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For example, commercial vendors must show records tostockholders and tax auditors. One use of certificates that we have already discussed is that of certifying a name for agiven key. We review this scheme in this section, and borrow ideas from it in the next. The laws of commerce, which were established in a marketplace where sellers andbuyers met face-to-face, cannot be expected to meet the needs of electronic commerce, therapidly expanding use of computer and communications technology in the commercialexchange of products, services, and information.

Second, even if notarizing t somehow protected it from fraudulent manipulation, what would prevent the customer from "forgetting" that this transaction ever occurred. Thus when a verifying party requests certificates to verify john smith’s signature theymay receive a number of completely trustworthy certificates, none of which they can trustbecause they have no way of knowing which one to use! If they then proceed to use theone that they deem most likely to be correct, they have injected a human guess into whatwas described and relied upon as a cryptographically strong process.