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The '''YAK''' is a public-key authenticated [[key agreement protocol]].<ref>F. Hao, [http://sites.google.com/site/haofeng662/YAK-short-final.pdf On Robust Key Agreement Based on Public Key Authentication]. ''Proceedings of the 14th International Conference on Financial Cryptography and Data Security, Tenerife, Spain, LNCS 6052, pp. 383-390, Jan, 2010.</ref> It is considered the simplest among the related protocols, including [[MQV]], HMQV, [[Station-to-Station protocol]], [[Secure Sockets Layer|SSL]]/[[Transport Layer Security|TLS]] etc. The authentication is based on public key pairs. As with other protocols, YAK normally requires a [[Public Key Infrastructure]] to distribute authentic public keys to the communicating parties. The author suggests that YAK may be unencumbered by patent.
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==Description==
 
Two parties, Alice and Bob, agree on a group <math>G</math> with generator <math>g</math> of prime order <math>q</math> in
which the discrete log problem is hard. Typically a [[Schnorr group]] is used. In general, YAK can use any prime order group
that is suitable for public key cryptography, including [[elliptic curve cryptography]]. Let <math>g^a</math> be Alice's long-term public key and <math>g^b</math> be Bob's. The protocol executes in one round.
 
'''One round''': Alice selects <math>x \in_R [0, q-1]</math> and sends out <math>g^x</math> together with a [[zero-knowledge proof]] (using for example [[Schnorr signature]]) for the proof of the exponent <math>x</math>. Similarly, Bob selects <math>y \in_R [0, q-1]</math> and sends out <math>g^{y}</math> together with a [[zero-knowledge proof]] for the proof of the exponent <math>y</math>.
 
The above communication can be completed in one round as neither party depends on the other. When it finishes, Alice and Bob verify the received [[zero-knowledge proofs]]. Alice then computes <math>K = (g^{y} g^{b}) ^ {x + a}= g^{(x + a) (y + b)}</math>. Similarly, Bob computes <math>K = (g^{x} g^{a}) ^ {y + b} = g^{(x + a) (y + b)}</math>. With the same keying material <math>K</math>, Alice and Bob can derive a session key using a [[cryptographic hash function]]: <math>\kappa = H(K)</math>.
 
==Security properties==
 
Given that the underlying [[Non-interactive zero-knowledge proof|zero knowledge proof]] primitive is secure, the YAK protocol is proved to fulfill the following properties.
 
# '''Private key security''' - An attacker cannot learn the user's static private key even if he is able to learn all session specific secrets in any compromised session.
# '''Full forward secrecy''' - Session keys that were securely established in the past uncorrupted sessions will remain incomputable in the future even when both users' static private keys are disclosed.
# '''Session key security''' - An attacker cannot compute the session key if he impersonates a user but has no access to the user's private key.
 
==References==
 
<references/>
 
==External links==
* [http://eprint.iacr.org/2010/136.pdf On Robust Key Agreement Based on Public Key Authentication (Full Paper)]
 
[[Category:Cryptography]]
[[Category:Cryptographic protocols]]

Revision as of 15:51, 18 February 2014



In any properly equipped residence kitchen or restaurant kitchen, the knife which is most made use of will constantly be a superior chef knife. So here it is.. My 1st review! This shun knife is a work of art and has razor sharp edge with a layered Damascus steel with a hand-hammered finish (identified as 'Tsuchime' in Japanese) A tiny bit extra costly but you will not be disappointed as this knife will also last a lifetime if taken care of. Ceramic is a comparatively new material to the culinary knife market place and they are proving to be a excellent kitchen tool.

Measuring Cups and Spoons You will need to have a separate set of measuring cups for liquid (2- or 4-cup capacity) and dry components. Wood or bamboo is less difficult on knife edges, though plastic boards are lighter and can be tossed in the dishwasher for cleaning. Consider whether a knife is forged (hand-molded after an intense heat method) or stamped (flattened into shape by common cutters).

This blade is also super thin, which makes it not a good knife to use for chopping huge things like bones and Best Italian Steak Knives the sort (I use a Wuhstof for those purposes). If you have any thoughts pertaining to exactly where and how to use Best Place To Buy Steak Knives, you can call us at the web site. I hate to admit this, but my chef knife expense me about $400 with a discount, which means you'll in all probability pay about $450 for this knife at dwelling. This knife calls for a lot of care, but this care will be rewarded by how astounding this knife is. So I hope that aids a couple of persons out with their knife options. Copyright 2011 - 2014 sousababy.

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The Petty knife is extremely convenient for when you will need to slice soft vegetables that are light in weight such as the string beans, onions and other medium size vegetables. This knife ranges in weight amongst 70-80gm, can be anyplace among 225-260mm in length and has a blade that is 1.5mm thick. It is easy to use a boning knife specially when you will need to take fantastic care although maneuvering. This makes them one particular of the most uncomplicated to preserve knife blade supplies.

But use caution, this knife can and will hurt you if you do not respect the knife. Before I talk brands, let's talk about what one should really look for in a knife. While there are those that want expert top quality, it is not always vital to spend $300 for a knife you are going to use at household. Don't go smaller sized, these five inch blades are just to have a cute knife. This extremely sharp knife has a square tip.

Examine to French knife, which you do not have to exert any effort, cutting with the use of German knife requirements more force when cutting. Great order on the web Henckels TWIN Master 9.five" Chef Knife with Green Handle & Outlet retailer. You'll be in a position to in discovering the lowest costs tag on Henckels TWIN Master 9.five" Chef Knife with Green Manage. Buy Henckels TWIN Master 9.5" Chef Knife with Green Deal with is safe & speedy transport. Looking for low cost or economicalknife.

If you decide on to obtain a Chicago cutlery kitchen knife set, you will obtain a carving knife, a paring knife, bread knife, butcher knife, filet knife, utility and chef knives, with each other with a lifetime warranty. The Chicago cutlery chef knife belongs to a single of the most trusted brands in the cutlery market place and is fairly a protected bet when you are undecided about what knife variety or brand to get. Chef knife sets however refers to related tools utilized by a chef in the preparation of meals. Wonderful knife.

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