Welcome to Smoke!

Smoke is a completed open source communications project. The purpose of Smoke is to introduce and investigate the Echo protocol on mobile technologies.

Some of the characteristics of Smoke are summarized below.

• Aliases. Preserve your contacts.
• Almost zero-dependency software.
• Application lock.
• Argon2id and PBKDF2 key-derivation functions.
• Automatic, oscillatory public-key exchange protocol, via SipHash.
• BSD 3-clause license.
• Completed.
• Content is recorded via authenticated encryption.
• Decentralized. TCP, and UDP multicast and unicast.
• Does not require Internet connectivity.
• Does not require registration. Telephone numbers are not required.
• Encrypted communications.
• Eventful tasks. Limited polling.
• F-Droid.
• Fiasco forward secrecy.
• Future-proof software.
• Introduces Cryptographic Discovery. Cryptographic Discovery is a practical protocol which creates coordinated data paths.
• Juggling Juggernaut Protocol!
• Manufactured tool tips!
• McEliece Fujisaka and Pointcheval.
• Message structures do not explicitly expose contents. Header-less protocols! Some messages do include type information.
• Mobile servers via SmokeStack.
• Obfuscation of resident secret keys.
• Optional foreground services.
• Optional silence over the wires.
• Original implementation of SipHash.
• Ozone destinations: private and public repositories.
• Post offices for messages of the past.
• Private servers.
• Public and private public-key servers.
• Rainbow digital signature scheme.
• Reliable distribution of archived messages.
• Reliable distribution of deliverable text messages.
• SPHINCS digital signature scheme.
• SSL/TLS through SmokeStack.
• Semi-compatible with Spot-On via Fire.
• Share files with TCP utilities such as Netcat.
• SipHash-128.
• Smoke and mirrors.
• Software congestion control.
• Software manual included.
• Steam, reliable file sharing. TCP over the Echo!
• Steamrolling, or, real-time broadcasting of inbound Steams to fellow participants.
• Super McEliece: m = 13, t = 118.

Release Notes

• Cancel the future.
• Minimum SDK of 25.
• Partially-blocked socket reads.
• Permanent darkness.

• Removed Makefile targets as they are difficult to support: launch-emulator-1, launch-emulator-2, load-apk-release, release.
• Removed import statements.
• Removed redundant conversions.
• Replaced StringBuilder with String in some instances.
• String comparisons and equalsIgnoreCase().

• Android API 28. Older devices may not be functional.
• BouncyCastle's Rainbow implementation in version 1.73 is new. Legacy Rainbow is compromised and deprecated. A new implementation will not be included.
• Current documentation.
• Final APK release. Future releases will be source-only. Future-future releases may include APKs.
• Free server has been discontinued.
• McEliece is not functional in BouncyCastle version 1.72 and newer. A new implementation is required. This will not be addressed.
• New Rainbow parameters. Previous parameters cannot be tolerated.

• Corrected state of Purge Fiasco Keys context menu item in Member activity.

• Forceful termination of TCP sockets on severe errors.

• Emergency initialization of singletons, if possible.

• New Steams will be initially unlocked.
• Toggle Lock Status context-menu item in Steam activity.

• Steam is now functional on Android 10 and 13. Do not interpret an integer as a Base64.

• Corrected state of Delete Fiasco Keys context menu item.

• Corrected error text.
• Do not disable generate widgets during generation functions. Progress widgets are sufficient.
• Enable Participants context-menu items if data are available: Delete Fiasco Keys, Delete Public Keys.
• Reverted to Bouncy Castle 1.71 as key generation fails in 1.72.

• Bouncy Castle 1.72.
• Happy New Year!
• Retain Selection State in Member activity. Session only.

• Bouncy Castle 1.71.
• Optional message-read responses.
• Steam unlocking.

• Documentation.
• Larger touch areas.
• New public server.

• A neighbor removed from Settings will be deleted in a separate task.
• Avoid accessing encrypted database content if not authenticated: publishing keys, publishing status, retrieving messages.
• Corrected RSA key size for Steam: 3072, not 3096.
• New parameters for Rainbow. Please read https://eprint.iacr.org/2022/214.
• Proper termination of Smoke service.
• Terminate connections on TLS handshake errors.

• Enable SO_LINGER on TCP sockets.
• Fewer Context objects.
• Monospace fonts.

• Bouncy Castle 1.70.
• Notify Member Chat of new Steams.

• Concurrent collections.
• Introduced new database table index for Member Chat.
• Lock safety.
• Rainbow digital signature scheme.
• Release Ringtone resources.
• Sphincs digital signature scheme.
• Steam locking, or, prevent the replacement of completed transfers.
• Write identities in silent mode.

