Like [base64], but without these characters: +/0O1l

This is the definition of base58 as used by bitcoin.
(there is apparently a different version of base58 used by Flickr)


The rationale behind the use of base58 is:

  * Don't want 0OIl characters that look the same in some fonts and could be used to create visually identical looking account numbers.
  * A string with non-alphanumeric characters is not as easily accepted as an account number.
  * E-mail usually won't line-break if there's no punctuation to break at.
  * Doubleclicking selects the whole number as one word if it's all alphanumeric.


The alphabet used is:  "123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz"

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[JMN 2011-06-28] Does anyone know if there are existing Tcl implementations of base58 as used by bitcoin?


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%| [Category Currency] | [Category Cryptography] | [Category Internet] |%
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