File integrity verification (AEAD tag / ciphertext hash)

[codebestia]

On upload-complete, verify the stored ciphertext sha256. Document that integrity is primarily the AEAD tag (preferred) with the server-side hash as a transport-corruption check. Reject mismatches.

Acceptance criteria:

• Ciphertext hash verified server-side at completion
• Corruption produces a clear error, file stays unusable
• Decryption-time AEAD verification documented for clients

[DevALVIN-24]

@DevALVIN-24 has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Hi, I'd like to work on this issue! because I am very conversant with solving problems like this, and i can submit the pr with 48hr

ℹ️ Repo Maintainers: To accept this application, review their application or assign @DevALVIN-24 to this issue.

[TheShnider]

@TheShnider has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Hi. I have reviewed this issue and would like to work on it.

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[0xratnendra]

@0xratnendra has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Hi. I have reviewed this issue and would like to work on it....ETA 3hr

ℹ️ Repo Maintainers: To accept this application, review their application or assign @0xratnendra to this issue.

[drips-wave]

Congratulations, @0xratnendra! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on June 30, 2026.

🧑‍💻 @0xratnendra: Please resolve the issue such that the repo's maintainers have enough time to review your contribution before the due date. You'll earn Points for completing the issue on-time, which will make you eligible for a share of the Stellar Wave Program's reward pool.

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