Keywords: Linked list post office box analogy 2.svg en The post office box analogy for a linked list Suppose Alice is a spy who wishes to give a codebook to Bob by putting it in a post office box and then giving him the key However the book is too thick to fit in a single post office box so instead she divides the book into two halves and purchases two post office boxes In the first box box 201 she puts the first half of the book and a key to the second box and in the second box box 102 she puts the second half of the book She then gives Bob bottom a key to the first box Derived from public domain works File Paperback book black gal svg File Public key shared secret svg File Emblem-person-blue svg 2011-06-14 Linked_list_post_office_box_analogy svg 2011-08-27 10 09 UTC Linked_list_post_office_box_analogy svg Dcoetzee derivative work Pluke <span class signature-talk >talk</span> increased the size Linked_list_post_office_box_analogy svg Cc-zero Original upload log This image is a derivative work of the following images File Linked_list_post_office_box_analogy svg licensed with Cc-zero 2011-06-14T21 26 48Z Dcoetzee 224x410 34755 Bytes <nowiki></nowiki> Uploaded with derivativeFX Linked lists |