• Allow removal of Fiasco keys from Member activity.
• Concurrent collections.
• Decreased lock regions.
• Limit execSQL(): cannot be delete / insert / select / update.
• Resume All Steams context-menu option.
• Silence over the wires. Optional.
• Steam percents.
• Wrap switches.

• Avoid extending received Steam names.
• Bouncy Castle 1.69.
• Improved SQLite selection of deliverable messages.
• JuggerLi, or, the Juggernaut protocol via xor(public keys).
• Prevent duplicate offset acknowledgments in Steam.
• Steamrolling, or, sharing complete and incomplete Steams.

• Ignore duplicate calling keys.
• Message details in Member Chat activity.
• Tulip server discontinued.

• Corrected raw SQLite queries.
• Decreased awaitTermination() values. Method may stall Smoke.
• ETags for bypassing congestion.
• Reliable distribution of deliverable text messages. Requires reinstall as new database fields have been introduced.
• Replaced checkboxes with switches.
• Tool tips.
• Warn if the time server cannot be queried.

• Fewer locks.
• Improved process termination.
• New server tulip-ipv4.tilaa.cloud.

• Retain Fire messages.
• Weak references.

• Corrected reset of local authentication key.
• Obfuscate local authentication and encryption keys.
• Prepare Steam key container properly.

• Avoid creating tasks for completed Steams.
• Free Steam resources.
• Sort sub-title IP address.

• Bouncy Castle 1.68.
• Corrected comparisons of byte arrays.
• Disable context menus if public keys are not available.
• Estimate the number of physical cores for Argon2id. Smoke must be reinstalled.
• Future-proofing Smoke.
• Guard String.indexOf().
• Hide ephemeral key types for Other Steam destinations.

• Future-proofing cryptographic primitives.
• New Steam database field. Please reinstall Smoke.
• Permanent RSA keys are now 4096 bits.
• Steam keys: McEliece, RSA.
• Super McEliece (m = 13, t = 118).

• Bouncy Castle 1.67.
• Disable Chat:Send if there is at least one selected participant without a session key pair.
• Efficient ArrayList::remove(). Remove from the end of the array.
• Full, reliable, Steam! File sharing.
• Improved TLS handshake-completed state.
• Issue Settings::prepareListeners() shortly after the Settings activity has been instantiated.
• Monitor connection activity; decreased polling.
• Notify the user of incorrect device time via https://worldtimeapi.org/api/timezone/Etc/UTC.txt. Optional.
• Prepare initial private keys during a public-key exchange.
• Provide message-read responses to SmokeStack instances.
• Random identities need not be recorded to databases.
• Removed SecureRandom.getInstance("SHA1PRNG").
• Removed verbose threads and replaced with events.
• Request Ozone messages shortly after a TCP connection has been established or a TLS session has been established.
• SipHash-128.
• Write local identity immediately upon completion of TLS handshake.

• Artificial random-access Steam files.
• New Scripts directory.
• Retain Steam rates.

• Clear Smokescreen password.
• Static variables.

• Bouncy Castle 1.65!
• Denote Juggernaut protocol failures and successes.
• Kernel broadcast receiver for immediate delivery of internal instructions.
• McEliece Pointcheval conversion. Smoke must be reinstalled!
• Non-TLS devices.
• Partial Steam.
• Passthrough devices.
• Smokescreen, or, application lock.

• Happy New Year!
• New Argon2id parameters.

• Argon2id key-derivation function.

• Corrected the private server authentication protocol.

• Bouncy Castle version 1.64.
• Corrected primary key in participants table. Please remove Smoke.
• Corrected widget states during initialization.

• Bouncy Castle version 1.63.
• Exit option. May be incomplete on some devices.
• Guard socket buffers.
• New icons.
• Save attachments to Downloads (Internal Storage -> Download).
• Settings -> View Details functional on Android 9.

• JuggerKnot.
• Properly create strings from bytes. Ozones and participants must be redefined.

• Allow removal of participant public keys.
• Close Java streams.
• Default socket buffer sizes.
• Juggernaut Protocol.
• Minor Fire layout changes.
• Release resources on onPause(), onStop().
• Removed deepCopy().
• Smoke Alias. Change your credentials while preserving your relationships.

• Allow removal of specific messages in MemberChat.
• Decreased maximum buffer size from 32 MiB to 8 MiB.
• Prefer delete() over setLength(0) on buffers.
• Recycle bitmaps.

• Bouncy Castle version 1.61.
• Material icons.
• Optional foreground service.

