Abstract In his 1553 paper Giovan Battista Bellaso presented his first polyalphabetic cipher, writing that this was an improved reprint of a previous cipher of 1552 that had been printed in Venice on a loose leaflet without instructions. There was much speculation about this early cipher, since no print of that cipher was reported to have been found. Now a printed copy of that leaflet has been found in Venice by the author, and this paper is a report of that finding.

中文翻译：

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贝拉索 1552 年在威尼斯发现的密码

摘要 Giovan Battista Bellaso 在 1553 年的论文中展示了他的第一个多字母密码，并写道这是对 1552 年以前的密码的改进重印，该密码曾在威尼斯印刷在没有说明的松散传单上。关于这种早期密码的猜测很多，因为据报道没有发现该密码的印刷品。现在，作者在威尼斯发现了该传单的印刷副本，本文是该发现的报告。