Does ChaCha20-Poly1305 need random nonce?
Clash Royale CLAN TAG#URR8PPP
$begingroup$
RFC 7539 says:
A 96-bit nonce -- different for each invocation with the same key
It doesn't explicitly say whether it has to be random or not. If we use an ever incrementing counter. Would that be secured? Generating cryptographically secured random number is a slow process.
pseudo-random-generator nonce chacha poly1305
asked Jan 26 at 17:09
Saptarshi BasuSaptarshi Basu
30018
$endgroup$
add a comment |
$begingroup$
RFC 7539 says:
A 96-bit nonce -- different for each invocation with the same key
It doesn't explicitly say whether it has to be random or not. If we use an ever incrementing counter. Would that be secured? Generating cryptographically secured random number is a slow process.
pseudo-random-generator nonce chacha poly1305
asked Jan 26 at 17:09
Saptarshi BasuSaptarshi Basu
30018
$endgroup$
add a comment |
$begingroup$
RFC 7539 says:
A 96-bit nonce -- different for each invocation with the same key
It doesn't explicitly say whether it has to be random or not. If we use an ever incrementing counter. Would that be secured? Generating cryptographically secured random number is a slow process.
pseudo-random-generator nonce chacha poly1305
asked Jan 26 at 17:09
Saptarshi BasuSaptarshi Basu
30018
$endgroup$
RFC 7539 says:
A 96-bit nonce -- different for each invocation with the same key
It doesn't explicitly say whether it has to be random or not. If we use an ever incrementing counter. Would that be secured? Generating cryptographically secured random number is a slow process.
pseudo-random-generator nonce chacha poly1305
pseudo-random-generator nonce chacha poly1305
asked Jan 26 at 17:09
Saptarshi BasuSaptarshi Basu
30018
asked Jan 26 at 17:09
Saptarshi BasuSaptarshi Basu
30018
edited Jan 26 at 17:13
Saptarshi Basu
asked Jan 26 at 17:09
Saptarshi BasuSaptarshi Basu
30018
asked Jan 26 at 17:09
Saptarshi BasuSaptarshi Basu
30018
asked Jan 26 at 17:09
Saptarshi BasuSaptarshi Basu
30018
30018
add a comment |
add a comment |
1 Answer
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$begingroup$
No, it doesn't need a random nonce. Yes, if you use an incrementing counter, that works.
As the RFC says, the only requirement is uniqueness; as long as you make sure that each nonce you use is different, you have met the requirements - an incrementing counter does that quite nicely (and, in fact, is commonly used in practice)
answered Jan 26 at 17:12
ponchoponcho
92k2145238
$endgroup$
add a comment |
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1 Answer
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1 Answer
1
active
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active
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active
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$begingroup$
No, it doesn't need a random nonce. Yes, if you use an incrementing counter, that works.
As the RFC says, the only requirement is uniqueness; as long as you make sure that each nonce you use is different, you have met the requirements - an incrementing counter does that quite nicely (and, in fact, is commonly used in practice)
answered Jan 26 at 17:12
ponchoponcho
92k2145238
$endgroup$
add a comment |
$begingroup$
No, it doesn't need a random nonce. Yes, if you use an incrementing counter, that works.
As the RFC says, the only requirement is uniqueness; as long as you make sure that each nonce you use is different, you have met the requirements - an incrementing counter does that quite nicely (and, in fact, is commonly used in practice)
answered Jan 26 at 17:12
ponchoponcho
92k2145238
$endgroup$
add a comment |
$begingroup$
No, it doesn't need a random nonce. Yes, if you use an incrementing counter, that works.
As the RFC says, the only requirement is uniqueness; as long as you make sure that each nonce you use is different, you have met the requirements - an incrementing counter does that quite nicely (and, in fact, is commonly used in practice)
answered Jan 26 at 17:12
ponchoponcho
92k2145238
$endgroup$
No, it doesn't need a random nonce. Yes, if you use an incrementing counter, that works.
As the RFC says, the only requirement is uniqueness; as long as you make sure that each nonce you use is different, you have met the requirements - an incrementing counter does that quite nicely (and, in fact, is commonly used in practice)
answered Jan 26 at 17:12
ponchoponcho
92k2145238
answered Jan 26 at 17:12
ponchoponcho
92k2145238
answered Jan 26 at 17:12
ponchoponcho
92k2145238
answered Jan 26 at 17:12
ponchoponcho
92k2145238
92k2145238
add a comment |
add a comment |
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