• Array lengths may not be negative.
• Automatic removal of incorrect network data. Smoke and SmokeStack.
• Corrected conditional in UdpMulticastNeighbor::send(). SmokeStack.
• Disable Nagle's algorithm.
• Energy and iterations.
• Optional initialization of Ozone during neighbor definition.
• Orderly shutdown of schedules.
• Pause schedules, notify if necessary.
• Replaced Spongy Castle with Bouncy Castle. Please replace existing listeners. SmokeStack.
• SNAP!
• Smaller lock regions.
• SmokeStack confirmation for identity sharing of personal identity.
• StringBuilder over StringBuffer if possible.

• Compute SHA-512 display digest of PEM(certificate).
• Inspect length in String::substring().
• New server (tulip-ipv4.tilaa.cloud).

• Allow resending of messages.
• Deleting Fiasco keys lacked proper confirmation.
• Denote messages which have been read by the recipient.
• Denote messages which have been sent.
• Depict Smoke failures.
• Lock SipHash::hmac().
• New participants_messages database fields. Requires new installation.

• Allow generation of only PK material in Settings.
• Allow new participant names via context menus; Settings::Participants.
• Automatically set the Ozone to the Smoke ID on new installations.
• Blocking socket reads.
• Bouncy Castle at version 1.60.
• Calling via ephemeral McEliece; MemberChat only.
• Clear internal messaging log on Chat::Clear.
• Corrected faulty widget listeners in Fire.
• Corrected slight time differences between time stamps in messages destined for SmokeStacks and messages destined for participants.
• Increased key-publishing period from 15 seconds to 45 seconds. Also removed self-publishing.
• Material Design-compliant color selections.
• McEliece parameters m = 12, t = 68. Compatibility with m = 11, t = 50 is preserved.
• Messages in MemberChat will not be duplicated in the Chat activity.
• New Fiasco Keys column in Settings::Participants.
• New chat-message format. Incompatible with previous releases.
• Pause threads when possible.
• Periodically request Ozone messages.
• Private servers through SmokeStack.
• Removed the superfluous name field from the participants database table.
• Replaced complex if-statements with switch statements.
• Several member variables in the Neighbor class were defined as static. Corrected.
• Share capabilities and identities shortly after the SSL/TLS handshake has completed on TCP sockets.
• Shared keys without signatures are now accepted and properly depicted in Settings.
• Sign encryption and signature public keys as pairs.
• Singular member pages. Single image attachments included.
• Uniquely-persistent Fire identities.
• Viewing of member details now available via Settings::Participants context menu.

• LocalBroadcastManager instances.
• Single ID per Fire.

• Congestion-control improvements.
• Corrected nested locks (isNetworkConnected()).
• Insert-or-throw SQLite database queries.
• The ProgressDialog class has been deprecated. ProgressBars have now been added.
• The replace method may not be available in a hash table; put().

• Attempt socket connections regardless of WiFi availability. Insight.
• Automatically import rosemary-ipv4.tilaa.cloud:4710 on new installations.
• Corrected local echo behavior.
• Echo Fire, if possible!
• Fire Digest Key and Salt fields may not be empty. Corrected.
• Host translation must be performed before every socket connection attempt.
• Large-area congestion-control mutex.
• Partition messages over UDP links into 576-byte datagrams.
• Provide the HMAC algorithm during identity distribution.
• The Call widget should only be enabled if a network is present.
• Wonderful documentation.

• Allow empty Fire participant names.
• Allow purging of neighbor queues.
• Automatic, oscillatory EPKS.
• Avoid non-essential operations if network channels are not available.
• Depict corrupted database entries.
• Enabled Nagle's algorithm.
• Introduced McEliece-Fujisaka via Bouncy Castle. Cross-communications supported.
• Minimum password length set to one character.
• New Fire key generation. Destination tags are required for SmokeStack.
• Participant name changes should be reflected in the Chat activity.
• Trim Channel, Digest Key, and Salt values on Fire.

• Fire, or, group communications. Compatible with Spot-On.
• Increased lane widths to 8 MiB.

• Set a non-zero SO_TIMEOUT as some devices do not unblock socket reads after sockets are closed.

• AndroidManifest.xml was missing WakeLock permissions.
• Do not attempt to send duplicate data.
• Do not specify timeouts in socket reads as separate threads are responsible for socket reads.
• Removed all Thread.sleep() instances.
• Replaced StringBuilder Neighbor member with StringBuffer. StringBuffer is thread-safe.
• Signed release.
• WiFi lock.

• Less activity on disconnected neighbors.

• Detect existing key pairs in writeParticipant().
• Smaller database transaction areas.

• Do not automatically purge the temporary identity for offline message retrieval unless some inactive period has elapsed.
• Issue SQLiteDatabase.update() whenever a participant is added. This will allow for replacing of participant names without removal of existing data.
• SmokeStack as a private public key repository.

• Independence Day!