One of the PDFDocument features added in Xojo 2022r2 is the ability to encrypt PDF files created with Xojo. Continue reading and I will show you how.
I’ve learned over the years not to have any specific expectations from Apple’s WWDC keynote. Some years they introduce something big and new that we were pretty much expecting. Other years they blindside us. As the CEO of a company that creates tools for building apps for most of Apple’s ecosystem and given Apple’s history of secrecy, I’m understandably curious just how blindsided I might be each June. Fortunately, this year’s keynote was filled with features that ranged from mildly interesting to really awesome but all incremental improvements across Apple’s software line.
Xojo 2021 Release 3 has a few improvements to the Crypto module that you might find useful such as SHA3, BlowFish/TwoFish and CRC-32.
Our vision for Xojo Cloud is a simple, one-click deployment option for your web app. Xojo Cloud allows you to focus on developing your app instead of dealing with the nitty gritty details of web hosting and security. Xojo Cloud has tons of new stuff to compliment apps built with Xojo 2020r1!
ARC4 is a symmetric encryption algorithm fast and easy to implement. Being symmetric does means that it uses the same function with the same key (varying from 40 to 2048 bits) both for cyphering and de-cyphering a block of data.
Is it the most secure or robust encryption algorithm around? Not really. But it provides a good amount of performance and you can take further steps in order to correct some of its flaws. So, continue reading if you are interested in having this one in your developer toolset implemented as a Class with separate methods to encrypt and decrypt a block of information (even if it uses the same function in both cases).
In an ideal world there is a person responsible for every step in software development, from coding, UI design, distribution, documentation, marketing and support. All of this can seem really overwhelming for independent developers and small businesses. But if you break it down and take it one piece at a time, it’s manageable by even the smallest team of one. Right now, let’s look at software distribution.
For software, distribution usually means generating and validating unique serial numbers for each of your products and users. Serial numbers (or license keys) help you manage your users, unlock a free trial or demo version for full use and, of course, minimize illegal use of your apps.
Last month the Australian government suggested they might require tech companies to provide back doors into their systems to help law enforcement use those back doors to catch bad guys. Apple immediately dispatched people to go talk with them about it. Apple’s stance has been that such back doors don’t help catch bad guys and just make the rest of us less secure. Is that really true?
Among other topics, Cryptography and data ciphering always fascinated me. Beyond their mathematical perspective, most of the time it is a matter of putting them in practice with developed solutions: dealing with data only visible between the transmitter and the receiver. As it happens, the Xojo framework makes it really easy to deal with ciphered data.