Friday, July 30th, 2021

Time	Event
2:25p	Storing Encrypted Photos in Google’s Cloud New paper: “Encrypted Cloud Photo Storage Using Google Photos“: Abstract: Cloud photo services are widely used for persistent, convenient, and often free photo storage, which is especially useful for mobile devices. As users store more and more photos in the cloud, significant privacy concerns arise because even a single compromise of a user’s credentials give attackers unfettered access to all of the user’s photos. We have created Easy Secure Photos (ESP) to enable users to protect their photos on cloud photo services such as Google Photos. ESP introduces a new client-side encryption architecture that includes a novel format-preserving image encryption algorithm, an encrypted thumbnail display mechanism, and a usable key management system. ESP encrypts image data such that the result is still a standard format image like JPEG that is compatible with cloud photo services. ESP efficiently generates and displays encrypted thumbnails for fast and easy browsing of photo galleries from trusted user devices. ESP’s key management makes it simple to authorize multiple user devices to view encrypted image content via a process similar to device pairing, but using the cloud photo service as a QR code communication channel. We have implemented ESP in a popular Android photos app for use with Google Photos and demonstrate that it is easy to use and provides encryption functionality transparently to users, maintains good interactive performance and image quality while providing strong privacy guarantees, and retains the sharing and storage benefits of Google Photos without any changes to the cloud service (Comment on this)
8:01p	I Am Parting With My Crypto Library The time has come for me to find a new home for my (paper) cryptography library. It’s about 150 linear feet of books, conference proceedings, journals, and monographs — mostly from the 1980s, 1990s, and 2000s. My preference is that it goes to an educational institution, but will consider a corporate or personal home if that’s the only option available. If you think you can break it up and sell it, I’ll consider that as a last resort. New owner pays all packaging and shipping costs, and possibly a purchase price depending on who you are and what you want to do with the library. If you are interested, please email me. I can send photos. EDITED TO ADD (8/1): I am talking with two universities at the Internet Archive. It will find a good home. Thank you all for your suggestions. (Comment on this)

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