After the source code for Philip Zimmermann's Pretty Good Privacy (PGP) encryption program found its way onto the Internet in June 1991, a complaint by RSA Security (then called RSA Data Security, Inc.) resulted in a lengthy criminal investigation of Zimmermann by the US Customs Service and the FBI, though no charges were ever filed.
Setelah kode sumber program Pretty Good Privacy (PGP) milik Philip Zimmermann ditemukan dan digunakan Internet pada Juni 1991, terdapat komplain oleh RSA Security (yang kini dinamakan RSA Data Security, Inc.) menyebabkan investigasi kriminal yang panjang US Costum Service dan FBI, walaupun tidak ada tuntutan yang diberikan kepada Zimmermann.