Extracting text from a PDF document is one of the most popular information retrieval function. But how about other information such as images, metadata and more? It can be simple - but also tricky.
Using blockchains as an alternative to PKIs for digital signatures
The traditional technical environment for a digital signature is the public key infrastructure (PKI). Digital signatures are also used to implement electronic money such as Bitcoin. However, Bitcoin uses a new technology, the blockchain. This new technical infrastructure can also be employed to sign documents. But what are the benefits?
How to render the text of a PDF document if the font is not embedded?
Every developer of a PDF viewer, a PDF printer and a PDF to Image Converter tool comes across the requirement to render non embedded fonts and is facing quite a challenging task. Not only developers but also users of these tools might be interested in non embedded fonts and how they are treated by these tools.
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