Nowadays it can be essential to know at what time and date a document has been created, archived or published. The local system time cannot be trusted since it is not exact and can be manipulated without any technical knowledge. A timestamp of a trusted source it required in case it needs to be legally valid.
This is even more essential for business correspondence such as electronic invoices. In most countries the sender and recipient of such correspondence have to archive these documents in a way that the date/time is documented and the archive cannot be modified after it has been sealed. (For example German signature law or the Sarbanes-Oxley Act)
Digitally signed archives
Keys used nowadays for digital signatures are still considered as save and long enough. But nobody is able to predict how long it will take that a 1024 bit key can be forged. Considering that digitally signed documents usually have to be kept between 10 and 30 years it is just a question of time that these documents become invalid due to new technologies.
To make sure that your archives don™t loose their legal validity it is essential that you re-sign and re-timestamp your archives with longer keys every time such longer keys become available.
This can easily be done with the Aloaha Timestamper. The Aloaha Timestamper packs your files into a self extracting exe file, digitally signs it and applies the timestamp of a remote trusted time stamping server.
Based on standards
The file format of the Aloaha Timestamper is kept as simple as possible to make sure the format can be read and extracted even in 30 years. Additional Aloaha will add an exe header to the archive to eliminate the need of a separate extracting utility.