Partitioning my digital life into security domains

The scheme divides a person’s digital activities into isolated Qubes OS application domains, with trust indicated by colored window borders and network access limited to what each task needs. WORK holds confidential work email, documents, and keys, but can connect only to the work mail server; WORK-PUB handles less-trusted work browsing. PERSONAL and VERY-PERSONAL separate ordinary personal activities from private, encrypted conversations. SHOPPING and BANKING isolate financial tasks, while WORK-ADMIN, WORK-BLOG, and QUBES-DEV separate server administration, blog editing, and software development - especially signing releases. ACCOUNTING contains invoices, WORK-ARCHIVES stores older work material, and an offline VAULT protects master keys and passwords. RED is disposable and untrusted, for activities that need no sensitive information. The guiding principle is to limit the damage any compromised browser, file, or service can cause.

The difficult problem is moving information from less-trusted domains into more-trusted ones: even pasting a URL or importing an image could deliver malicious input that exploits the receiving application. High-security systems sometimes accept such transfers if data can never flow back, but guaranteeing that requires eliminating covert channels between cooperating domains, with serious performance costs. The author rejects this approach for Qubes, arguing that preventing leaks does not protect the integrity of a compromised trusted domain. A more practical possibility is trusted converters or verifiers that safely process particular file types before transfer, though the challenge is ensuring they produce genuinely safe output.