So What Is Base-45, And Where Is It Used?

Prof Bill Buchanan OBE
2 min readSep 4, 2021

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If you are into Cybersecurity, Base-64 should be a well-known format, and often used to convert binary data into a text format. In Bitcoin, we use Base-58 for the Bitcoin address. But, what is Base-45?

Well, your vaccine status document probably contains a QR code, and which uses Base-45 format for the data coding [article]. With Base-45 format, we have 45 characters defined. The encoding…

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Prof Bill Buchanan OBE

Professor of Cryptography. Serial innovator. Believer in fairness, justice & freedom. Based in Edinburgh. Old World Breaker. New World Creator. Building trust.