alternate input that will hash into a match of a single given result. But given a large known set of results (e.g., a user account database table) it become more likely that an alternate input might result in a match of at least one existing hash. Thinking on such things keeps the mind sharp :)



by JayFre (via)
pxview is a program to read Paradox database files. It is based on the pxlib library. pxview allows to output csv for reading with spread sheets, sql to import into a relational database, html and sqlite.


pain and pleasure

by ryanne
[tuesday, 23 august 2005] "but beauty has to undergo some limited torture". how true! and it applies not only to ear piercing =) thanks, nat....

PUBLIC TAGS related to tag paradox

attack +   beauty +   birds +   birthday +   christianity +   cost +   database +   despair +   developer +   disappointment +   ear +   encouragement +   friend +   hack +   hymn +   longdistance +   love +   lyrics +   Natalie +   pain +   photography +   piercing +   pleasure +   problem +   public +   quote +   relationship +   tautology +   ticon +   torture +  

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