SYSTEMS AND METHODS OF BLOCKCHAIN PLATFORM FOR INTERMEDIARIES AND PASSWORDLESS LOGIN

1 . A method on a blockchain platform for one or more intermediaries comprising:

receiving a ciphertext from a first user with condition parameters that has been encrypted with a dynamically selected encryption algorithm;

receiving a re-encryption key for a second user from the first user;

identifying whether the ciphertext is valid;

re-encrypting the ciphertext;

outputting the re-encrypted ciphertext only if the ciphertext is valid; and

achieving security against chosen ciphertext attack and distributed denial-of-service attack;

sending the re-encrypted ciphertext to the second user for decryption.

2 . The method of claim 1 , wherein the intermediary does not have the ability to decrypt the received ciphertext.

3 . The method of claim 1 , further comprising:

skipping outputting the re-encrypted ciphertext based on one or more condition parameters.

4 . The method of claim 1 , further comprising:

sending the re-encrypted ciphertext to a second intermediary for second hop re-encryption.

5 . A method of a blockchain platform for an intermediary, comprising:

receiving an encrypted file from a user for storage on the blockchain platform;

mapping the user to be the owner of the encrypted file;

receiving one or more security policy parameters for the encrypted file from the owner;

enforcing the security policy parameters for all access requests to the file on the blockchain platform; and

optionally providing audit report of the encrypted file storage and access.

6 . The method of claim 5 , wherein the owner is established using past read or write transactions performed directly on the blockchain platform.

7 . The method of claim 5 , further comprising: dividing the encrypted file into two or more parts before sending for storage on the blockchain platform.

8 . A method of a blockchain platform for a smart wallet, comprising:

assigning a total number of two or more public-private key pairs for users associated with the smart wallet;

allocating a threshold number for approval on transaction on the smart wallet wherein the threshold number is less than or equal to the total number;

creating a group key from the total number of public-private keys and the threshold number for approvals;

using the group key to register the smart wallet on the blockchain;

receiving for a transaction a shared signature based on the group key from two or more users;

validating and finalizing the transaction when the received signatures are more than the threshold number.

9 . The method of claim 8 , wherein:

the smart wallet with the group key supports all the functions of a single user wallet.

10 . A method of blockchain platform for authenticating clients, comprising of:

creating a public and private key at a client device;

splitting the private key into two or more parts;

assigning the split private key part to two or more client devices;

signing to authenticate a challenge using a partial key part at one of the client devices;

sending the challenge to the remaining client devices who sequentially sign using short range wireless network connection;

responding back to the challenge to login without a password.

11 . A system on a blockchain platform for one or more intermediaries comprising:

a module to receive a ciphertext from a first user with condition parameters that has been encrypted with a dynamically selected encryption algorithm;

a module to receive a re-encryption key for a second user from the first user;

a module to identify whether the ciphertext is valid;

a module to re-encrypt the ciphertext;

a module to output the re-encrypted ciphertext only if the ciphertext is valid; and

a module to achieve security against chosen ciphertext attack and distributed denial-of-service attack;

a module to send the re-encrypted ciphertext to the second user for decryption.

12 . The system of claim 11 , wherein the intermediary does not have the ability to decrypt the received ciphertext.

13 . The system of claim 11 , further comprising:

a module to skip outputting the re-encrypted ciphertext based on one or more condition parameters.

14 . The system of claim 11 , further comprising:

a module to send the re-encrypted ciphertext to a second intermediary for second hop re-encryption.

15 . A system of a blockchain platform for an intermediary, comprising:

a module to receive an encrypted file from a user for storage on the blockchain platform;

a module to map the user to be the owner of the encrypted file;

a module to receive one or more security policy parameters for the encrypted file from the owner;

a module to enforce the security policy parameters for all access requests to the file on the blockchain platform; and

optionally a module to provide audit report of the encrypted file storage and access.

16 . The system of claim 15 , wherein the owner is established using past read or write transactions performed directly on the blockchain platform.

17 . The system of claim 15 , further comprising: a module to divide the encrypted file into two or more parts before sending for storage on the blockchain platform.

18 . A system of a blockchain platform for a smart wallet, comprising:

a module to assign a total number of two or more public-private key pairs for users associated with the smart wallet;

a module to allocate a threshold number for approval on transaction on the smart wallet wherein the threshold number is less than or equal to the total number;

a module to create a group key from the total number of public-private keys and the threshold number for approvals;

a module to use the group key to register the smart wallet on the blockchain;

a module to receive for a transaction a shared signature based on the group key from two or more users;

a module to validate and finalize the transaction when the received signatures are more than the threshold number.

19 . The system of claim 18 , wherein:

the smart wallet with the group key supports all the functions of a single user wallet.

20 . A system of blockchain platform for authenticating clients, comprising of:

a module to create a public and private key at a client device;

a module to split the private key into two or more parts;

a module to assign the split private key part to two or more client devices;

a module to sign to authenticate a challenge using a partial key part at one of the client devices;

a module to send the challenge to the remaining client devices who sequentially sign using short range wireless network connection;

a module to respond back to the challenge to login without a password.