Cipher
Free AppAbout Cipher
Qubinox Cipher is an encryption tool that uses One Time Padding (OTP) to encrypt and decrypt messages which can then be transmitted and received using e-mail or messaging apps.
The sender and receiver must have an identical random key file on their SD cards, this file should be generated and exchanged in person in advance of communication. Future versions may support additional less secure algorithms without this requirement.
OTP is unbreakable when used with a truly random key ("Communication Theory of Secrecy Systems", C. E. Shannon, 1949).
The sender and receiver must have an identical random key file on their SD cards, this file should be generated and exchanged in person in advance of communication. Future versions may support additional less secure algorithms without this requirement.
OTP is unbreakable when used with a truly random key ("Communication Theory of Secrecy Systems", C. E. Shannon, 1949).
All Application Badges
Free
downl.
downl.
Android
2.2+
2.2+
Android app
App History & Updates
What's Changed
Changed key size entry field from MB to KB.
Changed key size entry field from MB to KB.
More downloads Cipher reached 100 - 500 downloads
Version update Cipher was updated to version 1.0.1
More downloads Cipher reached 50 - 100 downloads
What are users saying about Cipher
T
by T####:
by T####:
Just one thing. Why does the app always decode a message, created with current key file no matter what key position was set. It should decode only if the right position was set as key. Now it decodes the message every time.
I
by I####:
by I####:
This is a great app but it needs to be able to generate keyfiles of identical size to the actual message typed. What I mean is: If the message is 30KB in size, then the keyfile should 30KB in size. Any keyfile larger then the message itself just wastes space. Since as far as what I can see, 1.00MB is the smallest keysize. This means that even if you have a 900KB message, that still is 100KB of wasted space. Thanks for the reply, The reason for this was also because the whole concept of the One-Time Pad relies on the fact that both the message and the key are the same size. This creates a Ciphertext of the same size too. Because of the fact that message, key, and ciphertext are the same size, no form of cryptanalysis can be used on the message apart from blind brute force.
J
by J####:
by J####:
This is a great app but it needs to be able to generate keyfiles of identical size to the actual message typed. What I mean is: If the message is 30KB in size, then the keyfile should 30KB in size. Any keyfile larger then the message itself just wastes space. Since as far as what I can see, 1.00MB is the smallest keysize. This means that even if you have a 900KB message, that still is 100KB of wasted space. Thanks for the reply, The reason for this was also because the whole concept of the One-Time Pad relies on the fact that both the message and the key are the same size. This creates a Ciphertext of the same size too. Because of the fact that message, key, and ciphertext are the same size, no form of cryptanalysis can be used on the message apart from blind brute force.
by V####:
Excellent app, but hasn't been updated for a while, is it because there isn't any need, or because its been neglected?