{"product_id":"rsa-shirt-code-canvas","title":"RSA Shirt","description":"\u003cp\u003eThree lines of Perl that implement RSA encryption, written by Adam Back in 1995. At the time, the U.S. government classified strong cryptography as a munition under the International Traffic in Arms Regulations — exporting it was a federal crime carrying up to 10 years in prison. Cypherpunks printed these three lines on T-shirts and wore them to airports as deliberate civil disobedience. The shirts were, technically, illegal weapons.\u003cmeta charset=\"utf-8\"\u003eThe protests helped force the late-1990s loosening of cryptographic export controls and contributed to the legal precedent — established in Bernstein v. United States (1999) — that source code is protected speech under the First Amendment.\u003c\/p\u003e\n\u003cp\u003eSource: Code by Adam Back, 1995. Originally published at cypherspace.org during the cypherpunk export protests. Attribution given as a matter of historical record; permission inquiry pending.\u003c\/p\u003e","brand":"Canvascript","offers":[{"title":"20\"×16\" \/ Dark","offer_id":47966718197914,"sku":"rsa-shirt-one-dark-pro-20x16-canvas","price":69.0,"currency_code":"USD","in_stock":true},{"title":"20\"×16\" \/ Light","offer_id":47966718230682,"sku":"rsa-shirt-one-light-20x16-canvas","price":69.0,"currency_code":"USD","in_stock":true},{"title":"24\"×20\" \/ Dark","offer_id":47966718263450,"sku":"rsa-shirt-one-dark-pro-24x20-canvas","price":89.0,"currency_code":"USD","in_stock":true},{"title":"24\"×20\" \/ Light","offer_id":47966718296218,"sku":"rsa-shirt-one-light-24x20-canvas","price":89.0,"currency_code":"USD","in_stock":true},{"title":"30\"×24\" \/ Dark","offer_id":47966718328986,"sku":"rsa-shirt-one-dark-pro-30x24-canvas","price":119.0,"currency_code":"USD","in_stock":true},{"title":"30\"×24\" \/ Light","offer_id":47966718361754,"sku":"rsa-shirt-one-light-30x24-canvas","price":119.0,"currency_code":"USD","in_stock":true},{"title":"40\"×30\" \/ Dark","offer_id":47966718394522,"sku":"rsa-shirt-one-dark-pro-40x30-canvas","price":159.0,"currency_code":"USD","in_stock":true},{"title":"40\"×30\" \/ Light","offer_id":47966718427290,"sku":"rsa-shirt-one-light-40x30-canvas","price":159.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0407\/8282\/3578\/files\/mockup-preview-one-dark-pro-24x20_7700a366-8fd9-4306-b600-54b1a3f65327.jpg?v=1779771096","url":"https:\/\/canvascript.com\/products\/rsa-shirt-code-canvas","provider":"canvascript","version":"1.0","type":"link"}