![]() But you need to supply the key to the algorithm and an untrustworthy algorithm might just send the key to an untrustworthy entity. The key must never be known by an untrustworthy entity. ![]() The algorithm used to encrypt the data and.Here's why this is so hard to do:Įncryption of data always requires two main ingredients: the data is encrypted but you don't really have to care about how it is done and don't need to worry about installing software. I'm not really sure what you mean by "online" here but I am assuming you mean "transparent" i.e. This also explains why there are no "online solutions to encrypting Google Drive". Once this happens your entire encryption is useless. That machine might have malware on it that sends copies of your data and/or your key to somebody who is not supposed to have them. Then how do you access encrypted data on the library computer? Well, you don't. So if you are really concerned about the contents of your files then use an offline encryption/decryption tool on a trusted machine and upload the encrypted data to Google Drive or any other cloud file sharing service. This trust is usually only warranted if you have full control over this machine which also means that you can install software on it. In general: You need to trust the machine on which you are decrypting the files.
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